/* * Copyright (c) 1997, Stefan Esser * 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. * * $FreeBSD: src/sys/i386/isa/pcibus.c,v 1.57.2.12 2003/08/07 06:19:26 imp Exp $ * $DragonFly: src/sys/bus/pci/i386/pcibus.c,v 1.18 2007/05/01 00:05:16 dillon Exp $ * */ #include #include #include #include #include #include #include #include #include #include #include #include #include "pcib_if.h" static u_int32_t nexus_pcib_read_config(device_t, int, int, int, int, int); /* * Figure out if a PCI entity is a host bridge, return its name or NULL. */ static const char * nexus_legacypci_is_host_bridge(int bus, int slot, int func, u_int32_t id, u_int8_t class, u_int8_t subclass, u_int8_t *busnum) { const char *s = NULL; static u_int8_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 = nexus_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 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 = nexus_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 busses 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] = nexus_pcib_read_config(0, bus, slot, func, 0xd0, 1); /* BUSNO[0] */ pxb[1] = nexus_pcib_read_config(0, bus, slot, func, 0xd1, 1) + 1; /* SUBA[0]+1 */ pxb[2] = nexus_pcib_read_config(0, bus, slot, func, 0xd3, 1); /* BUSNO[1] */ pxb[3] = nexus_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 kprintf("*** WARNING: kernel option CPU_ELAN missing"); kprintf("-- 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 = nexus_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 */ /* FALLTHROUGH */ s = "ServerWorks host to PCI bridge"; *busnum = nexus_pcib_read_config(0, bus, slot, func, 0x44, 1); break; case 0x00091166: s = "ServerWorks NB6635 3.0LE host to PCI bridge"; *busnum = nexus_pcib_read_config(0, bus, slot, func, 0x44, 1); break; case 0x00101166: s = "ServerWorks CIOB30 host to PCI bridge"; *busnum = nexus_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 = nexus_pcib_read_config(0, bus, slot, func, 0x44, 1); break; /* XXX unknown chipset, but working */ case 0x00171166: /* FALLTHROUGH */ case 0x01011166: s = "ServerWorks host to PCI bridge(unknown chipset)"; *busnum = nexus_pcib_read_config(0, bus, slot, func, 0x44, 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; } /* * Identify the existance of the first pci bus and install a child to * nexus if we find it. Use an order of 1 so it gets probed after * any ACPI device installed under nexus. To avoid boot-time confusion, * we do not install any 'pcib' devices at this time. * * The identify method coupled with the driver spec of the same name * automatically installs it under the nexus. */ static int nexus_legacypci_identify(driver_t *driver, device_t parent) { /* * Basically a static device, there's no point reinstalling it * on rescan. */ if (device_get_state(parent) == DS_ATTACHED) return (0); if (device_get_state(parent) == DS_INPROGRESS) return (0); if (pci_cfgregopen() == 0) return (ENXIO); BUS_ADD_CHILD(parent, parent, 100, "legacypci", 0); return (0); } /* * Scan the first pci bus for host-pci bridges and add pcib instances * to the nexus for each bridge. */ static int nexus_legacypci_probe(device_t dev) { int bus, slot, func; u_int8_t hdrtype; int found = 0; int pcifunchigh; int found824xx = 0; device_t child; /* * Do not install any pci busses ('pcib' devices) if the PCI * subsystem has already been claimed by someone else. */ if (pcib_owner != NULL) { device_printf(dev, "PCI subsystem owned by %s, skipping scan\n", pcib_owner); return (ENXIO); } pcib_owner = "legacypci"; if (pci_cfgregopen() == 0) return (ENXIO); /* * Scan away! */ bus = 0; retry: for (slot = 0; slot <= PCI_SLOTMAX; slot++) { func = 0; hdrtype = nexus_pcib_read_config(0, bus, slot, func, PCIR_HDRTYPE, 1); if ((hdrtype & ~PCIM_MFDEV) > 2) continue; if (hdrtype & PCIM_MFDEV) pcifunchigh = 7; else pcifunchigh = 0; for (func = 0; func <= pcifunchigh; func++) { /* * Read the IDs and class from the device. */ u_int32_t id; u_int8_t class, subclass, busnum; const char *s; device_t *devs; int ndevs, i; id = nexus_pcib_read_config(0, bus, slot, func, PCIR_DEVVENDOR, 4); if (id == -1) continue; class = nexus_pcib_read_config(0, bus, slot, func, PCIR_CLASS, 1); subclass = nexus_pcib_read_config(0, bus, slot, func, PCIR_SUBCLASS, 1); s = nexus_legacypci_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(dev, &devs, &ndevs) == 0) { for (i = 0; s != NULL && i < ndevs; i++) { if (strcmp(device_get_name(devs[i]), "pcib") != 0) continue; if (nexus_get_pcibus(devs[i]) == busnum) s = NULL; } kfree(devs, M_TEMP); } if (s == NULL) continue; /* * Add at priority 100+busnum to keep the scanning * order sane in the boot dmesg output. */ child = BUS_ADD_CHILD(dev, dev, 100 + busnum, "pcib", busnum); device_set_desc(child, s); nexus_set_pcibus(child, busnum); found = 1; if (id == 0x12258086) found824xx = 1; } } if (found824xx && bus == 0) { bus++; goto retry; } #if 0 /* * Now that we have installed the main PCI bridges, go * probe and attach each one. */ bus_generic_attach(dev); #endif /* * 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) { kprintf("nexus_pcib_identify: no bridge found, " "adding pcib0 anyway\n"); } child = BUS_ADD_CHILD(dev, dev, 100, "pcib", 0); nexus_set_pcibus(child, 0); } return (0); } static int nexus_legacypci_attach(device_t dev) { bus_generic_attach(dev); return (0); } static device_method_t legacypci_methods[] = { /* Device interface */ DEVMETHOD(device_identify, nexus_legacypci_identify), DEVMETHOD(device_probe, nexus_legacypci_probe), DEVMETHOD(device_attach, nexus_legacypci_attach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* * Bus interface - propogate through to the nexus. Note that * this means devices under us will have nexus ivars. */ DEVMETHOD(bus_add_child, bus_generic_add_child), DEVMETHOD(bus_print_child, bus_generic_print_child), DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), DEVMETHOD(bus_alloc_resource, bus_generic_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), DEVMETHOD(bus_set_resource, bus_generic_set_resource), DEVMETHOD(bus_get_resource, bus_generic_get_resource), DEVMETHOD(bus_delete_resource, bus_generic_delete_resource), { 0, 0 } }; static driver_t legacypci_driver = { "legacypci", legacypci_methods, 1, }; static devclass_t legacypci_devclass; DRIVER_MODULE(legacypci, nexus, legacypci_driver, legacypci_devclass, 0, 0); /* * Legacypci Host-Bridge PCI BUS support. The underlying pcib devices * will only exist if we actually control the PCI bus. The actual PCI * bus driver is attached in our attach routine. * * There is no identify function because the legacypci placeholder will * have already scanned and added PCIB devices for the host-bridges found. */ static int nexus_pcib_maxslots(device_t dev) { return 31; } /* * Read configuration space register. */ static u_int32_t nexus_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes) { return (pci_cfgregread(bus, slot, func, reg, bytes)); } /* * Write configuration space register. */ static void nexus_pcib_write_config(device_t dev, int bus, int slot, int func, int reg, u_int32_t data, int bytes) { pci_cfgregwrite(bus, slot, func, reg, data, bytes); } /* * Stack a pci device on top of the pci bridge bus device. */ static int nexus_pcib_probe(device_t dev) { BUS_ADD_CHILD(dev, dev, 0, "pci", device_get_unit(dev)); return (0); } static int nexus_pcib_attach(device_t dev) { int error; error = bus_generic_attach(dev); return (error); } /* route interrupt */ static int nexus_pcib_route_interrupt(device_t pcib, device_t dev, int pin) { return(pci_cfgintr(pci_get_bus(dev), pci_get_slot(dev), pin, pci_get_irq(dev))); } static device_method_t nexus_pcib_methods[] = { /* Device interface */ DEVMETHOD(device_probe, nexus_pcib_probe), DEVMETHOD(device_attach, nexus_pcib_attach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* * Bus interface - propogate through to the nexus. Note * that this means we will get nexus-managed ivars. */ DEVMETHOD(bus_add_child, bus_generic_add_child), DEVMETHOD(bus_print_child, bus_generic_print_child), DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), DEVMETHOD(bus_alloc_resource, bus_generic_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, nexus_pcib_maxslots), DEVMETHOD(pcib_read_config, nexus_pcib_read_config), DEVMETHOD(pcib_write_config, nexus_pcib_write_config), DEVMETHOD(pcib_route_interrupt, nexus_pcib_route_interrupt), { 0, 0 } }; static driver_t nexus_pcib_driver = { "pcib", nexus_pcib_methods, 1, }; static devclass_t pcib_devclass; DRIVER_MODULE(pcib, legacypci, nexus_pcib_driver, pcib_devclass, 0, 0); /* * Provide a device to "eat" the host->pci bridges that we dug up above * and stop them showing up twice on the probes. This also stops them * showing up as 'none' in pciconf -l. * * Return an ultra-low priority so other devices can attach the bus before * our dummy attach. * * XXX may have to disable the registration entirely to support module-loaded * bridges such as agp.ko. */ static int pci_hostb_probe(device_t dev) { if (pci_get_class(dev) == PCIC_BRIDGE && pci_get_subclass(dev) == PCIS_BRIDGE_HOST) { device_set_desc(dev, "Host to PCI bridge"); device_quiet(dev); return -10000; } return (ENXIO); } static int pci_hostb_attach(device_t dev) { return (0); } static device_method_t pci_hostb_methods[] = { /* Device interface */ DEVMETHOD(device_probe, pci_hostb_probe), DEVMETHOD(device_attach, pci_hostb_attach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), { 0, 0 } }; static driver_t pci_hostb_driver = { "hostb", pci_hostb_methods, 1, }; static devclass_t pci_hostb_devclass; DRIVER_MODULE(hostb, pci, pci_hostb_driver, pci_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. * * XXX we should silence this probe, as it will generally confuse * people. */ static struct isa_pnp_id pcibus_pnp_ids[] = { { 0x030ad041 /* PNP030A */, "PCI 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 driver_t pcibus_pnp_driver = { "pcibus_pnp", pcibus_pnp_methods, 1, /* no softc */ }; static devclass_t pcibus_pnp_devclass; DRIVER_MODULE(pcibus_pnp, isa, pcibus_pnp_driver, pcibus_pnp_devclass, 0, 0);