597 lines
15 KiB
C
597 lines
15 KiB
C
/*
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* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <pci/pcivar.h>
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#include <pci/pcireg.h>
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#include <isa/isavar.h>
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#include <machine/nexusvar.h>
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#include <machine/pci_cfgreg.h>
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#include <machine/segments.h>
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#include <machine/pc/bios.h>
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#include "pcib_if.h"
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static int
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nexus_pcib_maxslots(device_t dev)
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{
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return 31;
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}
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/* read configuration space register */
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static u_int32_t
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nexus_pcib_read_config(device_t dev, int bus, int slot, int func,
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int reg, int bytes)
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{
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return(pci_cfgregread(bus, slot, func, reg, bytes));
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}
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/* write configuration space register */
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static void
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nexus_pcib_write_config(device_t dev, int bus, int slot, int func,
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int reg, u_int32_t data, int bytes)
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{
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pci_cfgregwrite(bus, slot, func, reg, data, bytes);
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}
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/* route interrupt */
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static int
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nexus_pcib_route_interrupt(device_t pcib, device_t dev, int pin)
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{
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return(pci_cfgintr(pci_get_bus(dev), pci_get_slot(dev), pin));
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}
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static devclass_t pcib_devclass;
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static const char *
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nexus_pcib_is_host_bridge(int bus, int slot, int func,
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u_int32_t id, u_int8_t class, u_int8_t subclass,
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u_int8_t *busnum)
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{
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const char *s = NULL;
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static u_int8_t pxb[4]; /* hack for 450nx */
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*busnum = 0;
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switch (id) {
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case 0x12258086:
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s = "Intel 824?? host to PCI bridge";
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/* XXX This is a guess */
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/* *busnum = nexus_pcib_read_config(0, bus, slot, func, 0x41, 1); */
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*busnum = bus;
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break;
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case 0x71208086:
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s = "Intel 82810 (i810 GMCH) Host To Hub bridge";
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break;
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case 0x71228086:
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s = "Intel 82810-DC100 (i810-DC100 GMCH) Host To Hub bridge";
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break;
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case 0x71248086:
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s = "Intel 82810E (i810E GMCH) Host To Hub bridge";
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break;
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case 0x11308086:
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s = "Intel 82815 (i815 GMCH) Host To Hub bridge";
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break;
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case 0x71808086:
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s = "Intel 82443LX (440 LX) host to PCI bridge";
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break;
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case 0x71908086:
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s = "Intel 82443BX (440 BX) host to PCI bridge";
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break;
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case 0x71928086:
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s = "Intel 82443BX host to PCI bridge (AGP disabled)";
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break;
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case 0x71948086:
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s = "Intel 82443MX host to PCI bridge";
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break;
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case 0x71a08086:
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s = "Intel 82443GX host to PCI bridge";
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break;
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case 0x71a18086:
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s = "Intel 82443GX host to AGP bridge";
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break;
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case 0x71a28086:
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s = "Intel 82443GX host to PCI bridge (AGP disabled)";
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break;
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case 0x84c48086:
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s = "Intel 82454KX/GX (Orion) host to PCI bridge";
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*busnum = nexus_pcib_read_config(0, bus, slot, func, 0x4a, 1);
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break;
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case 0x84ca8086:
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/*
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* For the 450nx chipset, there is a whole bundle of
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* things pretending to be host bridges. The MIOC will
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* be seen first and isn't really a pci bridge (the
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* actual busses are attached to the PXB's). We need to
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* read the registers of the MIOC to figure out the
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* bus numbers for the PXB channels.
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*
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* Since the MIOC doesn't have a pci bus attached, we
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* pretend it wasn't there.
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*/
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pxb[0] = nexus_pcib_read_config(0, bus, slot, func,
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0xd0, 1); /* BUSNO[0] */
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pxb[1] = nexus_pcib_read_config(0, bus, slot, func,
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0xd1, 1) + 1; /* SUBA[0]+1 */
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pxb[2] = nexus_pcib_read_config(0, bus, slot, func,
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0xd3, 1); /* BUSNO[1] */
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pxb[3] = nexus_pcib_read_config(0, bus, slot, func,
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0xd4, 1) + 1; /* SUBA[1]+1 */
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return NULL;
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case 0x84cb8086:
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switch (slot) {
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case 0x12:
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s = "Intel 82454NX PXB#0, Bus#A";
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*busnum = pxb[0];
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break;
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case 0x13:
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s = "Intel 82454NX PXB#0, Bus#B";
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*busnum = pxb[1];
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break;
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case 0x14:
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s = "Intel 82454NX PXB#1, Bus#A";
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*busnum = pxb[2];
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break;
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case 0x15:
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s = "Intel 82454NX PXB#1, Bus#B";
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*busnum = pxb[3];
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break;
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}
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break;
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/* AMD -- vendor 0x1022 */
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case 0x70061022:
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s = "AMD-751 host to PCI bridge";
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break;
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case 0x700e1022:
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s = "AMD-761 host to PCI bridge";
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break;
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/* SiS -- vendor 0x1039 */
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case 0x04961039:
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s = "SiS 85c496";
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break;
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case 0x04061039:
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s = "SiS 85c501";
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break;
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case 0x06011039:
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s = "SiS 85c601";
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break;
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case 0x55911039:
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s = "SiS 5591 host to PCI bridge";
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break;
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case 0x00011039:
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s = "SiS 5591 host to AGP bridge";
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break;
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/* VLSI -- vendor 0x1004 */
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case 0x00051004:
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s = "VLSI 82C592 Host to PCI bridge";
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break;
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/* XXX Here is MVP3, I got the datasheet but NO M/B to test it */
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/* totally. Please let me know if anything wrong. -F */
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/* XXX need info on the MVP3 -- any takers? */
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case 0x05981106:
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s = "VIA 82C598MVP (Apollo MVP3) host bridge";
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break;
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/* AcerLabs -- vendor 0x10b9 */
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/* Funny : The datasheet told me vendor id is "10b8",sub-vendor */
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/* id is '10b9" but the register always shows "10b9". -Foxfair */
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case 0x154110b9:
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s = "AcerLabs M1541 (Aladdin-V) PCI host bridge";
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break;
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/* OPTi -- vendor 0x1045 */
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case 0xc7011045:
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s = "OPTi 82C700 host to PCI bridge";
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break;
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case 0xc8221045:
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s = "OPTi 82C822 host to PCI Bridge";
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break;
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/* ServerWorks -- vendor 0x1166 */
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case 0x00051166:
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s = "ServerWorks NB6536 2.0HE host to PCI bridge";
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*busnum = nexus_pcib_read_config(0, bus, slot, func, 0x44, 1);
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break;
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case 0x00061166:
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/* FALLTHROUGH */
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case 0x00081166:
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s = "ServerWorks host to PCI bridge";
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*busnum = nexus_pcib_read_config(0, bus, slot, func, 0x44, 1);
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break;
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case 0x00091166:
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s = "ServerWorks NB6635 3.0LE host to PCI bridge";
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*busnum = nexus_pcib_read_config(0, bus, slot, func, 0x44, 1);
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break;
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/* Integrated Micro Solutions -- vendor 0x10e0 */
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case 0x884910e0:
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s = "Integrated Micro Solutions VL Bridge";
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break;
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default:
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if (class == PCIC_BRIDGE && subclass == PCIS_BRIDGE_HOST)
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s = "Host to PCI bridge";
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break;
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}
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return s;
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}
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/*
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* Scan the first pci bus for host-pci bridges and add pcib instances
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* to the nexus for each bridge.
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*/
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static void
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nexus_pcib_identify(driver_t *driver, device_t parent)
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{
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int bus, slot, func;
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u_int8_t hdrtype;
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int found = 0;
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int pcifunchigh;
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int found824xx = 0;
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int found_orion = 0;
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int found_pcibios_flaming_death = 0;
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device_t child;
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devclass_t pci_devclass;
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if (pci_cfgregopen() == 0)
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return;
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/*
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* Check to see if we haven't already had a PCI bus added
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* via some other means. If we have, bail since otherwise
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* we're going to end up duplicating it.
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*/
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if ((pci_devclass = devclass_find("pci")) &&
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devclass_get_device(pci_devclass, 0))
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return;
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bus = 0;
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retry:
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for (slot = 0; slot <= PCI_SLOTMAX; slot++) {
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func = 0;
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hdrtype = nexus_pcib_read_config(0, bus, slot, func,
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PCIR_HEADERTYPE, 1);
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if ((hdrtype & PCIM_MFDEV) &&
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(!found_orion || hdrtype != 0xff))
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pcifunchigh = 7;
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else
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pcifunchigh = 0;
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for (func = 0; func <= pcifunchigh; func++) {
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/*
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* Read the IDs and class from the device.
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*/
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u_int32_t id;
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u_int8_t class, subclass, busnum;
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const char *s;
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device_t *devs;
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int ndevs, i;
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id = nexus_pcib_read_config(0, bus, slot, func,
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PCIR_DEVVENDOR, 4);
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if (id == -1)
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continue;
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class = nexus_pcib_read_config(0, bus, slot, func,
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PCIR_CLASS, 1);
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subclass = nexus_pcib_read_config(0, bus, slot, func,
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PCIR_SUBCLASS, 1);
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s = nexus_pcib_is_host_bridge(bus, slot, func,
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id, class, subclass,
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&busnum);
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if (s == NULL)
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continue;
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/*
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* Check to see if the physical bus has already
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* been seen. Eg: hybrid 32 and 64 bit host
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* bridges to the same logical bus.
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*/
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if (device_get_children(parent, &devs, &ndevs) == 0) {
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for (i = 0; s != NULL && i < ndevs; i++) {
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if (strcmp(device_get_name(devs[i]),
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"pcib") != 0)
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continue;
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if (nexus_get_pcibus(devs[i]) == busnum)
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s = NULL;
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}
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free(devs, M_TEMP);
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}
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if (s == NULL)
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continue;
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/*
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* Add at priority 100 to make sure we
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* go after any motherboard resources
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*/
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child = BUS_ADD_CHILD(parent, 100,
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"pcib", busnum);
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device_set_desc(child, s);
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nexus_set_pcibus(child, busnum);
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found = 1;
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if (id == 0x12258086)
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found824xx = 1;
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if (id == 0x84c48086)
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found_orion = 1;
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}
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}
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if (found824xx && bus == 0) {
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bus++;
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goto retry;
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}
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/*
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* This is just freaking brilliant! Some BIOS writers have
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* decided that we must be forcibly prevented from using
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* PCIBIOS to query the host->pci bridges. If you try and
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* access configuration registers, it pretends there is
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* no pci device at that bus:device:function address.
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*/
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if (!found && pci_pcibios_active() && !found_pcibios_flaming_death) {
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/* retry with the old mechanism, or fail */
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if (pci_kill_pcibios() == 0)
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return;
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printf("nexus_pcib_identify: found broken PCIBIOS - disabling it and retrying.\n");
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printf("nexus_pcib_identify: it is bogusly censoring host->pci bridges.\n");
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found_pcibios_flaming_death = 1;
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goto retry;
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}
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/*
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* Make sure we add at least one bridge since some old
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* hardware doesn't actually have a host-pci bridge device.
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* Note that pci_cfgregopen() thinks we have PCI devices..
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*/
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if (!found) {
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if (bootverbose)
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printf(
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"nexus_pcib_identify: no bridge found, adding pcib0 anyway\n");
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child = BUS_ADD_CHILD(parent, 100, "pcib", 0);
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nexus_set_pcibus(child, 0);
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}
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}
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static int
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nexus_pcib_probe(device_t dev)
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{
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devclass_t pci_devclass;
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if (pci_cfgregopen() == 0)
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return ENXIO;
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/*
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* Check to see if we haven't already had a PCI bus added
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* via some other means. If we have, bail since otherwise
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* we're going to end up duplicating it.
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*/
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if ((pci_devclass = devclass_find("pci")) &&
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devclass_get_device(pci_devclass, device_get_unit(dev)))
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return ENXIO;
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return 0;
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}
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static int
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nexus_pcib_attach(device_t dev)
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{
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device_t child;
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child = device_add_child(dev, "pci", device_get_unit(dev));
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return bus_generic_attach(dev);
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}
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static int
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nexus_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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switch (which) {
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case PCIB_IVAR_BUS:
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*result = nexus_get_pcibus(dev);
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return 0;
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}
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return ENOENT;
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}
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static int
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nexus_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
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{
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switch (which) {
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case PCIB_IVAR_BUS:
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nexus_set_pcibus(dev, value);
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return 0;
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}
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return ENOENT;
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}
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static device_method_t nexus_pcib_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, nexus_pcib_identify),
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DEVMETHOD(device_probe, nexus_pcib_probe),
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DEVMETHOD(device_attach, nexus_pcib_attach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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DEVMETHOD(bus_read_ivar, nexus_pcib_read_ivar),
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DEVMETHOD(bus_write_ivar, nexus_pcib_write_ivar),
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DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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/* pcib interface */
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DEVMETHOD(pcib_maxslots, nexus_pcib_maxslots),
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DEVMETHOD(pcib_read_config, nexus_pcib_read_config),
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DEVMETHOD(pcib_write_config, nexus_pcib_write_config),
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DEVMETHOD(pcib_route_interrupt, nexus_pcib_route_interrupt),
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{ 0, 0 }
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};
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static driver_t nexus_pcib_driver = {
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"pcib",
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nexus_pcib_methods,
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1,
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};
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DRIVER_MODULE(pcib, nexus, nexus_pcib_driver, pcib_devclass, 0, 0);
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/*
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* Provide a device to "eat" the host->pci bridges that we dug up above
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* and stop them showing up twice on the probes. This also stops them
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* showing up as 'none' in pciconf -l.
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*/
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static int
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pci_hostb_probe(device_t dev)
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{
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u_int32_t id;
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id = pci_get_devid(dev);
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switch (id) {
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/* VIA VT82C596 Power Managment Function */
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case 0x30501106:
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return ENXIO;
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default:
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|
break;
|
|
}
|
|
|
|
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 /* PNP0A03 */, "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);
|