a9ad937362
1) Stop at the first map register that contains a zero value. 2) When testing for the map size work up from low values, since this works around a bug in some BusLogic SCSI card, which has the 16 upper port base address bits hardwired to zero. The config register dump printed in the bootverbose case has been slightly rearranged.
586 lines
14 KiB
C
586 lines
14 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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* $Id: pci.c,v 1.74 1997/05/27 19:24:36 fsmp Exp $
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*
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*/
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#include "pci.h"
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#if NPCI > 0
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#include <stddef.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/fcntl.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /* DEVFS */
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <pci/pcireg.h>
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#include <pci/pcivar.h>
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#include <pci/pci_ioctl.h>
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/* return highest PCI bus number known to be used, or -1 if none */
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static int
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pci_bushigh(void)
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{
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if (pci_cfgopen() == 0)
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return (-1);
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return (0);
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}
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/* return base address of memory or port map */
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static int
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pci_mapbase(unsigned mapreg)
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{
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int mask = 0x03;
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if ((mapreg & 0x01) == 0)
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mask = 0x0f;
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return (mapreg & ~mask);
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}
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/* return map type of memory or port map */
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static int
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pci_maptype(unsigned mapreg)
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{
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static u_int8_t maptype[0x10] = {
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PCI_MAPMEM, PCI_MAPPORT,
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PCI_MAPMEM, 0,
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PCI_MAPMEM, PCI_MAPPORT,
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0, 0,
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PCI_MAPMEM|PCI_MAPMEMP, PCI_MAPPORT,
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PCI_MAPMEM|PCI_MAPMEMP, 0,
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PCI_MAPMEM|PCI_MAPMEMP, PCI_MAPPORT,
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0, 0,
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};
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return maptype[mapreg & 0x0f];
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}
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/* return log2 of map size decoded for memory or port map */
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static int
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pci_mapsize(unsigned testval)
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{
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int ln2size;
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testval = pci_mapbase(testval);
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ln2size = 0;
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if (testval != 0) {
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while ((testval & 1) == 0)
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{
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ln2size++;
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testval >>= 1;
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}
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}
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return (ln2size);
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}
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/* return log2 of address range supported by map register */
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static int
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pci_maprange(unsigned mapreg)
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{
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int ln2range = 0;
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switch (mapreg & 0x07) {
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case 0x00:
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case 0x01:
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case 0x05:
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ln2range = 32;
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break;
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case 0x02:
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ln2range = 20;
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break;
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case 0x04:
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ln2range = 64;
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break;
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}
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return (ln2range);
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}
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/* extract map parameters into newly allocated array of pcimap structures */
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static pcimap *
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pci_readmaps(pcicfgregs *cfg, int maxmaps)
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{
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int i;
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pcimap *map;
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int map64 = 0;
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for (i = 0; i < maxmaps; i++) {
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int reg = PCIR_MAPS + i*4;
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u_int32_t base;
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u_int32_t ln2range;
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base = pci_cfgread(cfg, reg, 4);
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ln2range = pci_maprange(base);
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if (base == 0 || ln2range == 0)
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maxmaps = i;
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else if (ln2range > 32)
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i++;
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}
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map = malloc(maxmaps * sizeof (pcimap), M_DEVBUF, M_WAITOK);
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if (map != NULL) {
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bzero(map, sizeof(pcimap) * maxmaps);
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for (i = 0; i < maxmaps; i++) {
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int reg = PCIR_MAPS + i*4;
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u_int32_t base;
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u_int32_t testval;
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base = pci_cfgread(cfg, reg, 4);
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if (map64 == 0) {
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pci_cfgwrite(cfg, reg, 0xffffffff, 4);
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testval = pci_cfgread(cfg, reg, 4);
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pci_cfgwrite(cfg, reg, base, 4);
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map[i].base = pci_mapbase(base);
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map[i].type = pci_maptype(base);
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map[i].ln2size = pci_mapsize(testval);
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map[i].ln2range = pci_maprange(testval);
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map64 = map[i].ln2range == 64;
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} else {
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/* only fill in base, other fields are 0 */
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map[i].base = base;
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map64 = 0;
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}
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}
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cfg->nummaps = maxmaps;
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}
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return (map);
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}
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/* adjust some values from PCI 1.0 devices to match 2.0 standards ... */
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static void
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pci_fixancient(pcicfgregs *cfg)
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{
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if (cfg->hdrtype != 0)
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return;
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/* PCI to PCI bridges use header type 1 */
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if (cfg->class == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI)
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cfg->hdrtype = 1;
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}
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/* read config data specific to header type 1 device (PCI to PCI bridge) */
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static void *
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pci_readppb(pcicfgregs *cfg)
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{
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pcih1cfgregs *p;
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p = malloc(sizeof (pcih1cfgregs), M_DEVBUF, M_WAITOK);
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if (p == NULL)
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return (NULL);
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bzero(p, sizeof *p);
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p->secstat = pci_cfgread(cfg, PCIR_SECSTAT_1, 2);
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p->bridgectl = pci_cfgread(cfg, PCIR_BRIDGECTL_1, 2);
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p->seclat = pci_cfgread(cfg, PCIR_SECLAT_1, 1);
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p->iobase = PCI_PPBIOBASE (pci_cfgread(cfg, PCIR_IOBASEH_1, 2),
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pci_cfgread(cfg, PCIR_IOBASEL_1, 1));
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p->iolimit = PCI_PPBIOLIMIT (pci_cfgread(cfg, PCIR_IOLIMITH_1, 2),
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pci_cfgread(cfg, PCIR_IOLIMITL_1, 1));
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p->membase = PCI_PPBMEMBASE (0,
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pci_cfgread(cfg, PCIR_MEMBASE_1, 2));
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p->memlimit = PCI_PPBMEMLIMIT (0,
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pci_cfgread(cfg, PCIR_MEMLIMIT_1, 2));
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p->pmembase = PCI_PPBMEMBASE (
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(pci_addr_t)pci_cfgread(cfg, PCIR_PMBASEH_1, 4),
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pci_cfgread(cfg, PCIR_PMBASEL_1, 2));
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p->pmemlimit = PCI_PPBMEMLIMIT (
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(pci_addr_t)pci_cfgread(cfg, PCIR_PMLIMITH_1, 4),
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pci_cfgread(cfg, PCIR_PMLIMITL_1, 2));
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return (p);
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}
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/* read config data specific to header type 2 device (PCI to CardBus bridge) */
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static void *
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pci_readpcb(pcicfgregs *cfg)
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{
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pcih2cfgregs *p;
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p = malloc(sizeof (pcih2cfgregs), M_DEVBUF, M_WAITOK);
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if (p == NULL)
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return (NULL);
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bzero(p, sizeof *p);
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p->secstat = pci_cfgread(cfg, PCIR_SECSTAT_2, 2);
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p->bridgectl = pci_cfgread(cfg, PCIR_BRIDGECTL_2, 2);
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p->seclat = pci_cfgread(cfg, PCIR_SECLAT_2, 1);
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p->membase0 = pci_cfgread(cfg, PCIR_MEMBASE0_2, 4);
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p->memlimit0 = pci_cfgread(cfg, PCIR_MEMLIMIT0_2, 4);
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p->membase1 = pci_cfgread(cfg, PCIR_MEMBASE1_2, 4);
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p->memlimit1 = pci_cfgread(cfg, PCIR_MEMLIMIT1_2, 4);
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p->iobase0 = pci_cfgread(cfg, PCIR_IOBASE0_2, 4);
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p->iolimit0 = pci_cfgread(cfg, PCIR_IOLIMIT0_2, 4);
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p->iobase1 = pci_cfgread(cfg, PCIR_IOBASE1_2, 4);
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p->iolimit1 = pci_cfgread(cfg, PCIR_IOLIMIT1_2, 4);
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p->pccardif = pci_cfgread(cfg, PCIR_PCCARDIF_2, 4);
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return p;
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}
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/* extract header type specific config data */
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static void
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pci_hdrtypedata(pcicfgregs *cfg)
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{
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switch (cfg->hdrtype) {
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case 0:
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cfg->subvendor = pci_cfgread(cfg, PCIR_SUBVEND_0, 2);
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cfg->subdevice = pci_cfgread(cfg, PCIR_SUBDEV_0, 2);
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cfg->map = pci_readmaps(cfg, PCI_MAXMAPS_0);
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break;
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case 1:
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cfg->subvendor = pci_cfgread(cfg, PCIR_SUBVEND_1, 2);
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cfg->subdevice = pci_cfgread(cfg, PCIR_SUBDEV_1, 2);
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cfg->secondarybus = pci_cfgread(cfg, PCIR_SECBUS_1, 1);
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cfg->subordinatebus = pci_cfgread(cfg, PCIR_SUBBUS_1, 1);
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cfg->map = pci_readmaps(cfg, PCI_MAXMAPS_1);
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cfg->hdrspec = pci_readppb(cfg);
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break;
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case 2:
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cfg->subvendor = pci_cfgread(cfg, PCIR_SUBVEND_2, 2);
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cfg->subdevice = pci_cfgread(cfg, PCIR_SUBDEV_2, 2);
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cfg->secondarybus = pci_cfgread(cfg, PCIR_SECBUS_2, 1);
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cfg->subordinatebus = pci_cfgread(cfg, PCIR_SUBBUS_2, 1);
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cfg->map = pci_readmaps(cfg, PCI_MAXMAPS_2);
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cfg->hdrspec = pci_readpcb(cfg);
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break;
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}
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}
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/* read configuration header into pcicfgrect structure */
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static pcicfgregs *
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pci_readcfg(pcicfgregs *probe)
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{
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pcicfgregs *cfg = NULL;
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if (pci_cfgread(probe, PCIR_DEVVENDOR, 4) != -1) {
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cfg = malloc(sizeof (pcicfgregs), M_DEVBUF, M_WAITOK);
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if (cfg == NULL)
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return (cfg);
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bzero(cfg, sizeof *cfg);
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cfg->bus = probe->bus;
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cfg->slot = probe->slot;
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cfg->func = probe->func;
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cfg->parent = probe->parent;
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cfg->vendor = pci_cfgread(cfg, PCIR_VENDOR, 2);
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cfg->device = pci_cfgread(cfg, PCIR_DEVICE, 2);
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cfg->cmdreg = pci_cfgread(cfg, PCIR_COMMAND, 2);
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cfg->statreg = pci_cfgread(cfg, PCIR_STATUS, 2);
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cfg->class = pci_cfgread(cfg, PCIR_CLASS, 1);
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cfg->subclass = pci_cfgread(cfg, PCIR_SUBCLASS, 1);
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cfg->progif = pci_cfgread(cfg, PCIR_PROGIF, 1);
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cfg->revid = pci_cfgread(cfg, PCIR_REVID, 1);
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cfg->hdrtype = pci_cfgread(cfg, PCIR_HEADERTYPE, 1);
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cfg->cachelnsz = pci_cfgread(cfg, PCIR_CACHELNSZ, 1);
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cfg->lattimer = pci_cfgread(cfg, PCIR_LATTIMER, 1);
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cfg->intpin = pci_cfgread(cfg, PCIR_INTPIN, 1);
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cfg->intline = pci_cfgread(cfg, PCIR_INTLINE, 1);
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#ifdef APIC_IO
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if (cfg->intpin != 0) {
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int airq;
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airq = get_pci_apic_irq(cfg->bus,
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cfg->slot, cfg->intpin);
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if ((airq >= 0) && (airq != cfg->intline)) {
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undirect_pci_irq(cfg->intline);
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cfg->intline = airq;
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}
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}
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#endif /* APIC_IO */
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cfg->mingnt = pci_cfgread(cfg, PCIR_MINGNT, 1);
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cfg->maxlat = pci_cfgread(cfg, PCIR_MAXLAT, 1);
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cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0;
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cfg->hdrtype &= ~PCIM_MFDEV;
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pci_fixancient(cfg);
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pci_hdrtypedata(cfg);
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}
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return (cfg);
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}
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/* free pcicfgregs structure and all depending data structures */
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static int
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pci_freecfg(pcicfgregs *cfg)
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{
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if (cfg->hdrspec != NULL)
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free(cfg->hdrspec, M_DEVBUF);
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if (cfg->map != NULL)
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free(cfg->map, M_DEVBUF);
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free(cfg, M_DEVBUF);
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return (0);
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}
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static void
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pci_addcfg(pcicfgregs *cfg)
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{
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if (bootverbose) {
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int i;
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printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n",
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cfg->vendor, cfg->device, cfg->revid);
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printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n",
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cfg->class, cfg->subclass, cfg->progif, cfg->hdrtype, cfg->mfdev);
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#ifdef PCI_DEBUG
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printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n",
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cfg->cmdreg, cfg->statreg, cfg->cachelnsz);
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printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n",
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cfg->lattimer, cfg->lattimer * 30,
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cfg->mingnt, cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250);
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#endif /* PCI_DEBUG */
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if (cfg->intpin > 0)
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printf("\tintpin=%c, irq=%d\n", cfg->intpin +'a' -1, cfg->intline);
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for (i = 0; i < cfg->nummaps; i++) {
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pcimap *m = &cfg->map[i];
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printf("\tmap[%d]: type %x, range %2d, base %08x, size %2d\n",
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i, m->type, m->ln2range, m->base, m->ln2size);
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}
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}
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pci_drvattach(cfg); /* XXX currently defined in pci_compat.c */
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}
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/* return pointer to device that is a bridge to this bus */
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static pcicfgregs *
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pci_bridgeto(int bus)
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{
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return (NULL); /* XXX not yet implemented */
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}
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/* scan one PCI bus for devices */
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static int
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pci_probebus(int bus)
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{
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pcicfgregs probe;
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int bushigh = bus;
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bzero(&probe, sizeof probe);
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probe.parent = pci_bridgeto(bus);
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probe.bus = bus;
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for (probe.slot = 0; probe.slot <= PCI_SLOTMAX; probe.slot++) {
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int pcifunchigh = 0;
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for (probe.func = 0; probe.func <= pcifunchigh; probe.func++) {
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pcicfgregs *cfg = pci_readcfg(&probe);
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if (cfg != NULL) {
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if (cfg->mfdev)
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pcifunchigh = 7;
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if (bushigh < cfg->subordinatebus)
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bushigh = cfg->subordinatebus;
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pci_addcfg(cfg);
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cfg = NULL; /* we don't own this anymore ... */
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}
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}
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}
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return (bushigh);
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}
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/* scan a PCI bus tree reached through one PCI attachment point */
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int
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pci_probe(pciattach *parent)
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{
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int bushigh;
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int bus = 0;
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bushigh = pci_bushigh();
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while (bus <= bushigh) {
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int newbushigh;
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printf("Probing for devices on PCI bus %d:\n", bus);
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newbushigh = pci_probebus(bus);
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if (bushigh < newbushigh)
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bushigh = newbushigh;
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bus++;
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}
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return (bushigh);
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}
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/*
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* This is the user interface to PCI configuration space.
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*/
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static int
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pci_open(dev_t dev, int oflags, int devtype, struct proc *p)
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{
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if ((oflags & FWRITE) && securelevel > 0) {
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return EPERM;
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}
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return 0;
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}
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static int
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pci_close(dev_t dev, int flag, int devtype, struct proc *p)
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{
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return 0;
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}
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static int
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pci_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
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{
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struct pci_conf_io *cio;
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struct pci_io *io;
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size_t iolen;
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int error;
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if (cmd != PCIOCGETCONF && !(flag & FWRITE))
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return EPERM;
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switch(cmd) {
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case PCIOCGETCONF:
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#ifdef NOTYET
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static struct pci_conf *pci_dev_list;
|
|
static unsigned pci_dev_list_count;
|
|
static unsigned pci_dev_list_size;
|
|
|
|
cio = (struct pci_conf_io *)data;
|
|
iolen = min(cio->pci_len,
|
|
pci_dev_list_count * sizeof(struct pci_conf));
|
|
cio->pci_len = pci_dev_list_count * sizeof(struct pci_conf);
|
|
|
|
error = copyout(pci_dev_list, cio->pci_buf, iolen);
|
|
#else
|
|
error = ENODEV;
|
|
#endif
|
|
break;
|
|
|
|
case PCIOCREAD:
|
|
io = (struct pci_io *)data;
|
|
switch(io->pi_width) {
|
|
pcicfgregs probe;
|
|
case 4:
|
|
case 2:
|
|
case 1:
|
|
probe.bus = io->pi_sel.pc_bus;
|
|
probe.slot = io->pi_sel.pc_dev;
|
|
probe.func = io->pi_sel.pc_func;
|
|
io->pi_data = pci_cfgread(&probe,
|
|
io->pi_reg, io->pi_width);
|
|
error = 0;
|
|
break;
|
|
default:
|
|
error = ENODEV;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case PCIOCWRITE:
|
|
io = (struct pci_io *)data;
|
|
switch(io->pi_width) {
|
|
pcicfgregs probe;
|
|
case 4:
|
|
case 2:
|
|
case 1:
|
|
probe.bus = io->pi_sel.pc_bus;
|
|
probe.slot = io->pi_sel.pc_dev;
|
|
probe.func = io->pi_sel.pc_func;
|
|
pci_cfgwrite(&probe,
|
|
io->pi_reg, io->pi_data, io->pi_width);
|
|
error = 0;
|
|
break;
|
|
default:
|
|
error = ENODEV;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
error = ENOTTY;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
#define PCI_CDEV 78
|
|
|
|
static struct cdevsw pcicdev = {
|
|
pci_open, pci_close, noread, nowrite, pci_ioctl, nostop, noreset,
|
|
nodevtotty, noselect, nommap, nostrategy, "pci", 0, PCI_CDEV
|
|
};
|
|
|
|
#ifdef DEVFS
|
|
static void *pci_devfs_token;
|
|
#endif
|
|
|
|
static void
|
|
pci_cdevinit(void *dummy)
|
|
{
|
|
dev_t dev;
|
|
|
|
dev = makedev(PCI_CDEV, 0);
|
|
cdevsw_add(&dev, &pcicdev, NULL);
|
|
#ifdef DEVFS
|
|
pci_devfs_token = devfs_add_devswf(&pcicdev, 0, DV_CHR,
|
|
UID_ROOT, GID_WHEEL, 0644, "pci");
|
|
#endif
|
|
}
|
|
|
|
SYSINIT(pcidev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+PCI_CDEV, pci_cdevinit, NULL);
|
|
|
|
#endif /* NPCI > 0 */
|