aa7402e864
base register that controls Ultra-DMA, so we need to examine all possible base registers instead of just giving up at the first empty one. Also, looking at the source code to the BIOS, I see that they are also checking for 0xffffffff as an invalid value so do the same. Stefan may like to clean this up, but at least now I can find my PCI IDE registers.
956 lines
24 KiB
C
956 lines
24 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 1.89 1998/09/16 08:28:11 dfr 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 "opt_devfs.h"
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#include "opt_simos.h"
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#include <sys/param.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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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/buf.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 <vm/vm_extern.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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#ifdef APIC_IO
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#include <machine/smp.h>
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#endif /* APIC_IO */
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STAILQ_HEAD(devlist, pci_devinfo) pci_devq;
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u_int32_t pci_numdevs = 0;
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u_int32_t pci_generation = 0;
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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, j = 0;
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pcimap *map;
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int map64 = 0;
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int reg = PCIR_MAPS;
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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 || base == 0xffffffff)
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continue; /* skip invalid entry */
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else {
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j++;
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if (ln2range > 32) {
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i++;
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j++;
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}
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}
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}
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map = malloc(j * sizeof (pcimap), M_DEVBUF, M_WAITOK);
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if (map != NULL) {
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bzero(map, sizeof(pcimap) * j);
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cfg->nummaps = j;
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for (i = 0, j = 0; i < maxmaps; i++, reg += 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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if (base == 0 || base == 0xffffffff)
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continue; /* skip invalid entry */
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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[j].base = pci_mapbase(base);
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map[j].type = pci_maptype(base);
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map[j].ln2size = pci_mapsize(testval);
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map[j].ln2range = pci_maprange(testval);
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map64 = map[j].ln2range == 64;
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} else {
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/* only fill in base, other fields are 0 */
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map[j].base = base;
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map64 = 0;
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}
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j++;
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}
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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->baseclass == 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 struct pci_devinfo *
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pci_readcfg(pcicfgregs *probe)
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{
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pcicfgregs *cfg = NULL;
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struct pci_devinfo *devlist_entry;
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struct devlist *devlist_head;
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devlist_head = &pci_devq;
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devlist_entry = NULL;
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if (pci_cfgread(probe, PCIR_DEVVENDOR, 4) != -1) {
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devlist_entry = malloc(sizeof(struct pci_devinfo),
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M_DEVBUF, M_WAITOK);
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if (devlist_entry == NULL)
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return (NULL);
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cfg = &devlist_entry->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->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->baseclass = 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 __alpha__
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alpha_platform_assign_pciintr(cfg);
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#endif
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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 = pci_apic_irq(cfg->bus, cfg->slot, cfg->intpin);
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if (airq >= 0) {
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/* PCI specific entry found in MP table */
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if (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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} else {
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/*
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* PCI interrupts might be redirected to the
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* ISA bus according to some MP tables. Use the
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* same methods as used by the ISA devices
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* devices to find the proper IOAPIC int pin.
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*/
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airq = isa_apic_irq(cfg->intline);
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if ((airq >= 0) && (airq != cfg->intline)) {
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/* XXX: undirect_pci_irq() ? */
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undirect_isa_irq(cfg->intline);
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cfg->intline = airq;
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}
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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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STAILQ_INSERT_TAIL(devlist_head, devlist_entry, pci_links);
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devlist_entry->conf.pc_sel.pc_bus = cfg->bus;
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devlist_entry->conf.pc_sel.pc_dev = cfg->slot;
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devlist_entry->conf.pc_sel.pc_func = cfg->func;
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devlist_entry->conf.pc_hdr = cfg->hdrtype;
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devlist_entry->conf.pc_subvendor = cfg->subvendor;
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devlist_entry->conf.pc_subdevice = cfg->subdevice;
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devlist_entry->conf.pc_vendor = cfg->vendor;
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devlist_entry->conf.pc_device = cfg->device;
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devlist_entry->conf.pc_class = cfg->baseclass;
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devlist_entry->conf.pc_subclass = cfg->subclass;
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devlist_entry->conf.pc_progif = cfg->progif;
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devlist_entry->conf.pc_revid = cfg->revid;
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pci_numdevs++;
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pci_generation++;
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}
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return (devlist_entry);
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}
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#if 0
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/* free pcicfgregs structure and all depending data structures */
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static int
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pci_freecfg(struct pci_devinfo *dinfo)
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{
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struct devlist *devlist_head;
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devlist_head = &pci_devq;
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if (dinfo->cfg.hdrspec != NULL)
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free(dinfo->cfg.hdrspec, M_DEVBUF);
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if (dinfo->cfg.map != NULL)
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free(dinfo->cfg.map, M_DEVBUF);
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/* XXX this hasn't been tested */
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STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links);
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free(dinfo, M_DEVBUF);
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/* increment the generation count */
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pci_generation++;
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/* we're losing one device */
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pci_numdevs--;
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return (0);
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}
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#endif
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static void
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pci_addcfg(struct pci_devinfo *dinfo)
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{
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if (bootverbose) {
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int i;
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pcicfgregs *cfg = &dinfo->cfg;
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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->baseclass, cfg->subclass, cfg->progif,
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cfg->hdrtype, cfg->mfdev);
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printf("\tsubordinatebus=%x \tsecondarybus=%x\n",
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cfg->subordinatebus, cfg->secondarybus);
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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];
|
|
printf("\tmap[%d]: type %x, range %2d, base %08x, size %2d\n",
|
|
i, m->type, m->ln2range, m->base, m->ln2size);
|
|
}
|
|
}
|
|
pci_drvattach(dinfo); /* XXX currently defined in pci_compat.c */
|
|
}
|
|
|
|
/* return pointer to device that is a bridge to this bus */
|
|
|
|
static pcicfgregs *
|
|
pci_bridgeto(int bus)
|
|
{
|
|
return (NULL); /* XXX not yet implemented */
|
|
}
|
|
|
|
/* scan one PCI bus for devices */
|
|
|
|
static int
|
|
pci_probebus(int bus)
|
|
{
|
|
pcicfgregs probe;
|
|
int bushigh = bus;
|
|
|
|
#ifdef SIMOS
|
|
#undef PCI_SLOTMAX
|
|
#define PCI_SLOTMAX 0
|
|
#endif
|
|
|
|
bzero(&probe, sizeof probe);
|
|
/* XXX KDM */
|
|
/* probe.parent = pci_bridgeto(bus); */
|
|
probe.bus = bus;
|
|
for (probe.slot = 0; probe.slot <= PCI_SLOTMAX; probe.slot++) {
|
|
int pcifunchigh = 0;
|
|
for (probe.func = 0; probe.func <= pcifunchigh; probe.func++) {
|
|
struct pci_devinfo *dinfo = pci_readcfg(&probe);
|
|
if (dinfo != NULL) {
|
|
if (dinfo->cfg.mfdev)
|
|
pcifunchigh = 7;
|
|
/*
|
|
* XXX: Temporarily move pci_addcfg() up before
|
|
* the use of cfg->subordinatebus. This is
|
|
* necessary, since pci_addcfg() calls the
|
|
* device's probe(), which may read the bus#
|
|
* from some device dependent register of
|
|
* some host to PCI bridges. The probe will
|
|
* eventually be moved to pci_readcfg(), and
|
|
* pci_addcfg() will then be moved back down
|
|
* below the conditional statement ...
|
|
*/
|
|
pci_addcfg(dinfo);
|
|
|
|
if (bushigh < dinfo->cfg.subordinatebus)
|
|
bushigh = dinfo->cfg.subordinatebus;
|
|
if (bushigh < dinfo->cfg.secondarybus)
|
|
bushigh = dinfo->cfg.secondarybus;
|
|
|
|
/* XXX KDM */
|
|
/* cfg = NULL; we don't own this anymore ... */
|
|
}
|
|
}
|
|
}
|
|
return (bushigh);
|
|
}
|
|
|
|
/* scan a PCI bus tree reached through one PCI attachment point */
|
|
|
|
int
|
|
pci_probe(pciattach *parent)
|
|
{
|
|
int bushigh;
|
|
int bus = 0;
|
|
|
|
STAILQ_INIT(&pci_devq);
|
|
|
|
bushigh = pci_bushigh();
|
|
while (bus <= bushigh) {
|
|
int newbushigh;
|
|
|
|
printf("Probing for devices on PCI bus %d:\n", bus);
|
|
newbushigh = pci_probebus(bus);
|
|
|
|
if (bushigh < newbushigh)
|
|
bushigh = newbushigh;
|
|
bus++;
|
|
}
|
|
return (bushigh);
|
|
}
|
|
|
|
/*
|
|
* This is the user interface to PCI configuration space.
|
|
*/
|
|
|
|
static int
|
|
pci_open(dev_t dev, int oflags, int devtype, struct proc *p)
|
|
{
|
|
if ((oflags & FWRITE) && securelevel > 0) {
|
|
return EPERM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pci_close(dev_t dev, int flag, int devtype, struct proc *p)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Match a single pci_conf structure against an array of pci_match_conf
|
|
* structures. The first argument, 'matches', is an array of num_matches
|
|
* pci_match_conf structures. match_buf is a pointer to the pci_conf
|
|
* structure that will be compared to every entry in the matches array.
|
|
* This function returns 1 on failure, 0 on success.
|
|
*/
|
|
static int
|
|
pci_conf_match(struct pci_match_conf *matches, int num_matches,
|
|
struct pci_conf *match_buf)
|
|
{
|
|
int i;
|
|
|
|
if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0))
|
|
return(1);
|
|
|
|
for (i = 0; i < num_matches; i++) {
|
|
/*
|
|
* I'm not sure why someone would do this...but...
|
|
*/
|
|
if (matches[i].flags == PCI_GETCONF_NO_MATCH)
|
|
continue;
|
|
|
|
/*
|
|
* Look at each of the match flags. If it's set, do the
|
|
* comparison. If the comparison fails, we don't have a
|
|
* match, go on to the next item if there is one.
|
|
*/
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_BUS) != 0)
|
|
&& (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_DEV) != 0)
|
|
&& (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC) != 0)
|
|
&& (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR) != 0)
|
|
&& (match_buf->pc_vendor != matches[i].pc_vendor))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE) != 0)
|
|
&& (match_buf->pc_device != matches[i].pc_device))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS) != 0)
|
|
&& (match_buf->pc_class != matches[i].pc_class))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT) != 0)
|
|
&& (match_buf->pd_unit != matches[i].pd_unit))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_NAME) != 0)
|
|
&& (strncmp(matches[i].pd_name, match_buf->pd_name,
|
|
sizeof(match_buf->pd_name)) != 0))
|
|
continue;
|
|
|
|
return(0);
|
|
}
|
|
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
pci_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
|
|
{
|
|
struct pci_io *io;
|
|
int error;
|
|
|
|
if (!(flag & FWRITE))
|
|
return EPERM;
|
|
|
|
|
|
switch(cmd) {
|
|
case PCIOCGETCONF:
|
|
{
|
|
struct pci_devinfo *dinfo;
|
|
struct pci_conf_io *cio;
|
|
struct devlist *devlist_head;
|
|
struct pci_match_conf *pattern_buf;
|
|
int num_patterns;
|
|
size_t iolen;
|
|
int ionum, i;
|
|
|
|
cio = (struct pci_conf_io *)data;
|
|
|
|
num_patterns = 0;
|
|
dinfo = NULL;
|
|
|
|
/*
|
|
* Hopefully the user won't pass in a null pointer, but it
|
|
* can't hurt to check.
|
|
*/
|
|
if (cio == NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If the user specified an offset into the device list,
|
|
* but the list has changed since they last called this
|
|
* ioctl, tell them that the list has changed. They will
|
|
* have to get the list from the beginning.
|
|
*/
|
|
if ((cio->offset != 0)
|
|
&& (cio->generation != pci_generation)){
|
|
cio->num_matches = 0;
|
|
cio->status = PCI_GETCONF_LIST_CHANGED;
|
|
error = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check to see whether the user has asked for an offset
|
|
* past the end of our list.
|
|
*/
|
|
if (cio->offset >= pci_numdevs) {
|
|
cio->num_matches = 0;
|
|
cio->status = PCI_GETCONF_LAST_DEVICE;
|
|
error = 0;
|
|
break;
|
|
}
|
|
|
|
/* get the head of the device queue */
|
|
devlist_head = &pci_devq;
|
|
|
|
/*
|
|
* Determine how much room we have for pci_conf structures.
|
|
* Round the user's buffer size down to the nearest
|
|
* multiple of sizeof(struct pci_conf) in case the user
|
|
* didn't specify a multiple of that size.
|
|
*/
|
|
iolen = min(cio->match_buf_len -
|
|
(cio->match_buf_len % sizeof(struct pci_conf)),
|
|
pci_numdevs * sizeof(struct pci_conf));
|
|
|
|
/*
|
|
* Since we know that iolen is a multiple of the size of
|
|
* the pciconf union, it's okay to do this.
|
|
*/
|
|
ionum = iolen / sizeof(struct pci_conf);
|
|
|
|
/*
|
|
* If this test is true, the user wants the pci_conf
|
|
* structures returned to match the supplied entries.
|
|
*/
|
|
if ((cio->num_patterns > 0)
|
|
&& (cio->pat_buf_len > 0)) {
|
|
/*
|
|
* pat_buf_len needs to be:
|
|
* num_patterns * sizeof(struct pci_match_conf)
|
|
* While it is certainly possible the user just
|
|
* allocated a large buffer, but set the number of
|
|
* matches correctly, it is far more likely that
|
|
* their kernel doesn't match the userland utility
|
|
* they're using. It's also possible that the user
|
|
* forgot to initialize some variables. Yes, this
|
|
* may be overly picky, but I hazard to guess that
|
|
* it's far more likely to just catch folks that
|
|
* updated their kernel but not their userland.
|
|
*/
|
|
if ((cio->num_patterns *
|
|
sizeof(struct pci_match_conf)) != cio->pat_buf_len){
|
|
/* The user made a mistake, return an error*/
|
|
cio->status = PCI_GETCONF_ERROR;
|
|
printf("pci_ioctl: pat_buf_len %d != "
|
|
"num_patterns (%d) * sizeof(struct "
|
|
"pci_match_conf) (%d)\npci_ioctl: "
|
|
"pat_buf_len should be = %d\n",
|
|
cio->pat_buf_len, cio->num_patterns,
|
|
sizeof(struct pci_match_conf),
|
|
sizeof(struct pci_match_conf) *
|
|
cio->num_patterns);
|
|
printf("pci_ioctl: do your headers match your "
|
|
"kernel?\n");
|
|
cio->num_matches = 0;
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check the user's buffer to make sure it's readable.
|
|
*/
|
|
if ((error = useracc((caddr_t)cio->patterns,
|
|
cio->pat_buf_len, B_READ)) != 1){
|
|
printf("pci_ioctl: pattern buffer %#p, "
|
|
"length %u isn't user accessible for"
|
|
" READ\n", cio->patterns,
|
|
cio->pat_buf_len);
|
|
error = EACCES;
|
|
break;
|
|
}
|
|
/*
|
|
* Allocate a buffer to hold the patterns.
|
|
*/
|
|
pattern_buf = malloc(cio->pat_buf_len, M_TEMP,
|
|
M_WAITOK);
|
|
error = copyin(cio->patterns, pattern_buf,
|
|
cio->pat_buf_len);
|
|
if (error != 0)
|
|
break;
|
|
num_patterns = cio->num_patterns;
|
|
|
|
} else if ((cio->num_patterns > 0)
|
|
|| (cio->pat_buf_len > 0)) {
|
|
/*
|
|
* The user made a mistake, spit out an error.
|
|
*/
|
|
cio->status = PCI_GETCONF_ERROR;
|
|
cio->num_matches = 0;
|
|
printf("pci_ioctl: invalid GETCONF arguments\n");
|
|
error = EINVAL;
|
|
break;
|
|
} else
|
|
pattern_buf = NULL;
|
|
|
|
/*
|
|
* Make sure we can write to the match buffer.
|
|
*/
|
|
if ((error = useracc((caddr_t)cio->matches, cio->match_buf_len,
|
|
B_WRITE)) != 1) {
|
|
printf("pci_ioctl: match buffer %#p, length %u "
|
|
"isn't user accessible for WRITE\n",
|
|
cio->matches, cio->match_buf_len);
|
|
error = EACCES;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Go through the list of devices and copy out the devices
|
|
* that match the user's criteria.
|
|
*/
|
|
for (cio->num_matches = 0, error = 0, i = 0,
|
|
dinfo = STAILQ_FIRST(devlist_head);
|
|
(dinfo != NULL) && (cio->num_matches < ionum)
|
|
&& (error == 0) && (i < pci_numdevs);
|
|
dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
|
|
|
|
if (i < cio->offset)
|
|
continue;
|
|
|
|
if ((pattern_buf == NULL) ||
|
|
(pci_conf_match(pattern_buf, num_patterns,
|
|
&dinfo->conf) == 0)) {
|
|
|
|
/*
|
|
* If we've filled up the user's buffer,
|
|
* break out at this point. Since we've
|
|
* got a match here, we'll pick right back
|
|
* up at the matching entry. We can also
|
|
* tell the user that there are more matches
|
|
* left.
|
|
*/
|
|
if (cio->num_matches >= ionum)
|
|
break;
|
|
|
|
error = copyout(&dinfo->conf,
|
|
&cio->matches[cio->num_matches],
|
|
sizeof(struct pci_conf));
|
|
cio->num_matches++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Set the pointer into the list, so if the user is getting
|
|
* n records at a time, where n < pci_numdevs,
|
|
*/
|
|
cio->offset = i;
|
|
|
|
/*
|
|
* Set the generation, the user will need this if they make
|
|
* another ioctl call with offset != 0.
|
|
*/
|
|
cio->generation = pci_generation;
|
|
|
|
/*
|
|
* If this is the last device, inform the user so he won't
|
|
* bother asking for more devices. If dinfo isn't NULL, we
|
|
* know that there are more matches in the list because of
|
|
* the way the traversal is done.
|
|
*/
|
|
if (dinfo == NULL)
|
|
cio->status = PCI_GETCONF_LAST_DEVICE;
|
|
else
|
|
cio->status = PCI_GETCONF_MORE_DEVS;
|
|
|
|
if (pattern_buf != NULL)
|
|
free(pattern_buf, M_TEMP);
|
|
|
|
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, seltrue, 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 */
|