d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
f53e8493fb
freebsd-nq/sys/dev/pci/pci.c
Mike Smith f53e8493fb Unconditionally turning on the I/O and memory enable bits in the PCI 
command register is too aggressive.  Revert to the previous behaviour, but
leave the new behaviour available as an undocumented option.  It's not
clear what the Right, Right Thing is to do here, but the more conservative
approach is safer.
2000-10-28 23:07:13 +00:00

1451 lines
36 KiB
C
Raw Blame History

/*
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#include "opt_bus.h"
#include "opt_simos.h"
#include "opt_compat_oldpci.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <machine/md_var.h> /* For the Alpha */
#include <sys/pciio.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#include "pcib_if.h"
#ifdef __alpha__
#include <machine/rpb.h>
#endif
#ifdef APIC_IO
#include <machine/smp.h>
#endif /* APIC_IO */
static devclass_t pci_devclass;
struct pci_quirk {
u_int32_t devid; /* Vendor/device of the card */
int type;
#define PCI_QUIRK_MAP_REG 1 /* PCI map register in wierd place */
int arg1;
int arg2;
};
struct pci_quirk pci_quirks[] = {
/*
* The Intel 82371AB has a map register at offset 0x90.
*/
{ 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 },
{ 0 }
};
/* map register information */
#define PCI_MAPMEM 0x01 /* memory map */
#define PCI_MAPMEMP 0x02 /* prefetchable memory map */
#define PCI_MAPPORT 0x04 /* port map */
static STAILQ_HEAD(devlist, pci_devinfo) pci_devq;
u_int32_t pci_numdevs = 0;
static u_int32_t pci_generation = 0;
/* return base address of memory or port map */
static u_int32_t
pci_mapbase(unsigned mapreg)
{
int mask = 0x03;
if ((mapreg & 0x01) == 0)
mask = 0x0f;
return (mapreg & ~mask);
}
/* return map type of memory or port map */
static int
pci_maptype(unsigned mapreg)
{
static u_int8_t maptype[0x10] = {
PCI_MAPMEM, PCI_MAPPORT,
PCI_MAPMEM, 0,
PCI_MAPMEM, PCI_MAPPORT,
0, 0,
PCI_MAPMEM|PCI_MAPMEMP, PCI_MAPPORT,
PCI_MAPMEM|PCI_MAPMEMP, 0,
PCI_MAPMEM|PCI_MAPMEMP, PCI_MAPPORT,
0, 0,
};
return maptype[mapreg & 0x0f];
}
/* return log2 of map size decoded for memory or port map */
static int
pci_mapsize(unsigned testval)
{
int ln2size;
testval = pci_mapbase(testval);
ln2size = 0;
if (testval != 0) {
while ((testval & 1) == 0)
{
ln2size++;
testval >>= 1;
}
}
return (ln2size);
}
/* return log2 of address range supported by map register */
static int
pci_maprange(unsigned mapreg)
{
int ln2range = 0;
switch (mapreg & 0x07) {
case 0x00:
case 0x01:
case 0x05:
ln2range = 32;
break;
case 0x02:
ln2range = 20;
break;
case 0x04:
ln2range = 64;
break;
}
return (ln2range);
}
/* adjust some values from PCI 1.0 devices to match 2.0 standards ... */
static void
pci_fixancient(pcicfgregs *cfg)
{
if (cfg->hdrtype != 0)
return;
/* PCI to PCI bridges use header type 1 */
if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI)
cfg->hdrtype = 1;
}
/* read config data specific to header type 1 device (PCI to PCI bridge) */
static void *
pci_readppb(device_t pcib, int b, int s, int f)
{
pcih1cfgregs *p;
p = malloc(sizeof (pcih1cfgregs), M_DEVBUF, M_WAITOK);
if (p == NULL)
return (NULL);
bzero(p, sizeof *p);
p->secstat = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_SECSTAT_1, 2);
p->bridgectl = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_BRIDGECTL_1, 2);
p->seclat = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_SECLAT_1, 1);
p->iobase = PCI_PPBIOBASE (PCIB_READ_CONFIG(pcib, b, s, f,
PCIR_IOBASEH_1, 2),
PCIB_READ_CONFIG(pcib, b, s, f,
PCIR_IOBASEL_1, 1));
p->iolimit = PCI_PPBIOLIMIT (PCIB_READ_CONFIG(pcib, b, s, f,
PCIR_IOLIMITH_1, 2),
PCIB_READ_CONFIG(pcib, b, s, f,
PCIR_IOLIMITL_1, 1));
p->membase = PCI_PPBMEMBASE (0,
PCIB_READ_CONFIG(pcib, b, s, f,
PCIR_MEMBASE_1, 2));
p->memlimit = PCI_PPBMEMLIMIT (0,
PCIB_READ_CONFIG(pcib, b, s, f,
PCIR_MEMLIMIT_1, 2));
p->pmembase = PCI_PPBMEMBASE (
(pci_addr_t)PCIB_READ_CONFIG(pcib, b, s, f, PCIR_PMBASEH_1, 4),
PCIB_READ_CONFIG(pcib, b, s, f, PCIR_PMBASEL_1, 2));
p->pmemlimit = PCI_PPBMEMLIMIT (
(pci_addr_t)PCIB_READ_CONFIG(pcib, b, s, f,
PCIR_PMLIMITH_1, 4),
PCIB_READ_CONFIG(pcib, b, s, f, PCIR_PMLIMITL_1, 2));
return (p);
}
/* read config data specific to header type 2 device (PCI to CardBus bridge) */
static void *
pci_readpcb(device_t pcib, int b, int s, int f)
{
pcih2cfgregs *p;
p = malloc(sizeof (pcih2cfgregs), M_DEVBUF, M_WAITOK);
if (p == NULL)
return (NULL);
bzero(p, sizeof *p);
p->secstat = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_SECSTAT_2, 2);
p->bridgectl = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_BRIDGECTL_2, 2);
p->seclat = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_SECLAT_2, 1);
p->membase0 = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_MEMBASE0_2, 4);
p->memlimit0 = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_MEMLIMIT0_2, 4);
p->membase1 = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_MEMBASE1_2, 4);
p->memlimit1 = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_MEMLIMIT1_2, 4);
p->iobase0 = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_IOBASE0_2, 4);
p->iolimit0 = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_IOLIMIT0_2, 4);
p->iobase1 = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_IOBASE1_2, 4);
p->iolimit1 = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_IOLIMIT1_2, 4);
p->pccardif = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_PCCARDIF_2, 4);
return p;
}
/* extract header type specific config data */
static void
pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg)
{
#define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
switch (cfg->hdrtype) {
case 0:
cfg->subvendor = REG(PCIR_SUBVEND_0, 2);
cfg->subdevice = REG(PCIR_SUBDEV_0, 2);
cfg->nummaps = PCI_MAXMAPS_0;
break;
case 1:
cfg->subvendor = REG(PCIR_SUBVEND_1, 2);
cfg->subdevice = REG(PCIR_SUBDEV_1, 2);
cfg->secondarybus = REG(PCIR_SECBUS_1, 1);
cfg->subordinatebus = REG(PCIR_SUBBUS_1, 1);
cfg->nummaps = PCI_MAXMAPS_1;
cfg->hdrspec = pci_readppb(pcib, b, s, f);
break;
case 2:
cfg->subvendor = REG(PCIR_SUBVEND_2, 2);
cfg->subdevice = REG(PCIR_SUBDEV_2, 2);
cfg->secondarybus = REG(PCIR_SECBUS_2, 1);
cfg->subordinatebus = REG(PCIR_SUBBUS_2, 1);
cfg->nummaps = PCI_MAXMAPS_2;
cfg->hdrspec = pci_readpcb(pcib, b, s, f);
break;
}
#undef REG
}
/* read configuration header into pcicfgrect structure */
static struct pci_devinfo *
pci_read_device(device_t pcib, int b, int s, int f)
{
#define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
pcicfgregs *cfg = NULL;
struct pci_devinfo *devlist_entry;
struct devlist *devlist_head;
devlist_head = &pci_devq;
devlist_entry = NULL;
if (PCIB_READ_CONFIG(pcib, b, s, f, PCIR_DEVVENDOR, 4) != -1) {
devlist_entry = malloc(sizeof(struct pci_devinfo),
M_DEVBUF, M_WAITOK);
if (devlist_entry == NULL)
return (NULL);
bzero(devlist_entry, sizeof *devlist_entry);
cfg = &devlist_entry->cfg;
cfg->bus = b;
cfg->slot = s;
cfg->func = f;
cfg->vendor = REG(PCIR_VENDOR, 2);
cfg->device = REG(PCIR_DEVICE, 2);
cfg->cmdreg = REG(PCIR_COMMAND, 2);
cfg->statreg = REG(PCIR_STATUS, 2);
cfg->baseclass = REG(PCIR_CLASS, 1);
cfg->subclass = REG(PCIR_SUBCLASS, 1);
cfg->progif = REG(PCIR_PROGIF, 1);
cfg->revid = REG(PCIR_REVID, 1);
cfg->hdrtype = REG(PCIR_HEADERTYPE, 1);
cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1);
cfg->lattimer = REG(PCIR_LATTIMER, 1);
cfg->intpin = REG(PCIR_INTPIN, 1);
cfg->intline = REG(PCIR_INTLINE, 1);
#ifdef __alpha__
alpha_platform_assign_pciintr(cfg);
#endif
#ifdef APIC_IO
if (cfg->intpin != 0) {
int airq;
airq = pci_apic_irq(cfg->bus, cfg->slot, cfg->intpin);
if (airq >= 0) {
/* PCI specific entry found in MP table */
if (airq != cfg->intline) {
undirect_pci_irq(cfg->intline);
cfg->intline = airq;
}
} else {
/*
* PCI interrupts might be redirected to the
* ISA bus according to some MP tables. Use the
* same methods as used by the ISA devices
* devices to find the proper IOAPIC int pin.
*/
airq = isa_apic_irq(cfg->intline);
if ((airq >= 0) && (airq != cfg->intline)) {
/* XXX: undirect_pci_irq() ? */
undirect_isa_irq(cfg->intline);
cfg->intline = airq;
}
}
}
#endif /* APIC_IO */
cfg->mingnt = REG(PCIR_MINGNT, 1);
cfg->maxlat = REG(PCIR_MAXLAT, 1);
cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0;
cfg->hdrtype &= ~PCIM_MFDEV;
pci_fixancient(cfg);
pci_hdrtypedata(pcib, b, s, f, cfg);
STAILQ_INSERT_TAIL(devlist_head, devlist_entry, pci_links);
devlist_entry->conf.pc_sel.pc_bus = cfg->bus;
devlist_entry->conf.pc_sel.pc_dev = cfg->slot;
devlist_entry->conf.pc_sel.pc_func = cfg->func;
devlist_entry->conf.pc_hdr = cfg->hdrtype;
devlist_entry->conf.pc_subvendor = cfg->subvendor;
devlist_entry->conf.pc_subdevice = cfg->subdevice;
devlist_entry->conf.pc_vendor = cfg->vendor;
devlist_entry->conf.pc_device = cfg->device;
devlist_entry->conf.pc_class = cfg->baseclass;
devlist_entry->conf.pc_subclass = cfg->subclass;
devlist_entry->conf.pc_progif = cfg->progif;
devlist_entry->conf.pc_revid = cfg->revid;
pci_numdevs++;
pci_generation++;
}
return (devlist_entry);
#undef REG
}
#if 0
/* free pcicfgregs structure and all depending data structures */
static int
pci_freecfg(struct pci_devinfo *dinfo)
{
struct devlist *devlist_head;
devlist_head = &pci_devq;
if (dinfo->cfg.hdrspec != NULL)
free(dinfo->cfg.hdrspec, M_DEVBUF);
if (dinfo->cfg.map != NULL)
free(dinfo->cfg.map, M_DEVBUF);
/* XXX this hasn't been tested */
STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links);
free(dinfo, M_DEVBUF);
/* increment the generation count */
pci_generation++;
/* we're losing one device */
pci_numdevs--;
return (0);
}
#endif
/*
* 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);
}
/*
* Locate the parent of a PCI device by scanning the PCI devlist
* and return the entry for the parent.
* For devices on PCI Bus 0 (the host bus), this is the PCI Host.
* For devices on secondary PCI busses, this is that bus' PCI-PCI Bridge.
*/
pcicfgregs *
pci_devlist_get_parent(pcicfgregs *cfg)
{
struct devlist *devlist_head;
struct pci_devinfo *dinfo;
pcicfgregs *bridge_cfg;
int i;
dinfo = STAILQ_FIRST(devlist_head = &pci_devq);
/* If the device is on PCI bus 0, look for the host */
if (cfg->bus == 0) {
for (i = 0; (dinfo != NULL) && (i < pci_numdevs);
dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
bridge_cfg = &dinfo->cfg;
if (bridge_cfg->baseclass == PCIC_BRIDGE
&& bridge_cfg->subclass == PCIS_BRIDGE_HOST
&& bridge_cfg->bus == cfg->bus) {
return bridge_cfg;
}
}
}
/* If the device is not on PCI bus 0, look for the PCI-PCI bridge */
if (cfg->bus > 0) {
for (i = 0; (dinfo != NULL) && (i < pci_numdevs);
dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
bridge_cfg = &dinfo->cfg;
if (bridge_cfg->baseclass == PCIC_BRIDGE
&& bridge_cfg->subclass == PCIS_BRIDGE_PCI
&& bridge_cfg->secondarybus == cfg->bus) {
return bridge_cfg;
}
}
}
return NULL;
}
static int
pci_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
{
device_t pci, pcib;
struct pci_io *io;
const char *name;
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,
(int)sizeof(struct pci_match_conf),
(int)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 (!useracc((caddr_t)cio->patterns,
cio->pat_buf_len, VM_PROT_READ)) {
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 (!useracc((caddr_t)cio->matches,
cio->match_buf_len, VM_PROT_WRITE)) {
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;
/* Populate pd_name and pd_unit */
name = NULL;
if (dinfo->cfg.dev && dinfo->conf.pd_name[0] == '\0')
name = device_get_name(dinfo->cfg.dev);
if (name) {
strncpy(dinfo->conf.pd_name, name,
sizeof(dinfo->conf.pd_name));
dinfo->conf.pd_name[PCI_MAXNAMELEN] = 0;
dinfo->conf.pd_unit =
device_get_unit(dinfo->cfg.dev);
}
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) {
case 4:
case 2:
case 1:
/*
* Assume that the user-level bus number is
* actually the pciN instance number. We map
* from that to the real pcib+bus combination.
*/
pci = devclass_get_device(pci_devclass,
io->pi_sel.pc_bus);
if (pci) {
int b = pcib_get_bus(pci);
pcib = device_get_parent(pci);
io->pi_data =
PCIB_READ_CONFIG(pcib,
b,
io->pi_sel.pc_dev,
io->pi_sel.pc_func,
io->pi_reg,
io->pi_width);
error = 0;
} else {
error = ENODEV;
}
break;
default:
error = ENODEV;
break;
}
break;
case PCIOCWRITE:
io = (struct pci_io *)data;
switch(io->pi_width) {
case 4:
case 2:
case 1:
/*
* Assume that the user-level bus number is
* actually the pciN instance number. We map
* from that to the real pcib+bus combination.
*/
pci = devclass_get_device(pci_devclass,
io->pi_sel.pc_bus);
if (pci) {
int b = pcib_get_bus(pci);
pcib = device_get_parent(pci);
PCIB_WRITE_CONFIG(pcib,
b,
io->pi_sel.pc_dev,
io->pi_sel.pc_func,
io->pi_reg,
io->pi_data,
io->pi_width);
error = 0;
} else {
error = ENODEV;
}
break;
default:
error = ENODEV;
break;
}
break;
default:
error = ENOTTY;
break;
}
return (error);
}
#define PCI_CDEV 78
static struct cdevsw pcicdev = {
/* open */ pci_open,
/* close */ pci_close,
/* read */ noread,
/* write */ nowrite,
/* ioctl */ pci_ioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "pci",
/* maj */ PCI_CDEV,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* bmaj */ -1
};
#include "pci_if.h"
/*
* New style pci driver. Parent device is either a pci-host-bridge or a
* pci-pci-bridge. Both kinds are represented by instances of pcib.
*/
static void
pci_print_verbose(struct pci_devinfo *dinfo)
{
if (bootverbose) {
pcicfgregs *cfg = &dinfo->cfg;
printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n",
cfg->vendor, cfg->device, cfg->revid);
printf("\tbus=%d, slot=%d, func=%d\n",
cfg->bus, cfg->slot, cfg->func);
printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n",
cfg->baseclass, cfg->subclass, cfg->progif,
cfg->hdrtype, cfg->mfdev);
printf("\tsubordinatebus=%x \tsecondarybus=%x\n",
cfg->subordinatebus, cfg->secondarybus);
#ifdef PCI_DEBUG
printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n",
cfg->cmdreg, cfg->statreg, cfg->cachelnsz);
printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n",
cfg->lattimer, cfg->lattimer * 30,
cfg->mingnt, cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250);
#endif /* PCI_DEBUG */
if (cfg->intpin > 0)
printf("\tintpin=%c, irq=%d\n", cfg->intpin +'a' -1, cfg->intline);
}
}
static int
pci_porten(device_t pcib, int b, int s, int f)
{
return (PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2)
& PCIM_CMD_PORTEN) != 0;
}
static int
pci_memen(device_t pcib, int b, int s, int f)
{
return (PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2)
& PCIM_CMD_MEMEN) != 0;
}
/*
* Add a resource based on a pci map register. Return 1 if the map
* register is a 32bit map register or 2 if it is a 64bit register.
*/
static int
pci_add_map(device_t pcib, int b, int s, int f, int reg,
struct resource_list *rl)
{
u_int32_t map;
u_int64_t base;
u_int8_t ln2size;
u_int8_t ln2range;
u_int32_t testval;
u_int16_t cmd;
int type;
map = PCIB_READ_CONFIG(pcib, b, s, f, reg, 4);
if (map == 0 || map == 0xffffffff)
return 1; /* skip invalid entry */
PCIB_WRITE_CONFIG(pcib, b, s, f, reg, 0xffffffff, 4);
testval = PCIB_READ_CONFIG(pcib, b, s, f, reg, 4);
PCIB_WRITE_CONFIG(pcib, b, s, f, reg, map, 4);
base = pci_mapbase(map);
if (pci_maptype(map) & PCI_MAPMEM)
type = SYS_RES_MEMORY;
else
type = SYS_RES_IOPORT;
ln2size = pci_mapsize(testval);
ln2range = pci_maprange(testval);
if (ln2range == 64) {
/* Read the other half of a 64bit map register */
base |= (u_int64_t) PCIB_READ_CONFIG(pcib, b, s, f, reg + 4, 4) << 32;
}
if (bootverbose) {
printf("\tmap[%02x]: type %x, range %2d, base %08x, size %2d",
reg, pci_maptype(map), ln2range,
(unsigned int) base, ln2size);
if (type == SYS_RES_IOPORT && !pci_porten(pcib, b, s, f))
printf(", port disabled\n");
else if (type == SYS_RES_MEMORY && !pci_memen(pcib, b, s, f))
printf(", memory disabled\n");
else
printf(", enabled\n");
}
/*
* This code theoretically does the right thing, but has
* undesirable side effects in some cases where
* peripherals respond oddly to having these bits
* enabled. Leave them alone by default.
*/
#ifdef PCI_ENABLE_IO_MODES
/* Turn on resources that have been left off by a lazy BIOS */
if (type == SYS_RES_IOPORT && !pci_porten(pcib, b, s, f)) {
cmd = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2);
cmd |= PCIM_CMD_PORTEN;
PCIB_WRITE_CONFIG(pcib, b, s, f, PCIR_COMMAND, cmd, 2);
}
if (type == SYS_RES_MEMORY && !pci_memen(pcib, b, s, f)) {
cmd = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2);
cmd |= PCIM_CMD_MEMEN;
PCIB_WRITE_CONFIG(pcib, b, s, f, PCIR_COMMAND, cmd, 2);
}
#else
if (type == SYS_RES_IOPORT && !pci_porten(cfg))
return 1;
if (type == SYS_RES_MEMORY && !pci_memen(cfg))
return 1;
#endif
resource_list_add(rl, type, reg,
base, base + (1 << ln2size) - 1,
(1 << ln2size));
return (ln2range == 64) ? 2 : 1;
}
static void
pci_add_resources(device_t pcib, int b, int s, int f, device_t dev)
{
struct pci_devinfo *dinfo = device_get_ivars(dev);
pcicfgregs *cfg = &dinfo->cfg;
struct resource_list *rl = &dinfo->resources;
struct pci_quirk *q;
int i;
for (i = 0; i < cfg->nummaps;) {
i += pci_add_map(pcib, b, s, f, PCIR_MAPS + i*4, rl);
}
for (q = &pci_quirks[0]; q->devid; q++) {
if (q->devid == ((cfg->device << 16) | cfg->vendor)
&& q->type == PCI_QUIRK_MAP_REG)
pci_add_map(pcib, b, s, f, q->arg1, rl);
}
if (cfg->intpin > 0 && cfg->intline != 255)
resource_list_add(rl, SYS_RES_IRQ, 0,
cfg->intline, cfg->intline, 1);
}
static void
pci_add_children(device_t dev, int busno)
{
device_t pcib = device_get_parent(dev);
int maxslots;
int s, f;
maxslots = PCIB_MAXSLOTS(pcib);
for (s = 0; s <= maxslots; s++) {
int pcifunchigh = 0;
for (f = 0; f <= pcifunchigh; f++) {
struct pci_devinfo *dinfo =
pci_read_device(pcib, busno, s, f);
if (dinfo != NULL) {
if (dinfo->cfg.mfdev)
pcifunchigh = 7;
pci_print_verbose(dinfo);
dinfo->cfg.dev = device_add_child(dev, NULL, -1);
device_set_ivars(dinfo->cfg.dev, dinfo);
pci_add_resources(pcib, busno, s, f,
dinfo->cfg.dev);
}
}
}
}
static int
pci_probe(device_t dev)
{
static int once, busno;
device_set_desc(dev, "PCI bus");
if (bootverbose)
device_printf(dev, "physical bus=%d\n", pcib_get_bus(dev));
/*
* Since there can be multiple independantly numbered PCI
* busses on some large alpha systems, we can't use the unit
* number to decide what bus we are probing. We ask the parent
* pcib what our bus number is.
*/
busno = pcib_get_bus(dev);
if (busno < 0)
return ENXIO;
pci_add_children(dev, busno);
if (!once) {
make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644, "pci");
once++;
}
return 0;
}
static int
pci_print_resources(struct resource_list *rl, const char *name, int type,
const char *format)
{
struct resource_list_entry *rle;
int printed, retval;
printed = 0;
retval = 0;
/* Yes, this is kinda cheating */
SLIST_FOREACH(rle, rl, link) {
if (rle->type == type) {
if (printed == 0)
retval += printf(" %s ", name);
else if (printed > 0)
retval += printf(",");
printed++;
retval += printf(format, rle->start);
if (rle->count > 1) {
retval += printf("-");
retval += printf(format, rle->start +
rle->count - 1);
}
}
}
return retval;
}
static int
pci_print_child(device_t dev, device_t child)
{
struct pci_devinfo *dinfo;
struct resource_list *rl;
pcicfgregs *cfg;
int retval = 0;
dinfo = device_get_ivars(child);
cfg = &dinfo->cfg;
rl = &dinfo->resources;
retval += bus_print_child_header(dev, child);
retval += pci_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx");
retval += pci_print_resources(rl, "mem", SYS_RES_MEMORY, "%#lx");
retval += pci_print_resources(rl, "irq", SYS_RES_IRQ, "%ld");
if (device_get_flags(dev))
retval += printf(" flags %#x", device_get_flags(dev));
retval += printf(" at device %d.%d", pci_get_slot(child),
pci_get_function(child));
retval += bus_print_child_footer(dev, child);
return (retval);
}
static void
pci_probe_nomatch(device_t dev, device_t child)
{
struct pci_devinfo *dinfo;
pcicfgregs *cfg;
const char *desc;
int unknown;
unknown = 0;
dinfo = device_get_ivars(child);
cfg = &dinfo->cfg;
desc = pci_ata_match(child);
if (!desc) desc = pci_usb_match(child);
if (!desc) desc = pci_vga_match(child);
if (!desc) desc = pci_chip_match(child);
if (!desc) {
desc = "unknown card";
unknown++;
}
device_printf(dev, "<%s>", desc);
if (bootverbose || unknown) {
printf(" (vendor=0x%04x, dev=0x%04x)",
cfg->vendor,
cfg->device);
}
printf(" at %d.%d",
pci_get_slot(child),
pci_get_function(child));
if (cfg->intpin > 0 && cfg->intline != 255) {
printf(" irq %d", cfg->intline);
}
printf("\n");
return;
}
static int
pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct pci_devinfo *dinfo;
pcicfgregs *cfg;
dinfo = device_get_ivars(child);
cfg = &dinfo->cfg;
switch (which) {
case PCI_IVAR_SUBVENDOR:
*result = cfg->subvendor;
break;
case PCI_IVAR_SUBDEVICE:
*result = cfg->subdevice;
break;
case PCI_IVAR_VENDOR:
*result = cfg->vendor;
break;
case PCI_IVAR_DEVICE:
*result = cfg->device;
break;
case PCI_IVAR_DEVID:
*result = (cfg->device << 16) | cfg->vendor;
break;
case PCI_IVAR_CLASS:
*result = cfg->baseclass;
break;
case PCI_IVAR_SUBCLASS:
*result = cfg->subclass;
break;
case PCI_IVAR_PROGIF:
*result = cfg->progif;
break;
case PCI_IVAR_REVID:
*result = cfg->revid;
break;
case PCI_IVAR_INTPIN:
*result = cfg->intpin;
break;
case PCI_IVAR_IRQ:
*result = cfg->intline;
break;
case PCI_IVAR_BUS:
*result = cfg->bus;
break;
case PCI_IVAR_SLOT:
*result = cfg->slot;
break;
case PCI_IVAR_FUNCTION:
*result = cfg->func;
break;
case PCI_IVAR_SECONDARYBUS:
*result = cfg->secondarybus;
break;
case PCI_IVAR_SUBORDINATEBUS:
*result = cfg->subordinatebus;
break;
default:
return ENOENT;
}
return 0;
}
static int
pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
struct pci_devinfo *dinfo;
pcicfgregs *cfg;
dinfo = device_get_ivars(child);
cfg = &dinfo->cfg;
switch (which) {
case PCI_IVAR_SUBVENDOR:
case PCI_IVAR_SUBDEVICE:
case PCI_IVAR_VENDOR:
case PCI_IVAR_DEVICE:
case PCI_IVAR_DEVID:
case PCI_IVAR_CLASS:
case PCI_IVAR_SUBCLASS:
case PCI_IVAR_PROGIF:
case PCI_IVAR_REVID:
case PCI_IVAR_INTPIN:
case PCI_IVAR_IRQ:
case PCI_IVAR_BUS:
case PCI_IVAR_SLOT:
case PCI_IVAR_FUNCTION:
return EINVAL; /* disallow for now */
case PCI_IVAR_SECONDARYBUS:
cfg->secondarybus = value;
break;
case PCI_IVAR_SUBORDINATEBUS:
cfg->subordinatebus = value;
break;
default:
return ENOENT;
}
return 0;
}
static struct resource *
pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct pci_devinfo *dinfo = device_get_ivars(child);
struct resource_list *rl = &dinfo->resources;
pcicfgregs *cfg = &dinfo->cfg;
/*
* Perform lazy resource allocation
*
* XXX add support here for SYS_RES_IOPORT and SYS_RES_MEMORY
*/
if (device_get_parent(child) == dev) {
if ((type == SYS_RES_IRQ) && (cfg->intline == 255)) {
#ifdef __i386__
cfg->intline = PCIB_ROUTE_INTERRUPT(
device_get_parent(dev), pci_get_slot(child),
cfg->intpin);
#endif /* __i386__ */
if (cfg->intline != 255) {
pci_write_config(child, PCIR_INTLINE, cfg->intline, 1);
resource_list_add(rl, SYS_RES_IRQ, 0,
cfg->intline, cfg->intline, 1);
}
}
}
return resource_list_alloc(rl, dev, child, type, rid,
start, end, count, flags);
}
static int
pci_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
struct pci_devinfo *dinfo = device_get_ivars(child);
struct resource_list *rl = &dinfo->resources;
return resource_list_release(rl, dev, child, type, rid, r);
}
static int
pci_set_resource(device_t dev, device_t child, int type, int rid,
u_long start, u_long count)
{
struct pci_devinfo *dinfo = device_get_ivars(child);
struct resource_list *rl = &dinfo->resources;
resource_list_add(rl, type, rid, start, start + count - 1, count);
return 0;
}
static int
pci_get_resource(device_t dev, device_t child, int type, int rid,
u_long *startp, u_long *countp)
{
struct pci_devinfo *dinfo = device_get_ivars(child);
struct resource_list *rl = &dinfo->resources;
struct resource_list_entry *rle;
rle = resource_list_find(rl, type, rid);
if (!rle)
return ENOENT;
if (startp)
*startp = rle->start;
if (countp)
*countp = rle->count;
return 0;
}
static void
pci_delete_resource(device_t dev, device_t child, int type, int rid)
{
printf("pci_delete_resource: PCI resources can not be deleted\n");
}
static u_int32_t
pci_read_config_method(device_t dev, device_t child, int reg, int width)
{
struct pci_devinfo *dinfo = device_get_ivars(child);
pcicfgregs *cfg = &dinfo->cfg;
return PCIB_READ_CONFIG(device_get_parent(dev),
cfg->bus, cfg->slot, cfg->func,
reg, width);
}
static void
pci_write_config_method(device_t dev, device_t child, int reg,
u_int32_t val, int width)
{
struct pci_devinfo *dinfo = device_get_ivars(child);
pcicfgregs *cfg = &dinfo->cfg;
PCIB_WRITE_CONFIG(device_get_parent(dev),
cfg->bus, cfg->slot, cfg->func,
reg, val, width);
}
static int
pci_modevent(module_t mod, int what, void *arg)
{
switch (what) {
case MOD_LOAD:
STAILQ_INIT(&pci_devq);
break;
case MOD_UNLOAD:
break;
}
return 0;
}
static device_method_t pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, pci_probe),
DEVMETHOD(device_attach, bus_generic_attach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, pci_print_child),
DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
DEVMETHOD(bus_read_ivar, pci_read_ivar),
DEVMETHOD(bus_write_ivar, pci_write_ivar),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
DEVMETHOD(bus_release_resource, pci_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_set_resource, pci_set_resource),
DEVMETHOD(bus_get_resource, pci_get_resource),
DEVMETHOD(bus_delete_resource, pci_delete_resource),
/* PCI interface */
DEVMETHOD(pci_read_config, pci_read_config_method),
DEVMETHOD(pci_write_config, pci_write_config_method),
{ 0, 0 }
};
static driver_t pci_driver = {
"pci",
pci_methods,
1, /* no softc */
};
DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, 0);
DRIVER_MODULE(pci, acpi_pcib, pci_driver, pci_devclass, pci_modevent, 0);
Reference in New Issue View Git Blame Copy Permalink