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freebsd-skq/sys/dev/pci/pci.c

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/*
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
* Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
* Copyright (c) 2000, BSDi
* 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_pci.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/linker.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 <sys/pciio.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pci_private.h>
#include "pcib_if.h"
#include "pci_if.h"
static u_int32_t pci_mapbase(unsigned mapreg);
static int pci_maptype(unsigned mapreg);
static int pci_mapsize(unsigned testval);
static int pci_maprange(unsigned mapreg);
static void pci_fixancient(pcicfgregs *cfg);
static void pci_hdrtypedata(device_t pcib, int b, int s, int f,
pcicfgregs *cfg);
static void pci_read_extcap(device_t pcib, pcicfgregs *cfg);
static int pci_porten(device_t pcib, int b, int s, int f);
static int pci_memen(device_t pcib, int b, int s, int f);
static int pci_add_map(device_t pcib, int b, int s, int f, int reg,
struct resource_list *rl);
static void pci_add_resources(device_t pcib, int b, int s, int f,
device_t dev);
static void pci_add_children(device_t dev, int busno);
static int pci_probe(device_t dev);
static int pci_describe_parse_line(char **ptr, int *vendor,
int *device, char **desc);
static char *pci_describe_device(device_t dev);
static int pci_modevent(module_t mod, int what, void *arg);
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_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
DEVMETHOD(bus_delete_resource, pci_delete_resource),
DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
/* PCI interface */
DEVMETHOD(pci_read_config, pci_read_config_method),
DEVMETHOD(pci_write_config, pci_write_config_method),
DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
DEVMETHOD(pci_enable_io, pci_enable_io_method),
DEVMETHOD(pci_disable_io, pci_disable_io_method),
DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method),
{ 0, 0 }
};
static driver_t pci_driver = {
"pci",
pci_methods,
0, /* no softc */
};
static devclass_t pci_devclass;
DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, 0);
DRIVER_MODULE(pci, acpi_pcib, pci_driver, pci_devclass, pci_modevent, 0);
MODULE_VERSION(pci, 1);
static char *pci_vendordata;
static size_t pci_vendordata_size;
struct pci_quirk {
u_int32_t devid; /* Vendor/device of the card */
int type;
#define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */
int arg1;
int arg2;
};
struct pci_quirk pci_quirks[] = {
/* The Intel 82371AB and 82443MX has a map register at offset 0x90. */
{ 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 },
{ 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 },
/* As does the Serverworks OSB4 (the SMBus mapping register) */
{ 0x02001166, 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 */
struct devlist pci_devq;
u_int32_t pci_generation;
u_int32_t pci_numdevs = 0;
/* Find a device_t by bus/slot/function */
device_t
pci_find_bsf (u_int8_t bus, u_int8_t slot, u_int8_t func)
{
struct pci_devinfo *dinfo;
STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
if ((dinfo->cfg.bus == bus) &&
(dinfo->cfg.slot == slot) &&
(dinfo->cfg.func == func)) {
return (dinfo->cfg.dev);
}
}
return (NULL);
}
/* Find a device_t by vendor/device ID */
device_t
pci_find_device (u_int16_t vendor, u_int16_t device)
{
struct pci_devinfo *dinfo;
STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
if ((dinfo->cfg.vendor == vendor) &&
(dinfo->cfg.device == device)) {
return (dinfo->cfg.dev);
}
}
return (NULL);
}
/* 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;
}
/* 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->nummaps = PCI_MAXMAPS_1;
break;
case 2:
cfg->subvendor = REG(PCIR_SUBVEND_2, 2);
cfg->subdevice = REG(PCIR_SUBDEV_2, 2);
cfg->nummaps = PCI_MAXMAPS_2;
break;
}
#undef REG
}
/* read configuration header into pcicfgregs structure */
struct pci_devinfo *
pci_read_device(device_t pcib, int b, int s, int f, size_t size)
{
#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(size, M_DEVBUF, M_WAITOK | M_ZERO);
if (devlist_entry == NULL)
return (NULL);
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);
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);
if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT)
pci_read_extcap(pcib, 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
}
static void
pci_read_extcap(device_t pcib, pcicfgregs *cfg)
{
#define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w)
int ptr, nextptr, ptrptr;
switch (cfg->hdrtype) {
case 0:
ptrptr = 0x34;
break;
case 2:
ptrptr = 0x14;
break;
default:
return; /* no extended capabilities support */
}
nextptr = REG(ptrptr, 1); /* sanity check? */
/*
* Read capability entries.
*/
while (nextptr != 0) {
/* Sanity check */
if (nextptr > 255) {
printf("illegal PCI extended capability offset %d\n",
nextptr);
return;
}
/* Find the next entry */
ptr = nextptr;
nextptr = REG(ptr + 1, 1);
/* Process this entry */
switch (REG(ptr, 1)) {
case 0x01: /* PCI power management */
if (cfg->pp_cap == 0) {
cfg->pp_cap = REG(ptr + PCIR_POWER_CAP, 2);
cfg->pp_status = ptr + PCIR_POWER_STATUS;
cfg->pp_pmcsr = ptr + PCIR_POWER_PMCSR;
if ((nextptr - ptr) > PCIR_POWER_DATA)
cfg->pp_data = ptr + PCIR_POWER_DATA;
}
break;
default:
break;
}
}
#undef REG
}
/* free pcicfgregs structure and all depending data structures */
int
pci_freecfg(struct pci_devinfo *dinfo)
{
struct devlist *devlist_head;
devlist_head = &pci_devq;
/* 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);
}
/*
* PCI power manangement
*/
int
pci_set_powerstate_method(device_t dev, device_t child, int state)
{
struct pci_devinfo *dinfo = device_get_ivars(child);
pcicfgregs *cfg = &dinfo->cfg;
u_int16_t status;
int result;
if (cfg->pp_cap != 0) {
status = PCI_READ_CONFIG(dev, child, cfg->pp_status, 2) & ~PCIM_PSTAT_DMASK;
result = 0;
switch (state) {
case PCI_POWERSTATE_D0:
status |= PCIM_PSTAT_D0;
break;
case PCI_POWERSTATE_D1:
if (cfg->pp_cap & PCIM_PCAP_D1SUPP) {
status |= PCIM_PSTAT_D1;
} else {
result = EOPNOTSUPP;
}
break;
case PCI_POWERSTATE_D2:
if (cfg->pp_cap & PCIM_PCAP_D2SUPP) {
status |= PCIM_PSTAT_D2;
} else {
result = EOPNOTSUPP;
}
break;
case PCI_POWERSTATE_D3:
status |= PCIM_PSTAT_D3;
break;
default:
result = EINVAL;
}
if (result == 0)
PCI_WRITE_CONFIG(dev, child, cfg->pp_status, status, 2);
} else {
result = ENXIO;
}
return(result);
}
int
pci_get_powerstate_method(device_t dev, device_t child)
{
struct pci_devinfo *dinfo = device_get_ivars(child);
pcicfgregs *cfg = &dinfo->cfg;
u_int16_t status;
int result;
if (cfg->pp_cap != 0) {
status = PCI_READ_CONFIG(dev, child, cfg->pp_status, 2);
switch (status & PCIM_PSTAT_DMASK) {
case PCIM_PSTAT_D0:
result = PCI_POWERSTATE_D0;
break;
case PCIM_PSTAT_D1:
result = PCI_POWERSTATE_D1;
break;
case PCIM_PSTAT_D2:
result = PCI_POWERSTATE_D2;
break;
case PCIM_PSTAT_D3:
result = PCI_POWERSTATE_D3;
break;
default:
result = PCI_POWERSTATE_UNKNOWN;
break;
}
} else {
/* No support, device is always at D0 */
result = PCI_POWERSTATE_D0;
}
return(result);
}
/*
* Some convenience functions for PCI device drivers.
*/
static __inline void
pci_set_command_bit(device_t dev, device_t child, u_int16_t bit)
{
u_int16_t command;
command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
command |= bit;
PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
}
static __inline void
pci_clear_command_bit(device_t dev, device_t child, u_int16_t bit)
{
u_int16_t command;
command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
command &= ~bit;
PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
}
void
pci_enable_busmaster_method(device_t dev, device_t child)
{
pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
}
void
pci_disable_busmaster_method(device_t dev, device_t child)
{
pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
}
void
pci_enable_io_method(device_t dev, device_t child, int space)
{
switch(space) {
case SYS_RES_IOPORT:
pci_set_command_bit(dev, child, PCIM_CMD_PORTEN);
break;
case SYS_RES_MEMORY:
pci_set_command_bit(dev, child, PCIM_CMD_MEMEN);
break;
}
}
void
pci_disable_io_method(device_t dev, device_t child, int space)
{
switch(space) {
case SYS_RES_IOPORT:
pci_clear_command_bit(dev, child, PCIM_CMD_PORTEN);
break;
case SYS_RES_MEMORY:
pci_clear_command_bit(dev, child, PCIM_CMD_MEMEN);
break;
}
}
/*
* 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.
*/
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);
#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);
if (cfg->pp_cap) {
u_int16_t status;
status = pci_read_config(cfg->dev, cfg->pp_status, 2);
printf("\tpowerspec %d supports D0%s%s D3 current D%d\n",
cfg->pp_cap & PCIM_PCAP_SPEC,
cfg->pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "",
cfg->pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "",
status & PCIM_PSTAT_DMASK);
}
}
}
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;
#ifdef PCI_ENABLE_IO_MODES
u_int16_t cmd;
#endif
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(pcib, b, s, f))
return (1);
if (type == SYS_RES_MEMORY && !pci_memen(pcib, b, s, f))
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 && PCI_INTERRUPT_VALID(cfg->intline)) {
#ifdef __ia64__
/*
* Re-route interrupts on ia64 so that we can get the
* I/O SAPIC interrupt numbers (the BIOS leaves legacy
* PIC interrupt numbers in the intline registers).
*/
cfg->intline = PCIB_ROUTE_INTERRUPT(pcib, dev, cfg->intpin);
#endif
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, sizeof(struct pci_devinfo));
if (dinfo != NULL) {
if (dinfo->cfg.mfdev)
pcifunchigh = PCI_FUNCMAX;
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);
pci_print_verbose(dinfo);
}
}
}
}
static int
pci_probe(device_t dev)
{
static int once, busno;
caddr_t vendordata, info;
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");
if ((vendordata = preload_search_by_type("pci_vendor_data"))
!= NULL) {
info = preload_search_info(vendordata, MODINFO_ADDR);
pci_vendordata = *(char **)info;
info = preload_search_info(vendordata, MODINFO_SIZE);
pci_vendordata_size = *(size_t *)info;
/* terminate the database */
pci_vendordata[pci_vendordata_size] = '\n';
}
once++;
}
return (0);
}
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 += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
retval += resource_list_print_type(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 struct
{
int class;
int subclass;
char *desc;
} pci_nomatch_tab[] = {
{PCIC_OLD, -1, "old"},
{PCIC_OLD, PCIS_OLD_NONVGA, "non-VGA display device"},
{PCIC_OLD, PCIS_OLD_VGA, "VGA-compatible display device"},
{PCIC_STORAGE, -1, "mass storage"},
{PCIC_STORAGE, PCIS_STORAGE_SCSI, "SCSI"},
{PCIC_STORAGE, PCIS_STORAGE_IDE, "ATA"},
{PCIC_STORAGE, PCIS_STORAGE_FLOPPY, "floppy disk"},
{PCIC_STORAGE, PCIS_STORAGE_IPI, "IPI"},
{PCIC_STORAGE, PCIS_STORAGE_RAID, "RAID"},
{PCIC_NETWORK, -1, "network"},
{PCIC_NETWORK, PCIS_NETWORK_ETHERNET, "ethernet"},
{PCIC_NETWORK, PCIS_NETWORK_TOKENRING, "token ring"},
{PCIC_NETWORK, PCIS_NETWORK_FDDI, "fddi"},
{PCIC_NETWORK, PCIS_NETWORK_ATM, "ATM"},
{PCIC_DISPLAY, -1, "display"},
{PCIC_DISPLAY, PCIS_DISPLAY_VGA, "VGA"},
{PCIC_DISPLAY, PCIS_DISPLAY_XGA, "XGA"},
{PCIC_MULTIMEDIA, -1, "multimedia"},
{PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, "video"},
{PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, "audio"},
{PCIC_MEMORY, -1, "memory"},
{PCIC_MEMORY, PCIS_MEMORY_RAM, "RAM"},
{PCIC_MEMORY, PCIS_MEMORY_FLASH, "flash"},
{PCIC_BRIDGE, -1, "bridge"},
{PCIC_BRIDGE, PCIS_BRIDGE_HOST, "HOST-PCI"},
{PCIC_BRIDGE, PCIS_BRIDGE_ISA, "PCI-ISA"},
{PCIC_BRIDGE, PCIS_BRIDGE_EISA, "PCI-EISA"},
{PCIC_BRIDGE, PCIS_BRIDGE_MCA, "PCI-MCA"},
{PCIC_BRIDGE, PCIS_BRIDGE_PCI, "PCI-PCI"},
{PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, "PCI-PCMCIA"},
{PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, "PCI-NuBus"},
{PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, "PCI-CardBus"},
{PCIC_BRIDGE, PCIS_BRIDGE_OTHER, "PCI-unknown"},
{PCIC_SIMPLECOMM, -1, "simple comms"},
{PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, "UART"}, /* could detect 16550 */
{PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, "parallel port"},
{PCIC_BASEPERIPH, -1, "base peripheral"},
{PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, "interrupt controller"},
{PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, "DMA controller"},
{PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, "timer"},
{PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, "realtime clock"},
{PCIC_INPUTDEV, -1, "input device"},
{PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, "keyboard"},
{PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,"digitizer"},
{PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, "mouse"},
{PCIC_DOCKING, -1, "docking station"},
{PCIC_PROCESSOR, -1, "processor"},
{PCIC_SERIALBUS, -1, "serial bus"},
{PCIC_SERIALBUS, PCIS_SERIALBUS_FW, "FireWire"},
{PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, "AccessBus"},
{PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, "SSA"},
{PCIC_SERIALBUS, PCIS_SERIALBUS_USB, "USB"},
{PCIC_SERIALBUS, PCIS_SERIALBUS_FC, "Fibre Channel"},
{PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, "SMBus"},
{0, 0, NULL}
};
void
pci_probe_nomatch(device_t dev, device_t child)
{
int i;
char *cp, *scp, *device;
/*
* Look for a listing for this device in a loaded device database.
*/
if ((device = pci_describe_device(child)) != NULL) {
device_printf(dev, "<%s>", device);
free(device, M_DEVBUF);
} else {
/*
* Scan the class/subclass descriptions for a general
* description.
*/
cp = "unknown";
scp = NULL;
for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
if (pci_nomatch_tab[i].class == pci_get_class(child)) {
if (pci_nomatch_tab[i].subclass == -1) {
cp = pci_nomatch_tab[i].desc;
} else if (pci_nomatch_tab[i].subclass ==
pci_get_subclass(child)) {
scp = pci_nomatch_tab[i].desc;
}
}
}
device_printf(dev, "<%s%s%s>",
cp ? : "", ((cp != NULL) && (scp != NULL)) ? ", " : "",
scp ? : "");
}
printf(" at device %d.%d (no driver attached)\n",
pci_get_slot(child), pci_get_function(child));
return;
}
/*
* Parse the PCI device database, if loaded, and return a pointer to a
* description of the device.
*
* The database is flat text formatted as follows:
*
* Any line not in a valid format is ignored.
* Lines are terminated with newline '\n' characters.
*
* A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then
* the vendor name.
*
* A DEVICE line is entered immediately below the corresponding VENDOR ID.
* - devices cannot be listed without a corresponding VENDOR line.
* A DEVICE line consists of a TAB, the 4 digit (hex) device code,
* another TAB, then the device name.
*/
/*
* Assuming (ptr) points to the beginning of a line in the database,
* return the vendor or device and description of the next entry.
* The value of (vendor) or (device) inappropriate for the entry type
* is set to -1. Returns nonzero at the end of the database.
*
* Note that this is slightly unrobust in the face of corrupt data;
* we attempt to safeguard against this by spamming the end of the
* database with a newline when we initialise.
*/
static int
pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc)
{
char *cp = *ptr;
int left;
*device = -1;
*vendor = -1;
**desc = '\0';
for (;;) {
left = pci_vendordata_size - (cp - pci_vendordata);
if (left <= 0) {
*ptr = cp;
return(1);
}
/* vendor entry? */
if (*cp != '\t' &&
sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2)
break;
/* device entry? */
if (*cp == '\t' &&
sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2)
break;
/* skip to next line */
while (*cp != '\n' && left > 0) {
cp++;
left--;
}
if (*cp == '\n') {
cp++;
left--;
}
}
/* skip to next line */
while (*cp != '\n' && left > 0) {
cp++;
left--;
}
if (*cp == '\n' && left > 0)
cp++;
*ptr = cp;
return(0);
}
static char *
pci_describe_device(device_t dev)
{
int vendor, device;
char *desc, *vp, *dp, *line;
desc = vp = dp = NULL;
/*
* If we have no vendor data, we can't do anything.
*/
if (pci_vendordata == NULL)
goto out;
/*
* Scan the vendor data looking for this device
*/
line = pci_vendordata;
if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
goto out;
for (;;) {
if (pci_describe_parse_line(&line, &vendor, &device, &vp))
goto out;
if (vendor == pci_get_vendor(dev))
break;
}
if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
goto out;
for (;;) {
if (pci_describe_parse_line(&line, &vendor, &device, &dp)) {
*dp = 0;
break;
}
if (vendor != -1) {
*dp = 0;
break;
}
if (device == pci_get_device(dev))
break;
}
if (dp[0] == '\0')
snprintf(dp, 80, "0x%x", pci_get_device(dev));
if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) !=
NULL)
sprintf(desc, "%s, %s", vp, dp);
out:
if (vp != NULL)
free(vp, M_DEVBUF);
if (dp != NULL)
free(dp, M_DEVBUF);
return(desc);
}
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;
default:
return (ENOENT);
}
return (0);
}
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 */
default:
return (ENOENT);
}
return (0);
}
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 device doesn't have an interrupt routed, and is
* deserving of an interrupt, try to assign it one.
*/
if ((type == SYS_RES_IRQ) &&
!PCI_INTERRUPT_VALID(cfg->intline) &&
(cfg->intpin != 0)) {
cfg->intline = PCIB_ROUTE_INTERRUPT(
device_get_parent(dev), child, cfg->intpin);
if (PCI_INTERRUPT_VALID(cfg->intline)) {
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));
}
void
pci_delete_resource(device_t dev, device_t child, int type, int rid)
{
struct pci_devinfo *dinfo;
struct resource_list *rl;
struct resource_list_entry *rle;
if (device_get_parent(child) != dev)
return;
dinfo = device_get_ivars(child);
rl = &dinfo->resources;
rle = resource_list_find(rl, type, rid);
if (rle) {
if (rle->res) {
if (rle->res->r_dev != dev ||
rman_get_flags(rle->res) & RF_ACTIVE) {
device_printf(dev, "delete_resource: "
"Resource still owned by child, oops. "
"(type=%d, rid=%d, addr=%lx)\n",
rle->type, rle->rid,
rman_get_start(rle->res));
return;
}
bus_release_resource(dev, type, rid, rle->res);
}
resource_list_delete(rl, type, rid);
}
/*
* Why do we turn off the PCI configuration BAR when we delete a
* resource? -- imp
*/
pci_write_config(child, rid, 0, 4);
BUS_DELETE_RESOURCE(device_get_parent(dev), child, type, rid);
}
struct resource_list *
pci_get_resource_list (device_t dev, device_t child)
{
struct pci_devinfo * dinfo = device_get_ivars(child);
struct resource_list * rl = &dinfo->resources;
if (!rl)
return (NULL);
return (rl);
}
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));
}
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);
pci_generation = 0;
break;
case MOD_UNLOAD:
break;
}
return (0);
}
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