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xenocara/xserver/hw/xfree86/common/xf86pciBus.c

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/*
* Copyright (c) 1997-2003 by The XFree86 Project, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of the copyright holder(s)
* and author(s) shall not be used in advertising or otherwise to promote
* the sale, use or other dealings in this Software without prior written
* authorization from the copyright holder(s) and author(s).
*/
/*
* This file contains the interfaces to the bus-specific code
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <X11/X.h>
#include <pciaccess.h>
#include "os.h"
#include "Pci.h"
#include "xf86.h"
#include "xf86Priv.h"
/* Bus-specific headers */
#include "xf86Bus.h"
#define XF86_OS_PRIVS
#include "xf86_OSproc.h"
/* Bus-specific globals */
Bool pciSlotClaimed = FALSE;
#define PCIINFOCLASSES(c) \
( (((c) & 0x00ff0000) == (PCI_CLASS_PREHISTORIC << 16)) \
|| (((c) & 0x00ff0000) == (PCI_CLASS_DISPLAY << 16)) \
|| ((((c) & 0x00ffff00) \
== ((PCI_CLASS_MULTIMEDIA << 16) | (PCI_SUBCLASS_MULTIMEDIA_VIDEO << 8)))) \
|| ((((c) & 0x00ffff00) \
== ((PCI_CLASS_PROCESSOR << 16) | (PCI_SUBCLASS_PROCESSOR_COPROC << 8)))) )
/*
* PCI classes that have messages printed always. The others are only
* have a message printed when the vendor/dev IDs are recognised.
*/
#define PCIALWAYSPRINTCLASSES(c) \
( (((c) & 0x00ffff00) \
== ((PCI_CLASS_PREHISTORIC << 16) | (PCI_SUBCLASS_PREHISTORIC_VGA << 8))) \
|| (((c) & 0x00ff0000) == (PCI_CLASS_DISPLAY << 16)) \
|| ((((c) & 0x00ffff00) \
== ((PCI_CLASS_MULTIMEDIA << 16) | (PCI_SUBCLASS_MULTIMEDIA_VIDEO << 8)))) )
#define IS_VGA(c) \
(((c) & 0x00ffff00) \
== ((PCI_CLASS_DISPLAY << 16) | (PCI_SUBCLASS_DISPLAY_VGA << 8)))
void
xf86FormatPciBusNumber(int busnum, char *buffer)
{
/* 'buffer' should be at least 8 characters long */
if (busnum < 256)
sprintf(buffer, "%d", busnum);
else
sprintf(buffer, "%d@%d", busnum & 0x00ff, busnum >> 8);
}
/*
* xf86Bus.c interface
*/
void
xf86PciProbe(void)
{
int i = 0, k;
int num = 0;
struct pci_device *info;
struct pci_device_iterator *iter;
struct pci_device ** xf86PciVideoInfo = NULL;
if (!xf86scanpci()) {
xf86PciVideoInfo = NULL;
return;
}
iter = pci_slot_match_iterator_create(& xf86IsolateDevice);
while ((info = pci_device_next(iter)) != NULL) {
if (PCIINFOCLASSES(info->device_class)) {
num++;
xf86PciVideoInfo = xnfrealloc(xf86PciVideoInfo,
(sizeof(struct pci_device *)
* (num + 1)));
xf86PciVideoInfo[num] = NULL;
xf86PciVideoInfo[num - 1] = info;
pci_device_probe(info);
#ifdef HAVE_PCI_DEVICE_IS_BOOT_VGA
if (pci_device_is_boot_vga(info)) {
primaryBus.type = BUS_PCI;
primaryBus.id.pci = info;
}
#endif
info->user_data = 0;
}
}
free(iter);
/* If we haven't found a primary device try a different heuristic */
if (primaryBus.type == BUS_NONE && num) {
for (i = 0; i < num; i++) {
uint16_t command;
info = xf86PciVideoInfo[i];
pci_device_cfg_read_u16(info, & command, 4);
if ((command & PCI_CMD_MEM_ENABLE)
&& ((num == 1) || IS_VGA(info->device_class))) {
if (primaryBus.type == BUS_NONE) {
primaryBus.type = BUS_PCI;
primaryBus.id.pci = info;
} else {
xf86Msg(X_NOTICE,
"More than one possible primary device found\n");
primaryBus.type ^= (BusType)(-1);
}
}
}
}
/* Print a summary of the video devices found */
for (k = 0; k < num; k++) {
const char *vendorname = NULL, *chipname = NULL;
const char *prim = " ";
Bool memdone = FALSE, iodone = FALSE;
info = xf86PciVideoInfo[k];
vendorname = pci_device_get_vendor_name( info );
chipname = pci_device_get_device_name( info );
if ((!vendorname || !chipname) &&
!PCIALWAYSPRINTCLASSES(info->device_class))
continue;
if (xf86IsPrimaryPci(info))
prim = "*";
xf86Msg(X_PROBED, "PCI:%s(%u:%u:%u:%u) %04x:%04x:%04x:%04x ", prim,
info->domain, info->bus, info->dev, info->func,
info->vendor_id, info->device_id,
info->subvendor_id, info->subdevice_id);
if (vendorname)
xf86ErrorF("%s ", vendorname);
if (chipname)
xf86ErrorF("%s ", chipname);
xf86ErrorF("rev %d", info->revision);
for (i = 0; i < 6; i++) {
struct pci_mem_region * r = & info->regions[i];
if ( r->size && ! r->is_IO ) {
if (!memdone) {
xf86ErrorF(", Mem @ ");
memdone = TRUE;
} else
xf86ErrorF(", ");
xf86ErrorF("0x%08lx/%ld", (long)r->base_addr, (long)r->size);
}
}
for (i = 0; i < 6; i++) {
struct pci_mem_region * r = & info->regions[i];
if ( r->size && r->is_IO ) {
if (!iodone) {
xf86ErrorF(", I/O @ ");
iodone = TRUE;
} else
xf86ErrorF(", ");
xf86ErrorF("0x%08lx/%ld", (long)r->base_addr, (long)r->size);
}
}
if ( info->rom_size ) {
xf86ErrorF(", BIOS @ 0x\?\?\?\?\?\?\?\?/%ld", (long)info->rom_size);
}
xf86ErrorF("\n");
}
xfree(xf86PciVideoInfo);
}
/*
* If the slot requested is already in use, return -1.
* Otherwise, claim the slot for the screen requesting it.
*/
int
xf86ClaimPciSlot(struct pci_device * d, DriverPtr drvp,
int chipset, GDevPtr dev, Bool active)
{
EntityPtr p = NULL;
int num;
if (xf86CheckPciSlot(d)) {
num = xf86AllocateEntity();
p = xf86Entities[num];
p->driver = drvp;
p->chipset = chipset;
p->bus.type = BUS_PCI;
p->bus.id.pci = d;
p->active = active;
p->inUse = FALSE;
if (dev)
xf86AddDevToEntity(num, dev);
pciSlotClaimed = TRUE;
if (active) {
/* Map in this domain's I/O space */
p->domainIO = xf86MapLegacyIO(d);
}
return num;
} else
return -1;
}
/*
* Unclaim PCI slot, e.g. if probing failed, so that a different driver can claim.
*/
void
xf86UnclaimPciSlot(struct pci_device *d)
{
int i;
for (i = 0; i < xf86NumEntities; i++) {
const EntityPtr p = xf86Entities[i];
if ((p->bus.type == BUS_PCI) && (p->bus.id.pci == d)) {
/* Probably the slot should be deallocated? */
p->bus.type = BUS_NONE;
return;
}
}
}
/*
* Parse a BUS ID string, and return the PCI bus parameters if it was
* in the correct format for a PCI bus id.
*/
Bool
xf86ParsePciBusString(const char *busID, int *bus, int *device, int *func)
{
/*
* The format is assumed to be "bus[@domain]:device[:func]", where domain,
* bus, device and func are decimal integers. domain and func may be
* omitted and assumed to be zero, although doing this isn't encouraged.
*/
char *p, *s, *d;
const char *id;
int i;
if (StringToBusType(busID, &id) != BUS_PCI)
return FALSE;
s = xstrdup(id);
p = strtok(s, ":");
if (p == NULL || *p == 0) {
xfree(s);
return FALSE;
}
d = strpbrk(p, "@");
if (d != NULL) {
*(d++) = 0;
for (i = 0; d[i] != 0; i++) {
if (!isdigit(d[i])) {
xfree(s);
return FALSE;
}
}
}
for (i = 0; p[i] != 0; i++) {
if (!isdigit(p[i])) {
xfree(s);
return FALSE;
}
}
*bus = atoi(p);
if (d != NULL && *d != 0)
*bus += atoi(d) << 8;
p = strtok(NULL, ":");
if (p == NULL || *p == 0) {
xfree(s);
return FALSE;
}
for (i = 0; p[i] != 0; i++) {
if (!isdigit(p[i])) {
xfree(s);
return FALSE;
}
}
*device = atoi(p);
*func = 0;
p = strtok(NULL, ":");
if (p == NULL || *p == 0) {
xfree(s);
return TRUE;
}
for (i = 0; p[i] != 0; i++) {
if (!isdigit(p[i])) {
xfree(s);
return FALSE;
}
}
*func = atoi(p);
xfree(s);
return TRUE;
}
/*
* Compare a BUS ID string with a PCI bus id. Return TRUE if they match.
*/
Bool
xf86ComparePciBusString(const char *busID, int bus, int device, int func)
{
int ibus, idevice, ifunc;
if (xf86ParsePciBusString(busID, &ibus, &idevice, &ifunc)) {
return bus == ibus && device == idevice && func == ifunc;
} else {
return FALSE;
}
}
/*
* xf86IsPrimaryPci() -- return TRUE if primary device
* is PCI and bus, dev and func numbers match.
*/
Bool
xf86IsPrimaryPci(struct pci_device *pPci)
{
return ((primaryBus.type == BUS_PCI) && (pPci == primaryBus.id.pci));
}
/*
* xf86GetPciInfoForEntity() -- Get the pciVideoRec of entity.
*/
struct pci_device *
xf86GetPciInfoForEntity(int entityIndex)
{
EntityPtr p;
if (entityIndex >= xf86NumEntities)
return NULL;
p = xf86Entities[entityIndex];
return (p->bus.type == BUS_PCI) ? p->bus.id.pci : NULL;
}
/*
* xf86CheckPciMemBase() checks that the memory base value matches one of the
* PCI base address register values for the given PCI device.
*/
Bool
xf86CheckPciMemBase( struct pci_device * pPci, memType base )
{
int i;
for (i = 0; i < 6; i++)
if (base == pPci->regions[i].base_addr)
return TRUE;
return FALSE;
}
/*
* Check if the slot requested is free. If it is already in use, return FALSE.
*/
Bool
xf86CheckPciSlot(const struct pci_device *d)
{
int i;
for (i = 0; i < xf86NumEntities; i++) {
const EntityPtr p = xf86Entities[i];
if ((p->bus.type == BUS_PCI) && (p->bus.id.pci == d)) {
return FALSE;
}
}
return TRUE;
}
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