Commit c8ef0212 authored by Linus Torvalds's avatar Linus Torvalds

Manual merge of VIA tweak diffs

parents 79918bec cf2b08f7
...@@ -10,7 +10,7 @@ ...@@ -10,7 +10,7 @@
.S.o: .S.o:
$(CC) $(AFLAGS) -traditional -c $< -o $*.o $(CC) $(AFLAGS) -traditional -c $< -o $*.o
all: kernel.o head.o init_task.o all: first_rule kernel.o head.o init_task.o
O_TARGET := kernel.o O_TARGET := kernel.o
...@@ -18,19 +18,9 @@ export-objs := mca.o mtrr.o msr.o cpuid.o microcode.o i386_ksyms.o time.o ...@@ -18,19 +18,9 @@ export-objs := mca.o mtrr.o msr.o cpuid.o microcode.o i386_ksyms.o time.o
obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \ obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \
ptrace.o i8259.o ioport.o ldt.o setup.o time.o sys_i386.o \ ptrace.o i8259.o ioport.o ldt.o setup.o time.o sys_i386.o \
pci-dma.o i386_ksyms.o i387.o bluesmoke.o dmi_scan.o \ i386_ksyms.o i387.o bluesmoke.o dmi_scan.o \
bootflag.o bootflag.o
ifdef CONFIG_PCI
obj-y += pci-i386.o
ifdef CONFIG_VISWS
obj-y += pci-visws.o
else
obj-y += pci-pc.o pci-irq.o
endif
endif
obj-$(CONFIG_MCA) += mca.o obj-$(CONFIG_MCA) += mca.o
obj-$(CONFIG_MTRR) += mtrr.o obj-$(CONFIG_MTRR) += mtrr.o
obj-$(CONFIG_X86_MSR) += msr.o obj-$(CONFIG_X86_MSR) += msr.o
...@@ -47,4 +37,8 @@ obj-y += setup-visws.o ...@@ -47,4 +37,8 @@ obj-y += setup-visws.o
obj-$(CONFIG_X86_VISWS_APIC) += visws_apic.o obj-$(CONFIG_X86_VISWS_APIC) += visws_apic.o
endif endif
kernel-subdir-$(CONFIG_PCI) += pci
subdir-y := $(kernel-subdir-y)
obj-y += $(foreach dir,$(subdir-y),$(dir)/$(dir).o)
include $(TOPDIR)/Rules.make include $(TOPDIR)/Rules.make
O_TARGET := pci.o
obj-y := dma.o i386.o
ifdef CONFIG_VISWS
obj-y += visws.o
else
obj-$(CONFIG_PCI_BIOS) += pcbios.o
obj-$(CONFIG_PCI_DIRECT) += direct.o
ifdef CONFIG_MULTIQUAD
obj-y += numa.o
else
obj-y += fixup.o
ifdef CONFIG_ACPI_PCI
obj-y += acpi.o
else
obj-y += legacy.o
endif
endif # CONFIG_MULTIQUAD
obj-y += irq.o common.o
endif # CONFIG_VISWS
export-objs += $(obj-y)
include $(TOPDIR)/Rules.make
#include <linux/pci.h>
#include <linux/acpi.h>
#include "pci.h"
extern void eisa_set_level_irq(int irq);
static int acpi_lookup_irq (
struct pci_dev *dev,
int assign)
{
int result = 0;
int irq = 0;
u8 pin;
/* TBD: Select IRQ from possible to improve routing performance. */
/* Find IRQ pin */
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
if (!pin) {
DBG(" -> no interrupt pin\n");
return 0;
}
pin = pin - 1;
result = acpi_prt_get_irq(dev, pin, &irq);
if (!irq)
result = -ENODEV;
if (0 != result) {
printk(KERN_WARNING "PCI: No IRQ known for interrupt pin %c of device %s\n",
'A'+pin, dev->slot_name);
return result;
}
/* only check for the IRQ */
if (!assign) {
printk(KERN_INFO "PCI: Found IRQ %d for device %s\n",
irq, dev->slot_name);
return 1;
}
dev->irq = irq;
/* also assign an IRQ */
if (irq && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) {
result = acpi_prt_set_irq(dev, pin, irq);
if (0 != result) {
printk(KERN_WARNING "PCI: Could not assign IRQ %d to device %s\n", irq, dev->slot_name);
return result;
}
eisa_set_level_irq(irq);
printk(KERN_INFO "PCI: Assigned IRQ %d for device %s\n", irq, dev->slot_name);
}
return 1;
}
static int __init pci_acpi_init(void)
{
if (!(pci_probe & PCI_NO_ACPI_ROUTING)) {
printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
printk(KERN_INFO "PCI: if you experience problems, try using option 'pci=noacpi'\n");
pci_use_acpi_routing = 1;
pci_lookup_irq = acpi_lookup_irq;
}
return 0;
}
subsys_initcall(pci_acpi_init);
/*
* CHANGELOG :
* Jun 17, 1994 : Modified to accommodate the broken pre-PCI BIOS SPECIFICATION
* Revision 2.0 present on <thys@dennis.ee.up.ac.za>'s ASUS mainboard.
*
* Jan 5, 1995 : Modified to probe PCI hardware at boot time by Frederic
* Potter, potter@cao-vlsi.ibp.fr
*
* Jan 10, 1995 : Modified to store the information about configured pci
* devices into a list, which can be accessed via /proc/pci by
* Curtis Varner, cvarner@cs.ucr.edu
*
* Jan 12, 1995 : CPU-PCI bridge optimization support by Frederic Potter.
* Alpha version. Intel & UMC chipset support only.
*
* Apr 16, 1995 : Source merge with the DEC Alpha PCI support. Most of the code
* moved to drivers/pci/pci.c.
*
* Dec 7, 1996 : Added support for direct configuration access of boards
* with Intel compatible access schemes (tsbogend@alpha.franken.de)
*
* Feb 3, 1997 : Set internal functions to static, save/restore flags
* avoid dead locks reading broken PCI BIOS, werner@suse.de
*
* Apr 26, 1997 : Fixed case when there is BIOS32, but not PCI BIOS
* (mj@atrey.karlin.mff.cuni.cz)
*
* May 7, 1997 : Added some missing cli()'s. [mj]
*
* Jun 20, 1997 : Corrected problems in "conf1" type accesses.
* (paubert@iram.es)
*
* Aug 2, 1997 : Split to PCI BIOS handling and direct PCI access parts
* and cleaned it up... Martin Mares <mj@atrey.karlin.mff.cuni.cz>
*
* Feb 6, 1998 : No longer using BIOS to find devices and device classes. [mj]
*
* May 1, 1998 : Support for peer host bridges. [mj]
*
* Jun 19, 1998 : Changed to use spinlocks, so that PCI configuration space
* can be accessed from interrupts even on SMP systems. [mj]
*
* August 1998 : Better support for peer host bridges and more paranoid
* checks for direct hardware access. Ugh, this file starts to look as
* a large gallery of common hardware bug workarounds (watch the comments)
* -- the PCI specs themselves are sane, but most implementors should be
* hit hard with \hammer scaled \magstep5. [mj]
*
* Jan 23, 1999 : More improvements to peer host bridge logic. i450NX fixup. [mj]
*
* Feb 8, 1999 : Added UM8886BF I/O address fixup. [mj]
*
* August 1999 : New resource management and configuration access stuff. [mj]
*
* Sep 19, 1999 : Use PCI IRQ routing tables for detection of peer host bridges.
* Based on ideas by Chris Frantz and David Hinds. [mj]
*
* Sep 28, 1999 : Handle unreported/unassigned IRQs. Thanks to Shuu Yamaguchi
* for a lot of patience during testing. [mj]
*
* Oct 8, 1999 : Split to pci-i386.c, pci-pc.c and pci-visws.c. [mj]
*/
\ No newline at end of file
/*
* Low-Level PCI Support for PC
*
* (c) 1999--2000 Martin Mares <mj@ucw.cz>
*/
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <asm/segment.h>
#include <asm/io.h>
#include <asm/smp.h>
#include "pci.h"
#ifdef CONFIG_PCI_BIOS
extern void pcibios_sort(void);
#endif
unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2;
int pcibios_last_bus = -1;
struct pci_bus *pci_root_bus = NULL;
struct pci_ops *pci_root_ops = NULL;
int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value) = NULL;
int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value) = NULL;
/*
* This interrupt-safe spinlock protects all accesses to PCI
* configuration space.
*/
spinlock_t pci_config_lock = SPIN_LOCK_UNLOCKED;
/*
* Several buggy motherboards address only 16 devices and mirror
* them to next 16 IDs. We try to detect this `feature' on all
* primary buses (those containing host bridges as they are
* expected to be unique) and remove the ghost devices.
*/
static void __devinit pcibios_fixup_ghosts(struct pci_bus *b)
{
struct list_head *ln, *mn;
struct pci_dev *d, *e;
int mirror = PCI_DEVFN(16,0);
int seen_host_bridge = 0;
int i;
DBG("PCI: Scanning for ghost devices on bus %d\n", b->number);
for (ln=b->devices.next; ln != &b->devices; ln=ln->next) {
d = pci_dev_b(ln);
if ((d->class >> 8) == PCI_CLASS_BRIDGE_HOST)
seen_host_bridge++;
for (mn=ln->next; mn != &b->devices; mn=mn->next) {
e = pci_dev_b(mn);
if (e->devfn != d->devfn + mirror ||
e->vendor != d->vendor ||
e->device != d->device ||
e->class != d->class)
continue;
for(i=0; i<PCI_NUM_RESOURCES; i++)
if (e->resource[i].start != d->resource[i].start ||
e->resource[i].end != d->resource[i].end ||
e->resource[i].flags != d->resource[i].flags)
continue;
break;
}
if (mn == &b->devices)
return;
}
if (!seen_host_bridge)
return;
printk(KERN_WARNING "PCI: Ignoring ghost devices on bus %02x\n", b->number);
ln = &b->devices;
while (ln->next != &b->devices) {
d = pci_dev_b(ln->next);
if (d->devfn >= mirror) {
list_del(&d->global_list);
list_del(&d->bus_list);
kfree(d);
} else
ln = ln->next;
}
}
/*
* Called after each bus is probed, but before its children
* are examined.
*/
void __devinit pcibios_fixup_bus(struct pci_bus *b)
{
pcibios_fixup_ghosts(b);
pci_read_bridge_bases(b);
}
struct pci_bus * __devinit pcibios_scan_root(int busnum)
{
struct list_head *list;
struct pci_bus *bus;
list_for_each(list, &pci_root_buses) {
bus = pci_bus_b(list);
if (bus->number == busnum) {
/* Already scanned */
return bus;
}
}
printk("PCI: Probing PCI hardware (bus %02x)\n", busnum);
return pci_scan_bus(busnum, pci_root_ops, NULL);
}
static int __init pcibios_init(void)
{
if (!pci_root_ops) {
printk("PCI: System does not support PCI\n");
return 0;
}
pcibios_resource_survey();
#ifdef CONFIG_PCI_BIOS
if ((pci_probe & PCI_BIOS_SORT) && !(pci_probe & PCI_NO_SORT))
pcibios_sort();
#endif
return 0;
}
subsys_initcall(pcibios_init);
char * __devinit pcibios_setup(char *str)
{
if (!strcmp(str, "off")) {
pci_probe = 0;
return NULL;
}
#ifdef CONFIG_PCI_BIOS
else if (!strcmp(str, "bios")) {
pci_probe = PCI_PROBE_BIOS;
return NULL;
} else if (!strcmp(str, "nobios")) {
pci_probe &= ~PCI_PROBE_BIOS;
return NULL;
} else if (!strcmp(str, "nosort")) {
pci_probe |= PCI_NO_SORT;
return NULL;
} else if (!strcmp(str, "biosirq")) {
pci_probe |= PCI_BIOS_IRQ_SCAN;
return NULL;
}
#endif
#ifdef CONFIG_PCI_DIRECT
else if (!strcmp(str, "conf1")) {
pci_probe = PCI_PROBE_CONF1 | PCI_NO_CHECKS;
return NULL;
}
else if (!strcmp(str, "conf2")) {
pci_probe = PCI_PROBE_CONF2 | PCI_NO_CHECKS;
return NULL;
}
#endif
#ifdef CONFIG_ACPI_PCI
else if (!strcmp(str, "noacpi")) {
pci_probe |= PCI_NO_ACPI_ROUTING;
return NULL;
}
#endif
else if (!strcmp(str, "rom")) {
pci_probe |= PCI_ASSIGN_ROMS;
return NULL;
} else if (!strcmp(str, "assign-busses")) {
pci_probe |= PCI_ASSIGN_ALL_BUSSES;
return NULL;
} else if (!strcmp(str, "usepirqmask")) {
pci_probe |= PCI_USE_PIRQ_MASK;
return NULL;
} else if (!strncmp(str, "irqmask=", 8)) {
pcibios_irq_mask = simple_strtol(str+8, NULL, 0);
return NULL;
} else if (!strncmp(str, "lastbus=", 8)) {
pcibios_last_bus = simple_strtol(str+8, NULL, 0);
return NULL;
}
return str;
}
unsigned int pcibios_assign_all_busses(void)
{
return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0;
}
int pcibios_enable_device(struct pci_dev *dev)
{
int err;
if ((err = pcibios_enable_resources(dev)) < 0)
return err;
pcibios_enable_irq(dev);
return 0;
}
/*
* direct.c - Low-level direct PCI config space access
*/
#include <linux/pci.h>
#include "pci.h"
/*
* Functions for accessing PCI configuration space with type 1 accesses
*/
#define PCI_CONF1_ADDRESS(bus, dev, fn, reg) \
(0x80000000 | (bus << 16) | (dev << 11) | (fn << 8) | (reg & ~3))
static int pci_conf1_read (int seg, int bus, int dev, int fn, int reg, int len, u32 *value)
{
unsigned long flags;
if (!value || (bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
outl(PCI_CONF1_ADDRESS(bus, dev, fn, reg), 0xCF8);
switch (len) {
case 1:
*value = inb(0xCFC + (reg & 3));
break;
case 2:
*value = inw(0xCFC + (reg & 2));
break;
case 4:
*value = inl(0xCFC);
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
static int pci_conf1_write (int seg, int bus, int dev, int fn, int reg, int len, u32 value)
{
unsigned long flags;
if ((bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
outl(PCI_CONF1_ADDRESS(bus, dev, fn, reg), 0xCF8);
switch (len) {
case 1:
outb((u8)value, 0xCFC + (reg & 3));
break;
case 2:
outw((u16)value, 0xCFC + (reg & 2));
break;
case 4:
outl((u32)value, 0xCFC);
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
#undef PCI_CONF1_ADDRESS
static int pci_conf1_read_config_byte(struct pci_dev *dev, int where, u8 *value)
{
int result;
u32 data;
if (!value)
return -EINVAL;
result = pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 1, &data);
*value = (u8)data;
return result;
}
static int pci_conf1_read_config_word(struct pci_dev *dev, int where, u16 *value)
{
int result;
u32 data;
if (!value)
return -EINVAL;
result = pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 2, &data);
*value = (u16)data;
return result;
}
static int pci_conf1_read_config_dword(struct pci_dev *dev, int where, u32 *value)
{
if (!value)
return -EINVAL;
return pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 4, value);
}
static int pci_conf1_write_config_byte(struct pci_dev *dev, int where, u8 value)
{
return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 1, value);
}
static int pci_conf1_write_config_word(struct pci_dev *dev, int where, u16 value)
{
return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 2, value);
}
static int pci_conf1_write_config_dword(struct pci_dev *dev, int where, u32 value)
{
return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 4, value);
}
static struct pci_ops pci_direct_conf1 = {
pci_conf1_read_config_byte,
pci_conf1_read_config_word,
pci_conf1_read_config_dword,
pci_conf1_write_config_byte,
pci_conf1_write_config_word,
pci_conf1_write_config_dword
};
/*
* Functions for accessing PCI configuration space with type 2 accesses
*/
#define PCI_CONF2_ADDRESS(dev, reg) (u16)(0xC000 | (dev << 8) | reg)
static int pci_conf2_read (int seg, int bus, int dev, int fn, int reg, int len, u32 *value)
{
unsigned long flags;
if (!value || (bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
if (dev & 0x10)
return PCIBIOS_DEVICE_NOT_FOUND;
spin_lock_irqsave(&pci_config_lock, flags);
outb((u8)(0xF0 | (fn << 1)), 0xCF8);
outb((u8)bus, 0xCFA);
switch (len) {
case 1:
*value = inb(PCI_CONF2_ADDRESS(dev, reg));
break;
case 2:
*value = inw(PCI_CONF2_ADDRESS(dev, reg));
break;
case 4:
*value = inl(PCI_CONF2_ADDRESS(dev, reg));
break;
}
outb (0, 0xCF8);
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
static int pci_conf2_write (int seg, int bus, int dev, int fn, int reg, int len, u32 value)
{
unsigned long flags;
if ((bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
if (dev & 0x10)
return PCIBIOS_DEVICE_NOT_FOUND;
spin_lock_irqsave(&pci_config_lock, flags);
outb((u8)(0xF0 | (fn << 1)), 0xCF8);
outb((u8)bus, 0xCFA);
switch (len) {
case 1:
outb ((u8)value, PCI_CONF2_ADDRESS(dev, reg));
break;
case 2:
outw ((u16)value, PCI_CONF2_ADDRESS(dev, reg));
break;
case 4:
outl ((u32)value, PCI_CONF2_ADDRESS(dev, reg));
break;
}
outb (0, 0xCF8);
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
#undef PCI_CONF2_ADDRESS
static int pci_conf2_read_config_byte(struct pci_dev *dev, int where, u8 *value)
{
int result;
u32 data;
result = pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 1, &data);
*value = (u8)data;
return result;
}
static int pci_conf2_read_config_word(struct pci_dev *dev, int where, u16 *value)
{
int result;
u32 data;
result = pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 2, &data);
*value = (u16)data;
return result;
}
static int pci_conf2_read_config_dword(struct pci_dev *dev, int where, u32 *value)
{
return pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 4, value);
}
static int pci_conf2_write_config_byte(struct pci_dev *dev, int where, u8 value)
{
return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 1, value);
}
static int pci_conf2_write_config_word(struct pci_dev *dev, int where, u16 value)
{
return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 2, value);
}
static int pci_conf2_write_config_dword(struct pci_dev *dev, int where, u32 value)
{
return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 4, value);
}
static struct pci_ops pci_direct_conf2 = {
pci_conf2_read_config_byte,
pci_conf2_read_config_word,
pci_conf2_read_config_dword,
pci_conf2_write_config_byte,
pci_conf2_write_config_word,
pci_conf2_write_config_dword
};
/*
* Before we decide to use direct hardware access mechanisms, we try to do some
* trivial checks to ensure it at least _seems_ to be working -- we just test
* whether bus 00 contains a host bridge (this is similar to checking
* techniques used in XFree86, but ours should be more reliable since we
* attempt to make use of direct access hints provided by the PCI BIOS).
*
* This should be close to trivial, but it isn't, because there are buggy
* chipsets (yes, you guessed it, by Intel and Compaq) that have no class ID.
*/
static int __devinit pci_sanity_check(struct pci_ops *o)
{
u16 x;
struct pci_bus bus; /* Fake bus and device */
struct pci_dev dev;
if (pci_probe & PCI_NO_CHECKS)
return 1;
bus.number = 0;
dev.bus = &bus;
for(dev.devfn=0; dev.devfn < 0x100; dev.devfn++)
if ((!o->read_word(&dev, PCI_CLASS_DEVICE, &x) &&
(x == PCI_CLASS_BRIDGE_HOST || x == PCI_CLASS_DISPLAY_VGA)) ||
(!o->read_word(&dev, PCI_VENDOR_ID, &x) &&
(x == PCI_VENDOR_ID_INTEL || x == PCI_VENDOR_ID_COMPAQ)))
return 1;
DBG("PCI: Sanity check failed\n");
return 0;
}
static struct pci_ops * __devinit pci_check_direct(void)
{
unsigned int tmp;
unsigned long flags;
__save_flags(flags); __cli();
/*
* Check if configuration type 1 works.
*/
if (pci_probe & PCI_PROBE_CONF1) {
outb (0x01, 0xCFB);
tmp = inl (0xCF8);
outl (0x80000000, 0xCF8);
if (inl (0xCF8) == 0x80000000 &&
pci_sanity_check(&pci_direct_conf1)) {
outl (tmp, 0xCF8);
__restore_flags(flags);
printk(KERN_INFO "PCI: Using configuration type 1\n");
if (!request_region(0xCF8, 8, "PCI conf1"))
return NULL;
return &pci_direct_conf1;
}
outl (tmp, 0xCF8);
}
/*
* Check if configuration type 2 works.
*/
if (pci_probe & PCI_PROBE_CONF2) {
outb (0x00, 0xCFB);
outb (0x00, 0xCF8);
outb (0x00, 0xCFA);
if (inb (0xCF8) == 0x00 && inb (0xCFA) == 0x00 &&
pci_sanity_check(&pci_direct_conf2)) {
__restore_flags(flags);
printk(KERN_INFO "PCI: Using configuration type 2\n");
if (!request_region(0xCF8, 4, "PCI conf2"))
return NULL;
return &pci_direct_conf2;
}
}
__restore_flags(flags);
return NULL;
}
static int __init pci_direct_init(void)
{
if ((pci_probe & (PCI_PROBE_CONF1 | PCI_PROBE_CONF2))
&& (pci_root_ops = pci_check_direct())) {
if (pci_root_ops == &pci_direct_conf1) {
pci_config_read = pci_conf1_read;
pci_config_write = pci_conf1_write;
}
else {
pci_config_read = pci_conf2_read;
pci_config_write = pci_conf2_write;
}
}
return 0;
}
subsys_initcall(pci_direct_init);
/*
* Exceptions for specific devices. Usually work-arounds for fatal design flaws.
*/
#include <linux/pci.h>
#include "pci.h"
static void __devinit pci_fixup_i450nx(struct pci_dev *d)
{
/*
* i450NX -- Find and scan all secondary buses on all PXB's.
*/
int pxb, reg;
u8 busno, suba, subb;
printk(KERN_WARNING "PCI: Searching for i450NX host bridges on %s\n", d->slot_name);
reg = 0xd0;
for(pxb=0; pxb<2; pxb++) {
pci_read_config_byte(d, reg++, &busno);
pci_read_config_byte(d, reg++, &suba);
pci_read_config_byte(d, reg++, &subb);
DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb);
if (busno)
pci_scan_bus(busno, pci_root_ops, NULL); /* Bus A */
if (suba < subb)
pci_scan_bus(suba+1, pci_root_ops, NULL); /* Bus B */
}
pcibios_last_bus = -1;
}
static void __devinit pci_fixup_i450gx(struct pci_dev *d)
{
/*
* i450GX and i450KX -- Find and scan all secondary buses.
* (called separately for each PCI bridge found)
*/
u8 busno;
pci_read_config_byte(d, 0x4a, &busno);
printk(KERN_INFO "PCI: i440KX/GX host bridge %s: secondary bus %02x\n", d->slot_name, busno);
pci_scan_bus(busno, pci_root_ops, NULL);
pcibios_last_bus = -1;
}
static void __devinit pci_fixup_umc_ide(struct pci_dev *d)
{
/*
* UM8886BF IDE controller sets region type bits incorrectly,
* therefore they look like memory despite of them being I/O.
*/
int i;
printk(KERN_WARNING "PCI: Fixing base address flags for device %s\n", d->slot_name);
for(i=0; i<4; i++)
d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
}
static void __devinit pci_fixup_ncr53c810(struct pci_dev *d)
{
/*
* NCR 53C810 returns class code 0 (at least on some systems).
* Fix class to be PCI_CLASS_STORAGE_SCSI
*/
if (!d->class) {
printk(KERN_WARNING "PCI: fixing NCR 53C810 class code for %s\n", d->slot_name);
d->class = PCI_CLASS_STORAGE_SCSI << 8;
}
}
static void __devinit pci_fixup_ide_bases(struct pci_dev *d)
{
int i;
/*
* PCI IDE controllers use non-standard I/O port decoding, respect it.
*/
if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE)
return;
DBG("PCI: IDE base address fixup for %s\n", d->slot_name);
for(i=0; i<4; i++) {
struct resource *r = &d->resource[i];
if ((r->start & ~0x80) == 0x374) {
r->start |= 2;
r->end = r->start;
}
}
}
static void __devinit pci_fixup_ide_trash(struct pci_dev *d)
{
int i;
/*
* There exist PCI IDE controllers which have utter garbage
* in first four base registers. Ignore that.
*/
DBG("PCI: IDE base address trash cleared for %s\n", d->slot_name);
for(i=0; i<4; i++)
d->resource[i].start = d->resource[i].end = d->resource[i].flags = 0;
}
static void __devinit pci_fixup_latency(struct pci_dev *d)
{
/*
* SiS 5597 and 5598 chipsets require latency timer set to
* at most 32 to avoid lockups.
*/
DBG("PCI: Setting max latency to 32\n");
pcibios_max_latency = 32;
}
static void __devinit pci_fixup_piix4_acpi(struct pci_dev *d)
{
/*
* PIIX4 ACPI device: hardwired IRQ9
*/
d->irq = 9;
}
/*
* Addresses issues with problems in the memory write queue timer in
* certain VIA Northbridges. This bugfix is per VIA's specifications.
*
* VIA 8363,8622,8361 Northbridges:
* - bits 5, 6, 7 at offset 0x55 need to be turned off
* VIA 8367 (KT266x) Northbridges:
* - bits 5, 6, 7 at offset 0x95 need to be turned off
*/
static void __init pci_fixup_via_northbridge_bug(struct pci_dev *d)
{
u8 v;
int where = 0x55;
if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
where = 0x95; /* the memory write queue timer register is
different for the kt266x's: 0x95 not 0x55 */
}
pci_read_config_byte(d, where, &v);
if (v & 0xe0) {
printk(KERN_WARNING "Disabling broken memory write queue: [%02x] %02x->%02x\n",
where, v, v & 0x1f);
v &= 0x1f; /* clear bits 5, 6, 7 */
pci_write_config_byte(d, where, v);
}
}
struct pci_fixup pcibios_fixups[] = {
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, pci_fixup_ide_trash },
{ PCI_FIXUP_HEADER, PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, pci_fixup_ncr53c810 },
{ 0 }
};
...@@ -22,67 +22,6 @@ ...@@ -22,67 +22,6 @@
* PCI to PCI Bridge Specification * PCI to PCI Bridge Specification
* PCI System Design Guide * PCI System Design Guide
* *
*
* CHANGELOG :
* Jun 17, 1994 : Modified to accommodate the broken pre-PCI BIOS SPECIFICATION
* Revision 2.0 present on <thys@dennis.ee.up.ac.za>'s ASUS mainboard.
*
* Jan 5, 1995 : Modified to probe PCI hardware at boot time by Frederic
* Potter, potter@cao-vlsi.ibp.fr
*
* Jan 10, 1995 : Modified to store the information about configured pci
* devices into a list, which can be accessed via /proc/pci by
* Curtis Varner, cvarner@cs.ucr.edu
*
* Jan 12, 1995 : CPU-PCI bridge optimization support by Frederic Potter.
* Alpha version. Intel & UMC chipset support only.
*
* Apr 16, 1995 : Source merge with the DEC Alpha PCI support. Most of the code
* moved to drivers/pci/pci.c.
*
* Dec 7, 1996 : Added support for direct configuration access of boards
* with Intel compatible access schemes (tsbogend@alpha.franken.de)
*
* Feb 3, 1997 : Set internal functions to static, save/restore flags
* avoid dead locks reading broken PCI BIOS, werner@suse.de
*
* Apr 26, 1997 : Fixed case when there is BIOS32, but not PCI BIOS
* (mj@atrey.karlin.mff.cuni.cz)
*
* May 7, 1997 : Added some missing cli()'s. [mj]
*
* Jun 20, 1997 : Corrected problems in "conf1" type accesses.
* (paubert@iram.es)
*
* Aug 2, 1997 : Split to PCI BIOS handling and direct PCI access parts
* and cleaned it up... Martin Mares <mj@atrey.karlin.mff.cuni.cz>
*
* Feb 6, 1998 : No longer using BIOS to find devices and device classes. [mj]
*
* May 1, 1998 : Support for peer host bridges. [mj]
*
* Jun 19, 1998 : Changed to use spinlocks, so that PCI configuration space
* can be accessed from interrupts even on SMP systems. [mj]
*
* August 1998 : Better support for peer host bridges and more paranoid
* checks for direct hardware access. Ugh, this file starts to look as
* a large gallery of common hardware bug workarounds (watch the comments)
* -- the PCI specs themselves are sane, but most implementors should be
* hit hard with \hammer scaled \magstep5. [mj]
*
* Jan 23, 1999 : More improvements to peer host bridge logic. i450NX fixup. [mj]
*
* Feb 8, 1999 : Added UM8886BF I/O address fixup. [mj]
*
* August 1999 : New resource management and configuration access stuff. [mj]
*
* Sep 19, 1999 : Use PCI IRQ routing tables for detection of peer host bridges.
* Based on ideas by Chris Frantz and David Hinds. [mj]
*
* Sep 28, 1999 : Handle unreported/unassigned IRQs. Thanks to Shuu Yamaguchi
* for a lot of patience during testing. [mj]
*
* Oct 8, 1999 : Split to pci-i386.c, pci-pc.c and pci-visws.c. [mj]
*/ */
#include <linux/types.h> #include <linux/types.h>
...@@ -92,7 +31,7 @@ ...@@ -92,7 +31,7 @@
#include <linux/ioport.h> #include <linux/ioport.h>
#include <linux/errno.h> #include <linux/errno.h>
#include "pci-i386.h" #include "pci.h"
void void
pcibios_update_resource(struct pci_dev *dev, struct resource *root, pcibios_update_resource(struct pci_dev *dev, struct resource *root,
......
...@@ -17,7 +17,7 @@ ...@@ -17,7 +17,7 @@
#include <asm/smp.h> #include <asm/smp.h>
#include <asm/io_apic.h> #include <asm/io_apic.h>
#include "pci-i386.h" #include "pci.h"
#define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24)) #define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24))
#define PIRQ_VERSION 0x0100 #define PIRQ_VERSION 0x0100
...@@ -46,6 +46,8 @@ struct irq_router { ...@@ -46,6 +46,8 @@ struct irq_router {
int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq, int new); int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq, int new);
}; };
int (*pci_lookup_irq)(struct pci_dev * dev, int assign) = NULL;
/* /*
* Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table. * Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table.
*/ */
...@@ -116,7 +118,7 @@ static void __init pirq_peer_trick(void) ...@@ -116,7 +118,7 @@ static void __init pirq_peer_trick(void)
* Code for querying and setting of IRQ routes on various interrupt routers. * Code for querying and setting of IRQ routes on various interrupt routers.
*/ */
static void eisa_set_level_irq(unsigned int irq) void eisa_set_level_irq(unsigned int irq)
{ {
unsigned char mask = 1 << (irq & 7); unsigned char mask = 1 << (irq & 7);
unsigned int port = 0x4d0 + (irq >> 3); unsigned int port = 0x4d0 + (irq >> 3);
...@@ -558,54 +560,6 @@ static void pcibios_test_irq_handler(int irq, void *dev_id, struct pt_regs *regs ...@@ -558,54 +560,6 @@ static void pcibios_test_irq_handler(int irq, void *dev_id, struct pt_regs *regs
{ {
} }
#ifdef CONFIG_ACPI_PCI
static int acpi_lookup_irq (
struct pci_dev *dev,
u8 pin,
int assign)
{
int result = 0;
int irq = 0;
/* TBD: Select IRQ from possible to improve routing performance. */
result = acpi_prt_get_irq(dev, pin, &irq);
if (!irq)
result = -ENODEV;
if (0 != result) {
printk(KERN_WARNING "PCI: No IRQ known for interrupt pin %c of device %s\n",
'A'+pin, dev->slot_name);
return result;
}
dev->irq = irq;
if (!assign) {
/* only check for the IRQ */
printk(KERN_INFO "PCI: Found IRQ %d for device %s\n", irq,
dev->slot_name);
return 1;
}
/* also assign an IRQ */
if (irq && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) {
result = acpi_prt_set_irq(dev, pin, irq);
if (0 != result) {
printk(KERN_WARNING "PCI: Could not assign IRQ %d to device %s\n", irq, dev->slot_name);
return result;
}
eisa_set_level_irq(irq);
printk(KERN_INFO "PCI: Assigned IRQ %d for device %s\n", irq, dev->slot_name);
}
return 1;
}
#endif /* CONFIG_ACPI_PCI */
static int pcibios_lookup_irq(struct pci_dev *dev, int assign) static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
{ {
u8 pin; u8 pin;
...@@ -625,12 +579,6 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign) ...@@ -625,12 +579,6 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
} }
pin = pin - 1; pin = pin - 1;
#ifdef CONFIG_ACPI_PCI
/* Use ACPI to lookup IRQ */
if (pci_use_acpi_routing)
return acpi_lookup_irq(dev, pin, assign);
#endif
/* Find IRQ routing entry */ /* Find IRQ routing entry */
if (!pirq_table) if (!pirq_table)
...@@ -738,21 +686,12 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign) ...@@ -738,21 +686,12 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
return 1; return 1;
} }
void __init pcibios_irq_init(void) static int __init pcibios_irq_init(void)
{ {
DBG("PCI: IRQ init\n"); DBG("PCI: IRQ init\n");
#ifdef CONFIG_ACPI_PCI if (pci_lookup_irq)
if (!(pci_probe & PCI_NO_ACPI_ROUTING)) { return 0;
if (acpi_prts.count) {
printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
pci_use_acpi_routing = 1;
return;
}
else
printk(KERN_WARNING "PCI: Invalid ACPI-PCI IRQ routing table\n");
}
#endif
pirq_table = pirq_find_routing_table(); pirq_table = pirq_find_routing_table();
...@@ -773,8 +712,13 @@ void __init pcibios_irq_init(void) ...@@ -773,8 +712,13 @@ void __init pcibios_irq_init(void)
if (io_apic_assign_pci_irqs) if (io_apic_assign_pci_irqs)
pirq_table = NULL; pirq_table = NULL;
} }
pci_lookup_irq = pcibios_lookup_irq;
pcibios_fixup_irqs();
return 0;
} }
subsys_initcall(pcibios_irq_init);
void __init pcibios_fixup_irqs(void) void __init pcibios_fixup_irqs(void)
{ {
struct pci_dev *dev; struct pci_dev *dev;
...@@ -837,7 +781,7 @@ void __init pcibios_fixup_irqs(void) ...@@ -837,7 +781,7 @@ void __init pcibios_fixup_irqs(void)
* Still no IRQ? Try to lookup one... * Still no IRQ? Try to lookup one...
*/ */
if (pin && !dev->irq) if (pin && !dev->irq)
pcibios_lookup_irq(dev, 0); pci_lookup_irq(dev, 0);
} }
} }
...@@ -854,7 +798,7 @@ void pcibios_enable_irq(struct pci_dev *dev) ...@@ -854,7 +798,7 @@ void pcibios_enable_irq(struct pci_dev *dev)
{ {
u8 pin; u8 pin;
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) { if (pin && !pci_lookup_irq(dev, 1) && !dev->irq) {
char *msg; char *msg;
if (io_apic_assign_pci_irqs) if (io_apic_assign_pci_irqs)
msg = " Probably buggy MP table."; msg = " Probably buggy MP table.";
......
/*
* legacy.c - traditional, old school PCI bus probing
*/
#include <linux/pci.h>
#include "pci.h"
/*
* Discover remaining PCI buses in case there are peer host bridges.
* We use the number of last PCI bus provided by the PCI BIOS.
*/
static void __devinit pcibios_fixup_peer_bridges(void)
{
int n;
struct pci_bus bus;
struct pci_dev dev;
u16 l;
if (pcibios_last_bus <= 0 || pcibios_last_bus >= 0xff)
return;
DBG("PCI: Peer bridge fixup\n");
for (n=0; n <= pcibios_last_bus; n++) {
if (pci_bus_exists(&pci_root_buses, n))
continue;
bus.number = n;
bus.ops = pci_root_ops;
dev.bus = &bus;
for(dev.devfn=0; dev.devfn<256; dev.devfn += 8)
if (!pci_read_config_word(&dev, PCI_VENDOR_ID, &l) &&
l != 0x0000 && l != 0xffff) {
DBG("Found device at %02x:%02x [%04x]\n", n, dev.devfn, l);
printk(KERN_INFO "PCI: Discovered peer bus %02x\n", n);
pci_scan_bus(n, pci_root_ops, NULL);
break;
}
}
}
static int __init pci_legacy_init(void)
{
if (!pci_root_ops) {
printk("PCI: System does not support PCI\n");
return 0;
}
printk("PCI: Probing PCI hardware\n");
pci_root_bus = pcibios_scan_root(0);
if (!pci_use_acpi_routing)
pcibios_fixup_peer_bridges();
return 0;
}
subsys_initcall(pci_legacy_init);
/*
* numa.c - Low-level PCI access for NUMA-Q machines
*/
#include <linux/pci.h>
#include "pci.h"
#define BUS2QUAD(global) (mp_bus_id_to_node[global])
#define BUS2LOCAL(global) (mp_bus_id_to_local[global])
#define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local])
#define PCI_CONF1_ADDRESS(bus, dev, fn, reg) \
(0x80000000 | (BUS2LOCAL(bus) << 16) | (dev << 11) | (fn << 8) | (reg & ~3))
static int pci_conf1_read (int seg, int bus, int dev, int fn, int reg, int len, u32 *value)
{
unsigned long flags;
if (!value || (bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
outl_quad(PCI_CONF1_ADDRESS(bus, dev, fn, reg), 0xCF8, BUS2QUAD(bus));
switch (len) {
case 1:
*value = inb_quad(0xCFC + (reg & 3), BUS2QUAD(bus));
break;
case 2:
*value = inw_quad(0xCFC + (reg & 2), BUS2QUAD(bus));
break;
case 4:
*value = inl_quad(0xCFC, BUS2QUAD(bus));
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
static int pci_conf1_write (int seg, int bus, int dev, int fn, int reg, int len, u32 value)
{
unsigned long flags;
if ((bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
outl_quad(PCI_CONF1_ADDRESS(bus, dev, fn, reg), 0xCF8, BUS2QUAD(bus));
switch (len) {
case 1:
outb_quad((u8)value, 0xCFC + (reg & 3), BUS2QUAD(bus));
break;
case 2:
outw_quad((u16)value, 0xCFC + (reg & 2), BUS2QUAD(bus));
break;
case 4:
outl_quad((u32)value, 0xCFC, BUS2QUAD(bus));
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
static void __devinit pci_fixup_i450nx(struct pci_dev *d)
{
/*
* i450NX -- Find and scan all secondary buses on all PXB's.
*/
int pxb, reg;
u8 busno, suba, subb;
int quad = BUS2QUAD(d->bus->number);
printk("PCI: Searching for i450NX host bridges on %s\n", d->slot_name);
reg = 0xd0;
for(pxb=0; pxb<2; pxb++) {
pci_read_config_byte(d, reg++, &busno);
pci_read_config_byte(d, reg++, &suba);
pci_read_config_byte(d, reg++, &subb);
DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb);
if (busno)
pci_scan_bus(QUADLOCAL2BUS(quad,busno), pci_root_ops, NULL); /* Bus A */
if (suba < subb)
pci_scan_bus(QUADLOCAL2BUS(quad,suba+1), pci_root_ops, NULL); /* Bus B */
}
pcibios_last_bus = -1;
}
struct pci_fixup pcibios_fixups[] = {
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx },
};
static int __init pci_numa_init(void)
{
int quad;
pci_config_read = pci_conf1_read;
pci_config_write = pci_conf1_write;
pci_root_bus = pcibios_scan_root(0);
if (clustered_apic_mode && (numnodes > 1)) {
for (quad = 1; quad < numnodes; ++quad) {
printk("Scanning PCI bus %d for quad %d\n",
QUADLOCAL2BUS(quad,0), quad);
pci_scan_bus(QUADLOCAL2BUS(quad,0),
pci_root_ops, NULL);
}
}
return 0;
}
subsys_initcall(pci_numa_init);
/* /*
* Low-Level PCI Support for PC * BIOS32 and PCI BIOS handling.
*
* (c) 1999--2000 Martin Mares <mj@ucw.cz>
*/ */
#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/init.h> #include "pci.h"
#include <linux/ioport.h>
#include <asm/segment.h>
#include <asm/io.h>
#include <asm/smp.h>
#include "pci-i386.h"
unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2;
int pcibios_last_bus = -1;
struct pci_bus *pci_root_bus = NULL;
struct pci_ops *pci_root_ops = NULL;
int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value) = NULL;
int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value) = NULL;
#ifdef CONFIG_MULTIQUAD
#define BUS2QUAD(global) (mp_bus_id_to_node[global])
#define BUS2LOCAL(global) (mp_bus_id_to_local[global])
#define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local])
#else
#define BUS2QUAD(global) (0)
#define BUS2LOCAL(global) (global)
#define QUADLOCAL2BUS(quad,local) (local)
#endif
/*
* This interrupt-safe spinlock protects all accesses to PCI
* configuration space.
*/
static spinlock_t pci_config_lock = SPIN_LOCK_UNLOCKED;
/*
* Functions for accessing PCI configuration space with type 1 accesses
*/
#ifdef CONFIG_PCI_DIRECT
#ifdef CONFIG_MULTIQUAD
#define PCI_CONF1_ADDRESS(bus, dev, fn, reg) \
(0x80000000 | (BUS2LOCAL(bus) << 16) | (dev << 11) | (fn << 8) | (reg & ~3))
static int pci_conf1_read (int seg, int bus, int dev, int fn, int reg, int len, u32 *value) /* CONFIG_MULTIQUAD */
{
unsigned long flags;
if (!value || (bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
outl_quad(PCI_CONF1_ADDRESS(bus, dev, fn, reg), 0xCF8, BUS2QUAD(bus));
switch (len) {
case 1:
*value = inb_quad(0xCFC + (reg & 3), BUS2QUAD(bus));
break;
case 2:
*value = inw_quad(0xCFC + (reg & 2), BUS2QUAD(bus));
break;
case 4:
*value = inl_quad(0xCFC, BUS2QUAD(bus));
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
static int pci_conf1_write (int seg, int bus, int dev, int fn, int reg, int len, u32 value) /* CONFIG_MULTIQUAD */
{
unsigned long flags;
if ((bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
outl_quad(PCI_CONF1_ADDRESS(bus, dev, fn, reg), 0xCF8, BUS2QUAD(bus));
switch (len) {
case 1:
outb_quad((u8)value, 0xCFC + (reg & 3), BUS2QUAD(bus));
break;
case 2:
outw_quad((u16)value, 0xCFC + (reg & 2), BUS2QUAD(bus));
break;
case 4:
outl_quad((u32)value, 0xCFC, BUS2QUAD(bus));
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
#else /* !CONFIG_MULTIQUAD */
#define PCI_CONF1_ADDRESS(bus, dev, fn, reg) \
(0x80000000 | (bus << 16) | (dev << 11) | (fn << 8) | (reg & ~3))
static int pci_conf1_read (int seg, int bus, int dev, int fn, int reg, int len, u32 *value) /* !CONFIG_MULTIQUAD */
{
unsigned long flags;
if (!value || (bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
outl(PCI_CONF1_ADDRESS(bus, dev, fn, reg), 0xCF8);
switch (len) {
case 1:
*value = inb(0xCFC + (reg & 3));
break;
case 2:
*value = inw(0xCFC + (reg & 2));
break;
case 4:
*value = inl(0xCFC);
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
static int pci_conf1_write (int seg, int bus, int dev, int fn, int reg, int len, u32 value) /* !CONFIG_MULTIQUAD */
{
unsigned long flags;
if ((bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
outl(PCI_CONF1_ADDRESS(bus, dev, fn, reg), 0xCF8);
switch (len) {
case 1:
outb((u8)value, 0xCFC + (reg & 3));
break;
case 2:
outw((u16)value, 0xCFC + (reg & 2));
break;
case 4:
outl((u32)value, 0xCFC);
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
#endif /* CONFIG_MULTIQUAD */
#undef PCI_CONF1_ADDRESS
static int pci_conf1_read_config_byte(struct pci_dev *dev, int where, u8 *value)
{
int result;
u32 data;
if (!value)
return -EINVAL;
result = pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 1, &data);
*value = (u8)data;
return result;
}
static int pci_conf1_read_config_word(struct pci_dev *dev, int where, u16 *value)
{
int result;
u32 data;
if (!value)
return -EINVAL;
result = pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 2, &data);
*value = (u16)data;
return result;
}
static int pci_conf1_read_config_dword(struct pci_dev *dev, int where, u32 *value)
{
if (!value)
return -EINVAL;
return pci_conf1_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 4, value);
}
static int pci_conf1_write_config_byte(struct pci_dev *dev, int where, u8 value)
{
return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 1, value);
}
static int pci_conf1_write_config_word(struct pci_dev *dev, int where, u16 value)
{
return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 2, value);
}
static int pci_conf1_write_config_dword(struct pci_dev *dev, int where, u32 value)
{
return pci_conf1_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 4, value);
}
static struct pci_ops pci_direct_conf1 = {
pci_conf1_read_config_byte,
pci_conf1_read_config_word,
pci_conf1_read_config_dword,
pci_conf1_write_config_byte,
pci_conf1_write_config_word,
pci_conf1_write_config_dword
};
/*
* Functions for accessing PCI configuration space with type 2 accesses
*/
#define PCI_CONF2_ADDRESS(dev, reg) (u16)(0xC000 | (dev << 8) | reg)
static int pci_conf2_read (int seg, int bus, int dev, int fn, int reg, int len, u32 *value)
{
unsigned long flags;
if (!value || (bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
if (dev & 0x10)
return PCIBIOS_DEVICE_NOT_FOUND;
spin_lock_irqsave(&pci_config_lock, flags);
outb((u8)(0xF0 | (fn << 1)), 0xCF8);
outb((u8)bus, 0xCFA);
switch (len) {
case 1:
*value = inb(PCI_CONF2_ADDRESS(dev, reg));
break;
case 2:
*value = inw(PCI_CONF2_ADDRESS(dev, reg));
break;
case 4:
*value = inl(PCI_CONF2_ADDRESS(dev, reg));
break;
}
outb (0, 0xCF8);
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
static int pci_conf2_write (int seg, int bus, int dev, int fn, int reg, int len, u32 value)
{
unsigned long flags;
if ((bus > 255) || (dev > 31) || (fn > 7) || (reg > 255))
return -EINVAL;
if (dev & 0x10)
return PCIBIOS_DEVICE_NOT_FOUND;
spin_lock_irqsave(&pci_config_lock, flags);
outb((u8)(0xF0 | (fn << 1)), 0xCF8);
outb((u8)bus, 0xCFA);
switch (len) {
case 1:
outb ((u8)value, PCI_CONF2_ADDRESS(dev, reg));
break;
case 2:
outw ((u16)value, PCI_CONF2_ADDRESS(dev, reg));
break;
case 4:
outl ((u32)value, PCI_CONF2_ADDRESS(dev, reg));
break;
}
outb (0, 0xCF8);
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
#undef PCI_CONF2_ADDRESS
static int pci_conf2_read_config_byte(struct pci_dev *dev, int where, u8 *value)
{
int result;
u32 data;
result = pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 1, &data);
*value = (u8)data;
return result;
}
static int pci_conf2_read_config_word(struct pci_dev *dev, int where, u16 *value)
{
int result;
u32 data;
result = pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 2, &data);
*value = (u16)data;
return result;
}
static int pci_conf2_read_config_dword(struct pci_dev *dev, int where, u32 *value)
{
return pci_conf2_read(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 4, value);
}
static int pci_conf2_write_config_byte(struct pci_dev *dev, int where, u8 value)
{
return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 1, value);
}
static int pci_conf2_write_config_word(struct pci_dev *dev, int where, u16 value)
{
return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 2, value);
}
static int pci_conf2_write_config_dword(struct pci_dev *dev, int where, u32 value)
{
return pci_conf2_write(0, dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), where, 4, value);
}
static struct pci_ops pci_direct_conf2 = {
pci_conf2_read_config_byte,
pci_conf2_read_config_word,
pci_conf2_read_config_dword,
pci_conf2_write_config_byte,
pci_conf2_write_config_word,
pci_conf2_write_config_dword
};
/*
* Before we decide to use direct hardware access mechanisms, we try to do some
* trivial checks to ensure it at least _seems_ to be working -- we just test
* whether bus 00 contains a host bridge (this is similar to checking
* techniques used in XFree86, but ours should be more reliable since we
* attempt to make use of direct access hints provided by the PCI BIOS).
*
* This should be close to trivial, but it isn't, because there are buggy
* chipsets (yes, you guessed it, by Intel and Compaq) that have no class ID.
*/
static int __devinit pci_sanity_check(struct pci_ops *o)
{
u16 x;
struct pci_bus bus; /* Fake bus and device */
struct pci_dev dev;
if (pci_probe & PCI_NO_CHECKS)
return 1;
bus.number = 0;
dev.bus = &bus;
for(dev.devfn=0; dev.devfn < 0x100; dev.devfn++)
if ((!o->read_word(&dev, PCI_CLASS_DEVICE, &x) &&
(x == PCI_CLASS_BRIDGE_HOST || x == PCI_CLASS_DISPLAY_VGA)) ||
(!o->read_word(&dev, PCI_VENDOR_ID, &x) &&
(x == PCI_VENDOR_ID_INTEL || x == PCI_VENDOR_ID_COMPAQ)))
return 1;
DBG("PCI: Sanity check failed\n");
return 0;
}
static struct pci_ops * __devinit pci_check_direct(void)
{
unsigned int tmp;
unsigned long flags;
__save_flags(flags); __cli();
/*
* Check if configuration type 1 works.
*/
if (pci_probe & PCI_PROBE_CONF1) {
outb (0x01, 0xCFB);
tmp = inl (0xCF8);
outl (0x80000000, 0xCF8);
if (inl (0xCF8) == 0x80000000 &&
pci_sanity_check(&pci_direct_conf1)) {
outl (tmp, 0xCF8);
__restore_flags(flags);
printk(KERN_INFO "PCI: Using configuration type 1\n");
if (!request_region(0xCF8, 8, "PCI conf1"))
return NULL;
return &pci_direct_conf1;
}
outl (tmp, 0xCF8);
}
/*
* Check if configuration type 2 works.
*/
if (pci_probe & PCI_PROBE_CONF2) {
outb (0x00, 0xCFB);
outb (0x00, 0xCF8);
outb (0x00, 0xCFA);
if (inb (0xCF8) == 0x00 && inb (0xCFA) == 0x00 &&
pci_sanity_check(&pci_direct_conf2)) {
__restore_flags(flags);
printk(KERN_INFO "PCI: Using configuration type 2\n");
if (!request_region(0xCF8, 4, "PCI conf2"))
return NULL;
return &pci_direct_conf2;
}
}
__restore_flags(flags);
return NULL;
}
#endif
/*
* BIOS32 and PCI BIOS handling.
*/
#ifdef CONFIG_PCI_BIOS
#define PCIBIOS_PCI_FUNCTION_ID 0xb1XX #define PCIBIOS_PCI_FUNCTION_ID 0xb1XX
#define PCIBIOS_PCI_BIOS_PRESENT 0xb101 #define PCIBIOS_PCI_BIOS_PRESENT 0xb101
...@@ -877,7 +425,7 @@ static struct pci_ops * __devinit pci_find_bios(void) ...@@ -877,7 +425,7 @@ static struct pci_ops * __devinit pci_find_bios(void)
* which used BIOS ordering, we are bound to do this... * which used BIOS ordering, we are bound to do this...
*/ */
static void __devinit pcibios_sort(void) void __devinit pcibios_sort(void)
{ {
LIST_HEAD(sorted_devices); LIST_HEAD(sorted_devices);
struct list_head *ln; struct list_head *ln;
...@@ -996,314 +544,8 @@ int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq) ...@@ -996,314 +544,8 @@ int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq)
return !(ret & 0xff00); return !(ret & 0xff00);
} }
#endif static int __init pci_pcbios_init(void)
/*
* Several buggy motherboards address only 16 devices and mirror
* them to next 16 IDs. We try to detect this `feature' on all
* primary buses (those containing host bridges as they are
* expected to be unique) and remove the ghost devices.
*/
static void __devinit pcibios_fixup_ghosts(struct pci_bus *b)
{
struct list_head *ln, *mn;
struct pci_dev *d, *e;
int mirror = PCI_DEVFN(16,0);
int seen_host_bridge = 0;
int i;
DBG("PCI: Scanning for ghost devices on bus %d\n", b->number);
for (ln=b->devices.next; ln != &b->devices; ln=ln->next) {
d = pci_dev_b(ln);
if ((d->class >> 8) == PCI_CLASS_BRIDGE_HOST)
seen_host_bridge++;
for (mn=ln->next; mn != &b->devices; mn=mn->next) {
e = pci_dev_b(mn);
if (e->devfn != d->devfn + mirror ||
e->vendor != d->vendor ||
e->device != d->device ||
e->class != d->class)
continue;
for(i=0; i<PCI_NUM_RESOURCES; i++)
if (e->resource[i].start != d->resource[i].start ||
e->resource[i].end != d->resource[i].end ||
e->resource[i].flags != d->resource[i].flags)
continue;
break;
}
if (mn == &b->devices)
return;
}
if (!seen_host_bridge)
return;
printk(KERN_WARNING "PCI: Ignoring ghost devices on bus %02x\n", b->number);
ln = &b->devices;
while (ln->next != &b->devices) {
d = pci_dev_b(ln->next);
if (d->devfn >= mirror) {
list_del(&d->global_list);
list_del(&d->bus_list);
kfree(d);
} else
ln = ln->next;
}
}
/*
* Discover remaining PCI buses in case there are peer host bridges.
* We use the number of last PCI bus provided by the PCI BIOS.
*/
static void __devinit pcibios_fixup_peer_bridges(void)
{
int n;
struct pci_bus bus;
struct pci_dev dev;
u16 l;
if (pcibios_last_bus <= 0 || pcibios_last_bus >= 0xff)
return;
DBG("PCI: Peer bridge fixup\n");
for (n=0; n <= pcibios_last_bus; n++) {
if (pci_bus_exists(&pci_root_buses, n))
continue;
bus.number = n;
bus.ops = pci_root_ops;
dev.bus = &bus;
for(dev.devfn=0; dev.devfn<256; dev.devfn += 8)
if (!pci_read_config_word(&dev, PCI_VENDOR_ID, &l) &&
l != 0x0000 && l != 0xffff) {
DBG("Found device at %02x:%02x [%04x]\n", n, dev.devfn, l);
printk(KERN_INFO "PCI: Discovered peer bus %02x\n", n);
pci_scan_bus(n, pci_root_ops, NULL);
break;
}
}
}
/*
* Exceptions for specific devices. Usually work-arounds for fatal design flaws.
*/
static void __devinit pci_fixup_i450nx(struct pci_dev *d)
{
/*
* i450NX -- Find and scan all secondary buses on all PXB's.
*/
int pxb, reg;
u8 busno, suba, subb;
#ifdef CONFIG_MULTIQUAD
int quad = BUS2QUAD(d->bus->number);
#endif
printk("PCI: Searching for i450NX host bridges on %s\n", d->slot_name);
reg = 0xd0;
for(pxb=0; pxb<2; pxb++) {
pci_read_config_byte(d, reg++, &busno);
pci_read_config_byte(d, reg++, &suba);
pci_read_config_byte(d, reg++, &subb);
DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb);
if (busno)
pci_scan_bus(QUADLOCAL2BUS(quad,busno), pci_root_ops, NULL); /* Bus A */
if (suba < subb)
pci_scan_bus(QUADLOCAL2BUS(quad,suba+1), pci_root_ops, NULL); /* Bus B */
}
pcibios_last_bus = -1;
}
static void __devinit pci_fixup_i450gx(struct pci_dev *d)
{
/*
* i450GX and i450KX -- Find and scan all secondary buses.
* (called separately for each PCI bridge found)
*/
u8 busno;
pci_read_config_byte(d, 0x4a, &busno);
printk(KERN_INFO "PCI: i440KX/GX host bridge %s: secondary bus %02x\n", d->slot_name, busno);
pci_scan_bus(busno, pci_root_ops, NULL);
pcibios_last_bus = -1;
}
static void __devinit pci_fixup_umc_ide(struct pci_dev *d)
{
/*
* UM8886BF IDE controller sets region type bits incorrectly,
* therefore they look like memory despite of them being I/O.
*/
int i;
printk(KERN_WARNING "PCI: Fixing base address flags for device %s\n", d->slot_name);
for(i=0; i<4; i++)
d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
}
static void __devinit pci_fixup_ncr53c810(struct pci_dev *d)
{
/*
* NCR 53C810 returns class code 0 (at least on some systems).
* Fix class to be PCI_CLASS_STORAGE_SCSI
*/
if (!d->class) {
printk("PCI: fixing NCR 53C810 class code for %s\n", d->slot_name);
d->class = PCI_CLASS_STORAGE_SCSI << 8;
}
}
static void __devinit pci_fixup_ide_bases(struct pci_dev *d)
{ {
int i;
/*
* PCI IDE controllers use non-standard I/O port decoding, respect it.
*/
if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE)
return;
DBG("PCI: IDE base address fixup for %s\n", d->slot_name);
for(i=0; i<4; i++) {
struct resource *r = &d->resource[i];
if ((r->start & ~0x80) == 0x374) {
r->start |= 2;
r->end = r->start;
}
}
}
static void __devinit pci_fixup_ide_trash(struct pci_dev *d)
{
int i;
/*
* There exist PCI IDE controllers which have utter garbage
* in first four base registers. Ignore that.
*/
DBG("PCI: IDE base address trash cleared for %s\n", d->slot_name);
for(i=0; i<4; i++)
d->resource[i].start = d->resource[i].end = d->resource[i].flags = 0;
}
static void __devinit pci_fixup_latency(struct pci_dev *d)
{
/*
* SiS 5597 and 5598 chipsets require latency timer set to
* at most 32 to avoid lockups.
*/
DBG("PCI: Setting max latency to 32\n");
pcibios_max_latency = 32;
}
static void __devinit pci_fixup_piix4_acpi(struct pci_dev *d)
{
/*
* PIIX4 ACPI device: hardwired IRQ9
*/
d->irq = 9;
}
/*
* Addresses issues with problems in the memory write queue timer in
* certain VIA Northbridges. This bugfix is per VIA's specifications,
* except for the KL133/KM133: clearing bit 5 on those Northbridges seems
* to trigger a bug in its integrated ProSavage video card, which
* causes screen corruption. We only clear bits 6 and 7 for that chipset,
* until VIA can provide us with definitive information on why screen
* corruption occurs, and what exactly those bits do.
*
* VIA 8363,8622,8361 Northbridges:
* - bits 5, 6, 7 at offset 0x55 need to be turned off
* VIA 8367 (KT266x) Northbridges:
* - bits 5, 6, 7 at offset 0x95 need to be turned off
* VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
* - bits 6, 7 at offset 0x55 need to be turned off
*/
#define VIA_8363_KL133_REVISION_ID 0x81
#define VIA_8363_KM133_REVISION_ID 0x84
static void __init pci_fixup_via_northbridge_bug(struct pci_dev *d)
{
u8 v;
u8 revision;
int where = 0x55;
int mask = 0x1f; /* clear bits 5, 6, 7 by default */
pci_read_config_byte(d, PCI_REVISION_ID, &revision);
if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
where = 0x95; /* the memory write queue timer register is
different for the KT266x's: 0x95 not 0x55 */
} else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
(revision == VIA_8363_KL133_REVISION_ID ||
revision == VIA_8363_KM133_REVISION_ID)) {
mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
causes screen corruption on the KL133/KM133 */
}
pci_read_config_byte(d, where, &v);
if (v & ~mask) {
printk("Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
d->device, revision, where, v, mask, v & mask);
v &= mask;
pci_write_config_byte(d, where, v);
}
}
struct pci_fixup pcibios_fixups[] = {
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, pci_fixup_ide_trash },
{ PCI_FIXUP_HEADER, PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, pci_fixup_ncr53c810 },
{ 0 }
};
/*
* Called after each bus is probed, but before its children
* are examined.
*/
void __devinit pcibios_fixup_bus(struct pci_bus *b)
{
pcibios_fixup_ghosts(b);
pci_read_bridge_bases(b);
}
struct pci_bus * __devinit pcibios_scan_root(int busnum)
{
struct list_head *list;
struct pci_bus *bus;
list_for_each(list, &pci_root_buses) {
bus = pci_bus_b(list);
if (bus->number == busnum) {
/* Already scanned */
return bus;
}
}
printk("PCI: Probing PCI hardware (bus %02x)\n", busnum);
return pci_scan_bus(busnum, pci_root_ops, NULL);
}
void __devinit pcibios_config_init(void)
{
struct pci_ops *tmp=NULL;
/*
* Try all known PCI access methods. Note that we support using
* both PCI BIOS and direct access, with a preference for direct.
*/
#ifdef CONFIG_PCI_BIOS
if ((pci_probe & PCI_PROBE_BIOS) if ((pci_probe & PCI_PROBE_BIOS)
&& ((pci_root_ops = pci_find_bios()))) { && ((pci_root_ops = pci_find_bios()))) {
pci_probe |= PCI_BIOS_SORT; pci_probe |= PCI_BIOS_SORT;
...@@ -1311,133 +553,7 @@ void __devinit pcibios_config_init(void) ...@@ -1311,133 +553,7 @@ void __devinit pcibios_config_init(void)
pci_config_read = pci_bios_read; pci_config_read = pci_bios_read;
pci_config_write = pci_bios_write; pci_config_write = pci_bios_write;
} }
#endif
tmp = pci_root_ops;
#ifdef CONFIG_PCI_DIRECT
if ((pci_probe & (PCI_PROBE_CONF1 | PCI_PROBE_CONF2))
&& (pci_root_ops = pci_check_direct())) {
if (pci_root_ops == &pci_direct_conf1) {
pci_config_read = pci_conf1_read;
pci_config_write = pci_conf1_write;
}
else {
pci_config_read = pci_conf2_read;
pci_config_write = pci_conf2_write;
}
}
#endif
/* if direct access failed, fall back to BIOS access. */
if (pci_root_ops == NULL)
pci_root_ops = tmp;
return;
}
void __init pcibios_init(void)
{
int quad;
if (!pci_root_ops)
pcibios_config_init();
if (!pci_root_ops) {
printk("PCI: System does not support PCI\n");
return;
}
printk("PCI: Probing PCI hardware\n");
pci_root_bus = pcibios_scan_root(0);
if (clustered_apic_mode && (numnodes > 1)) {
for (quad = 1; quad < numnodes; ++quad) {
printk("Scanning PCI bus %d for quad %d\n",
QUADLOCAL2BUS(quad,0), quad);
pci_scan_bus(QUADLOCAL2BUS(quad,0),
pci_root_ops, NULL);
}
}
pcibios_irq_init();
if (!pci_use_acpi_routing)
pcibios_fixup_peer_bridges();
pcibios_fixup_irqs();
pcibios_resource_survey();
#ifdef CONFIG_PCI_BIOS
if ((pci_probe & PCI_BIOS_SORT) && !(pci_probe & PCI_NO_SORT))
pcibios_sort();
#endif
}
char * __devinit pcibios_setup(char *str)
{
if (!strcmp(str, "off")) {
pci_probe = 0;
return NULL;
}
#ifdef CONFIG_PCI_BIOS
else if (!strcmp(str, "bios")) {
pci_probe = PCI_PROBE_BIOS;
return NULL;
} else if (!strcmp(str, "nobios")) {
pci_probe &= ~PCI_PROBE_BIOS;
return NULL;
} else if (!strcmp(str, "nosort")) {
pci_probe |= PCI_NO_SORT;
return NULL;
} else if (!strcmp(str, "biosirq")) {
pci_probe |= PCI_BIOS_IRQ_SCAN;
return NULL;
}
#endif
#ifdef CONFIG_PCI_DIRECT
else if (!strcmp(str, "conf1")) {
pci_probe = PCI_PROBE_CONF1 | PCI_NO_CHECKS;
return NULL;
}
else if (!strcmp(str, "conf2")) {
pci_probe = PCI_PROBE_CONF2 | PCI_NO_CHECKS;
return NULL;
}
#endif
#ifdef CONFIG_ACPI_PCI
else if (!strcmp(str, "noacpi")) {
pci_probe |= PCI_NO_ACPI_ROUTING;
return NULL;
}
#endif
else if (!strcmp(str, "rom")) {
pci_probe |= PCI_ASSIGN_ROMS;
return NULL;
} else if (!strcmp(str, "assign-busses")) {
pci_probe |= PCI_ASSIGN_ALL_BUSSES;
return NULL;
} else if (!strcmp(str, "usepirqmask")) {
pci_probe |= PCI_USE_PIRQ_MASK;
return NULL;
} else if (!strncmp(str, "irqmask=", 8)) {
pcibios_irq_mask = simple_strtol(str+8, NULL, 0);
return NULL;
} else if (!strncmp(str, "lastbus=", 8)) {
pcibios_last_bus = simple_strtol(str+8, NULL, 0);
return NULL;
}
return str;
}
unsigned int pcibios_assign_all_busses(void)
{
return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0;
}
int pcibios_enable_device(struct pci_dev *dev)
{
int err;
if ((err = pcibios_enable_resources(dev)) < 0)
return err;
pcibios_enable_irq(dev);
return 0; return 0;
} }
subsys_initcall(pci_pcbios_init);
...@@ -67,7 +67,9 @@ struct irq_routing_table { ...@@ -67,7 +67,9 @@ struct irq_routing_table {
extern unsigned int pcibios_irq_mask; extern unsigned int pcibios_irq_mask;
extern int pci_use_acpi_routing; extern int pci_use_acpi_routing;
extern spinlock_t pci_config_lock;
void pcibios_irq_init(void);
void pcibios_fixup_irqs(void); void pcibios_fixup_irqs(void);
void pcibios_enable_irq(struct pci_dev *dev); void pcibios_enable_irq(struct pci_dev *dev);
extern int (*pci_lookup_irq)(struct pci_dev * dev, int assign);
...@@ -77,12 +77,13 @@ acpi_os_initialize(void) ...@@ -77,12 +77,13 @@ acpi_os_initialize(void)
* Initialize PCI configuration space access, as we'll need to access * Initialize PCI configuration space access, as we'll need to access
* it while walking the namespace (bus 0 and root bridges w/ _BBNs). * it while walking the namespace (bus 0 and root bridges w/ _BBNs).
*/ */
#if 0
pcibios_config_init(); pcibios_config_init();
if (!pci_config_read || !pci_config_write) { if (!pci_config_read || !pci_config_write) {
printk(KERN_ERR PREFIX "Access to PCI configuration space unavailable\n"); printk(KERN_ERR PREFIX "Access to PCI configuration space unavailable\n");
return AE_NULL_ENTRY; return AE_NULL_ENTRY;
} }
#endif
return AE_OK; return AE_OK;
} }
......
...@@ -38,7 +38,7 @@ ...@@ -38,7 +38,7 @@
#include <asm/uaccess.h> #include <asm/uaccess.h>
#include "cpqphp.h" #include "cpqphp.h"
#include "cpqphp_nvram.h" #include "cpqphp_nvram.h"
#include "../../arch/i386/kernel/pci-i386.h" /* horrible hack showing how processor dependant we are... */ #include "../../arch/i386/kernel/pci/pci.h" /* horrible hack showing how processor dependant we are... */
/* Global variables */ /* Global variables */
......
...@@ -35,7 +35,7 @@ ...@@ -35,7 +35,7 @@
#include <linux/pci.h> #include <linux/pci.h>
#include "cpqphp.h" #include "cpqphp.h"
#include "cpqphp_nvram.h" #include "cpqphp_nvram.h"
#include "../../arch/i386/kernel/pci-i386.h" /* horrible hack showing how processor dependant we are... */ #include "../../arch/i386/kernel/pci/pci.h" /* horrible hack showing how processor dependant we are... */
u8 cpqhp_nic_irq; u8 cpqhp_nic_irq;
......
...@@ -35,7 +35,7 @@ ...@@ -35,7 +35,7 @@
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/wait.h> #include <linux/wait.h>
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
#include "../../arch/i386/kernel/pci-i386.h" /* for struct irq_routing_table */ #include "../../arch/i386/kernel/pci/pci.h" /* for struct irq_routing_table */
#include "ibmphp.h" #include "ibmphp.h"
#define attn_on(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNON) #define attn_on(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNON)
......
...@@ -11,9 +11,11 @@ ...@@ -11,9 +11,11 @@
O_TARGET := driver.o O_TARGET := driver.o
export-objs := pci.o obj-y += access.o probe.o pci.o pool.o quirks.o \
compat.o names.o pci-driver.o search.o
obj-$(CONFIG_PM) += power.o
obj-$(CONFIG_HOTPLUG) += hotplug.o
obj-$(CONFIG_PCI) += pci.o quirks.o compat.o names.o pci-driver.o
obj-$(CONFIG_PROC_FS) += proc.o obj-$(CONFIG_PROC_FS) += proc.o
ifndef CONFIG_SPARC64 ifndef CONFIG_SPARC64
...@@ -35,6 +37,8 @@ ifndef CONFIG_X86 ...@@ -35,6 +37,8 @@ ifndef CONFIG_X86
obj-y += syscall.o obj-y += syscall.o
endif endif
export-objs := $(obj-y)
include $(TOPDIR)/Rules.make include $(TOPDIR)/Rules.make
names.o: names.c devlist.h classlist.h names.o: names.c devlist.h classlist.h
......
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/ioport.h>
/*
* This interrupt-safe spinlock protects all accesses to PCI
* configuration space.
*/
static spinlock_t pci_lock = SPIN_LOCK_UNLOCKED;
/*
* Wrappers for all PCI configuration access functions. They just check
* alignment, do locking and call the low-level functions pointed to
* by pci_dev->ops.
*/
#define PCI_byte_BAD 0
#define PCI_word_BAD (pos & 1)
#define PCI_dword_BAD (pos & 3)
#define PCI_OP(rw,size,type) \
int pci_##rw##_config_##size (struct pci_dev *dev, int pos, type value) \
{ \
int res; \
unsigned long flags; \
if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER; \
spin_lock_irqsave(&pci_lock, flags); \
res = dev->bus->ops->rw##_##size(dev, pos, value); \
spin_unlock_irqrestore(&pci_lock, flags); \
return res; \
}
PCI_OP(read, byte, u8 *)
PCI_OP(read, word, u16 *)
PCI_OP(read, dword, u32 *)
PCI_OP(write, byte, u8)
PCI_OP(write, word, u16)
PCI_OP(write, dword, u32)
EXPORT_SYMBOL(pci_read_config_byte);
EXPORT_SYMBOL(pci_read_config_word);
EXPORT_SYMBOL(pci_read_config_dword);
EXPORT_SYMBOL(pci_write_config_byte);
EXPORT_SYMBOL(pci_write_config_word);
EXPORT_SYMBOL(pci_write_config_dword);
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/kmod.h> /* for hotplug_path */
extern struct list_head pci_drivers;
extern int pci_announce_device(struct pci_driver *drv, struct pci_dev *dev);
#ifndef FALSE
#define FALSE (0)
#define TRUE (!FALSE)
#endif
static void
run_sbin_hotplug(struct pci_dev *pdev, int insert)
{
int i;
char *argv[3], *envp[8];
char id[20], sub_id[24], bus_id[24], class_id[20];
if (!hotplug_path[0])
return;
sprintf(class_id, "PCI_CLASS=%04X", pdev->class);
sprintf(id, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device);
sprintf(sub_id, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, pdev->subsystem_device);
sprintf(bus_id, "PCI_SLOT_NAME=%s", pdev->slot_name);
i = 0;
argv[i++] = hotplug_path;
argv[i++] = "pci";
argv[i] = 0;
i = 0;
/* minimal command environment */
envp[i++] = "HOME=/";
envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
/* other stuff we want to pass to /sbin/hotplug */
envp[i++] = class_id;
envp[i++] = id;
envp[i++] = sub_id;
envp[i++] = bus_id;
if (insert)
envp[i++] = "ACTION=add";
else
envp[i++] = "ACTION=remove";
envp[i] = 0;
call_usermodehelper (argv [0], argv, envp);
}
/**
* pci_announce_device_to_drivers - tell the drivers a new device has appeared
* @dev: the device that has shown up
*
* Notifys the drivers that a new device has appeared, and also notifys
* userspace through /sbin/hotplug.
*/
void
pci_announce_device_to_drivers(struct pci_dev *dev)
{
struct list_head *ln;
for(ln=pci_drivers.next; ln != &pci_drivers; ln=ln->next) {
struct pci_driver *drv = list_entry(ln, struct pci_driver, node);
if (drv->remove && pci_announce_device(drv, dev))
break;
}
/* notify userspace of new hotplug device */
run_sbin_hotplug(dev, TRUE);
}
/**
* pci_insert_device - insert a hotplug device
* @dev: the device to insert
* @bus: where to insert it
*
* Add a new device to the device lists and notify userspace (/sbin/hotplug).
*/
void
pci_insert_device(struct pci_dev *dev, struct pci_bus *bus)
{
list_add_tail(&dev->bus_list, &bus->devices);
list_add_tail(&dev->global_list, &pci_devices);
#ifdef CONFIG_PROC_FS
pci_proc_attach_device(dev);
#endif
pci_announce_device_to_drivers(dev);
}
static void
pci_free_resources(struct pci_dev *dev)
{
int i;
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
struct resource *res = dev->resource + i;
if (res->parent)
release_resource(res);
}
}
/**
* pci_remove_device - remove a hotplug device
* @dev: the device to remove
*
* Delete the device structure from the device lists and
* notify userspace (/sbin/hotplug).
*/
void
pci_remove_device(struct pci_dev *dev)
{
if (dev->driver) {
if (dev->driver->remove)
dev->driver->remove(dev);
dev->driver = NULL;
}
list_del(&dev->bus_list);
list_del(&dev->global_list);
pci_free_resources(dev);
#ifdef CONFIG_PROC_FS
pci_proc_detach_device(dev);
#endif
/* notify userspace of hotplug device removal */
run_sbin_hotplug(dev, FALSE);
}
EXPORT_SYMBOL(pci_insert_device);
EXPORT_SYMBOL(pci_remove_device);
EXPORT_SYMBOL(pci_announce_device_to_drivers);
/* /*
* drivers/pci/pci-driver.c - default PCI driver. * drivers/pci/pci-driver.c
* *
*/ */
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/module.h>
/*
* Registration of PCI drivers and handling of hot-pluggable devices.
*/
LIST_HEAD(pci_drivers);
/**
* pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
* @ids: array of PCI device id structures to search in
* @dev: the PCI device structure to match against
*
* Used by a driver to check whether a PCI device present in the
* system is in its list of supported devices.Returns the matching
* pci_device_id structure or %NULL if there is no match.
*/
const struct pci_device_id *
pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev)
{
while (ids->vendor || ids->subvendor || ids->class_mask) {
if ((ids->vendor == PCI_ANY_ID || ids->vendor == dev->vendor) &&
(ids->device == PCI_ANY_ID || ids->device == dev->device) &&
(ids->subvendor == PCI_ANY_ID || ids->subvendor == dev->subsystem_vendor) &&
(ids->subdevice == PCI_ANY_ID || ids->subdevice == dev->subsystem_device) &&
!((ids->class ^ dev->class) & ids->class_mask))
return ids;
ids++;
}
return NULL;
}
int
pci_announce_device(struct pci_driver *drv, struct pci_dev *dev)
{
const struct pci_device_id *id;
int ret = 0;
if (drv->id_table) {
id = pci_match_device(drv->id_table, dev);
if (!id) {
ret = 0;
goto out;
}
} else
id = NULL;
dev_probe_lock();
if (drv->probe(dev, id) >= 0) {
dev->driver = drv;
ret = 1;
}
dev_probe_unlock();
out:
return ret;
}
/**
* pci_register_driver - register a new pci driver
* @drv: the driver structure to register
*
* Adds the driver structure to the list of registered drivers
* Returns the number of pci devices which were claimed by the driver
* during registration. The driver remains registered even if the
* return value is zero.
*/
int
pci_register_driver(struct pci_driver *drv)
{
struct pci_dev *dev;
int count = 0;
list_add_tail(&drv->node, &pci_drivers);
pci_for_each_dev(dev) {
if (!pci_dev_driver(dev))
count += pci_announce_device(drv, dev);
}
return count;
}
/**
* pci_unregister_driver - unregister a pci driver
* @drv: the driver structure to unregister
*
* Deletes the driver structure from the list of registered PCI drivers,
* gives it a chance to clean up by calling its remove() function for
* each device it was responsible for, and marks those devices as
* driverless.
*/
void
pci_unregister_driver(struct pci_driver *drv)
{
struct pci_dev *dev;
list_del(&drv->node);
pci_for_each_dev(dev) {
if (dev->driver == drv) {
if (drv->remove)
drv->remove(dev);
dev->driver = NULL;
}
}
}
static struct pci_driver pci_compat_driver = {
name: "compat"
};
/**
* pci_dev_driver - get the pci_driver of a device
* @dev: the device to query
*
* Returns the appropriate pci_driver structure or %NULL if there is no
* registered driver for the device.
*/
struct pci_driver *
pci_dev_driver(const struct pci_dev *dev)
{
if (dev->driver)
return dev->driver;
else {
int i;
for(i=0; i<=PCI_ROM_RESOURCE; i++)
if (dev->resource[i].flags & IORESOURCE_BUSY)
return &pci_compat_driver;
}
return NULL;
}
static int pci_device_suspend(struct device * dev, u32 state, u32 level) static int pci_device_suspend(struct device * dev, u32 state, u32 level)
{ {
...@@ -34,3 +163,8 @@ struct device_driver pci_device_driver = { ...@@ -34,3 +163,8 @@ struct device_driver pci_device_driver = {
suspend: pci_device_suspend, suspend: pci_device_suspend,
resume: pci_device_resume, resume: pci_device_resume,
}; };
EXPORT_SYMBOL(pci_match_device);
EXPORT_SYMBOL(pci_register_driver);
EXPORT_SYMBOL(pci_unregister_driver);
EXPORT_SYMBOL(pci_dev_driver);
...@@ -9,23 +9,9 @@ ...@@ -9,23 +9,9 @@
* Copyright 1997 -- 2000 Martin Mares <mj@ucw.cz> * Copyright 1997 -- 2000 Martin Mares <mj@ucw.cz>
*/ */
#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/string.h> #include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/spinlock.h> #include <linux/spinlock.h>
#include <linux/pm.h>
#include <linux/kmod.h> /* for hotplug_path */
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/cache.h>
#include <asm/page.h>
#include <asm/dma.h> /* isa_dma_bridge_buggy */ #include <asm/dma.h> /* isa_dma_bridge_buggy */
#undef DEBUG #undef DEBUG
...@@ -36,114 +22,6 @@ ...@@ -36,114 +22,6 @@
#define DBG(x...) #define DBG(x...)
#endif #endif
LIST_HEAD(pci_root_buses);
LIST_HEAD(pci_devices);
extern struct device_driver pci_device_driver;
/**
* pci_find_slot - locate PCI device from a given PCI slot
* @bus: number of PCI bus on which desired PCI device resides
* @devfn: encodes number of PCI slot in which the desired PCI
* device resides and the logical device number within that slot
* in case of multi-function devices.
*
* Given a PCI bus and slot/function number, the desired PCI device
* is located in system global list of PCI devices. If the device
* is found, a pointer to its data structure is returned. If no
* device is found, %NULL is returned.
*/
struct pci_dev *
pci_find_slot(unsigned int bus, unsigned int devfn)
{
struct pci_dev *dev;
pci_for_each_dev(dev) {
if (dev->bus->number == bus && dev->devfn == devfn)
return dev;
}
return NULL;
}
/**
* pci_find_subsys - begin or continue searching for a PCI device by vendor/subvendor/device/subdevice id
* @vendor: PCI vendor id to match, or %PCI_ANY_ID to match all vendor ids
* @device: PCI device id to match, or %PCI_ANY_ID to match all device ids
* @ss_vendor: PCI subsystem vendor id to match, or %PCI_ANY_ID to match all vendor ids
* @ss_device: PCI subsystem device id to match, or %PCI_ANY_ID to match all device ids
* @from: Previous PCI device found in search, or %NULL for new search.
*
* Iterates through the list of known PCI devices. If a PCI device is
* found with a matching @vendor, @device, @ss_vendor and @ss_device, a pointer to its
* device structure is returned. Otherwise, %NULL is returned.
* A new search is initiated by passing %NULL to the @from argument.
* Otherwise if @from is not %NULL, searches continue from next device on the global list.
*/
struct pci_dev *
pci_find_subsys(unsigned int vendor, unsigned int device,
unsigned int ss_vendor, unsigned int ss_device,
const struct pci_dev *from)
{
struct list_head *n = from ? from->global_list.next : pci_devices.next;
while (n != &pci_devices) {
struct pci_dev *dev = pci_dev_g(n);
if ((vendor == PCI_ANY_ID || dev->vendor == vendor) &&
(device == PCI_ANY_ID || dev->device == device) &&
(ss_vendor == PCI_ANY_ID || dev->subsystem_vendor == ss_vendor) &&
(ss_device == PCI_ANY_ID || dev->subsystem_device == ss_device))
return dev;
n = n->next;
}
return NULL;
}
/**
* pci_find_device - begin or continue searching for a PCI device by vendor/device id
* @vendor: PCI vendor id to match, or %PCI_ANY_ID to match all vendor ids
* @device: PCI device id to match, or %PCI_ANY_ID to match all device ids
* @from: Previous PCI device found in search, or %NULL for new search.
*
* Iterates through the list of known PCI devices. If a PCI device is
* found with a matching @vendor and @device, a pointer to its device structure is
* returned. Otherwise, %NULL is returned.
* A new search is initiated by passing %NULL to the @from argument.
* Otherwise if @from is not %NULL, searches continue from next device on the global list.
*/
struct pci_dev *
pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
{
return pci_find_subsys(vendor, device, PCI_ANY_ID, PCI_ANY_ID, from);
}
/**
* pci_find_class - begin or continue searching for a PCI device by class
* @class: search for a PCI device with this class designation
* @from: Previous PCI device found in search, or %NULL for new search.
*
* Iterates through the list of known PCI devices. If a PCI device is
* found with a matching @class, a pointer to its device structure is
* returned. Otherwise, %NULL is returned.
* A new search is initiated by passing %NULL to the @from argument.
* Otherwise if @from is not %NULL, searches continue from next device
* on the global list.
*/
struct pci_dev *
pci_find_class(unsigned int class, const struct pci_dev *from)
{
struct list_head *n = from ? from->global_list.next : pci_devices.next;
while (n != &pci_devices) {
struct pci_dev *dev = pci_dev_g(n);
if (dev->class == class)
return dev;
n = n->next;
}
return NULL;
}
/** /**
* pci_find_capability - query for devices' capabilities * pci_find_capability - query for devices' capabilities
* @dev: PCI device to query * @dev: PCI device to query
...@@ -536,298 +414,6 @@ int pci_request_regions(struct pci_dev *pdev, char *res_name) ...@@ -536,298 +414,6 @@ int pci_request_regions(struct pci_dev *pdev, char *res_name)
return -EBUSY; return -EBUSY;
} }
/*
* Registration of PCI drivers and handling of hot-pluggable devices.
*/
static LIST_HEAD(pci_drivers);
/**
* pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
* @ids: array of PCI device id structures to search in
* @dev: the PCI device structure to match against
*
* Used by a driver to check whether a PCI device present in the
* system is in its list of supported devices.Returns the matching
* pci_device_id structure or %NULL if there is no match.
*/
const struct pci_device_id *
pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev)
{
while (ids->vendor || ids->subvendor || ids->class_mask) {
if ((ids->vendor == PCI_ANY_ID || ids->vendor == dev->vendor) &&
(ids->device == PCI_ANY_ID || ids->device == dev->device) &&
(ids->subvendor == PCI_ANY_ID || ids->subvendor == dev->subsystem_vendor) &&
(ids->subdevice == PCI_ANY_ID || ids->subdevice == dev->subsystem_device) &&
!((ids->class ^ dev->class) & ids->class_mask))
return ids;
ids++;
}
return NULL;
}
static int
pci_announce_device(struct pci_driver *drv, struct pci_dev *dev)
{
const struct pci_device_id *id;
int ret = 0;
if (drv->id_table) {
id = pci_match_device(drv->id_table, dev);
if (!id) {
ret = 0;
goto out;
}
} else
id = NULL;
dev_probe_lock();
if (drv->probe(dev, id) >= 0) {
dev->driver = drv;
ret = 1;
}
dev_probe_unlock();
out:
return ret;
}
/**
* pci_register_driver - register a new pci driver
* @drv: the driver structure to register
*
* Adds the driver structure to the list of registered drivers
* Returns the number of pci devices which were claimed by the driver
* during registration. The driver remains registered even if the
* return value is zero.
*/
int
pci_register_driver(struct pci_driver *drv)
{
struct pci_dev *dev;
int count = 0;
list_add_tail(&drv->node, &pci_drivers);
pci_for_each_dev(dev) {
if (!pci_dev_driver(dev))
count += pci_announce_device(drv, dev);
}
return count;
}
/**
* pci_unregister_driver - unregister a pci driver
* @drv: the driver structure to unregister
*
* Deletes the driver structure from the list of registered PCI drivers,
* gives it a chance to clean up by calling its remove() function for
* each device it was responsible for, and marks those devices as
* driverless.
*/
void
pci_unregister_driver(struct pci_driver *drv)
{
struct pci_dev *dev;
list_del(&drv->node);
pci_for_each_dev(dev) {
if (dev->driver == drv) {
if (drv->remove)
drv->remove(dev);
dev->driver = NULL;
}
}
}
#ifdef CONFIG_HOTPLUG
#ifndef FALSE
#define FALSE (0)
#define TRUE (!FALSE)
#endif
static void
run_sbin_hotplug(struct pci_dev *pdev, int insert)
{
int i;
char *argv[3], *envp[8];
char id[20], sub_id[24], bus_id[24], class_id[20];
if (!hotplug_path[0])
return;
sprintf(class_id, "PCI_CLASS=%04X", pdev->class);
sprintf(id, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device);
sprintf(sub_id, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, pdev->subsystem_device);
sprintf(bus_id, "PCI_SLOT_NAME=%s", pdev->slot_name);
i = 0;
argv[i++] = hotplug_path;
argv[i++] = "pci";
argv[i] = 0;
i = 0;
/* minimal command environment */
envp[i++] = "HOME=/";
envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
/* other stuff we want to pass to /sbin/hotplug */
envp[i++] = class_id;
envp[i++] = id;
envp[i++] = sub_id;
envp[i++] = bus_id;
if (insert)
envp[i++] = "ACTION=add";
else
envp[i++] = "ACTION=remove";
envp[i] = 0;
call_usermodehelper (argv [0], argv, envp);
}
/**
* pci_announce_device_to_drivers - tell the drivers a new device has appeared
* @dev: the device that has shown up
*
* Notifys the drivers that a new device has appeared, and also notifys
* userspace through /sbin/hotplug.
*/
void
pci_announce_device_to_drivers(struct pci_dev *dev)
{
struct list_head *ln;
for(ln=pci_drivers.next; ln != &pci_drivers; ln=ln->next) {
struct pci_driver *drv = list_entry(ln, struct pci_driver, node);
if (drv->remove && pci_announce_device(drv, dev))
break;
}
/* notify userspace of new hotplug device */
run_sbin_hotplug(dev, TRUE);
}
/**
* pci_insert_device - insert a hotplug device
* @dev: the device to insert
* @bus: where to insert it
*
* Add a new device to the device lists and notify userspace (/sbin/hotplug).
*/
void
pci_insert_device(struct pci_dev *dev, struct pci_bus *bus)
{
list_add_tail(&dev->bus_list, &bus->devices);
list_add_tail(&dev->global_list, &pci_devices);
#ifdef CONFIG_PROC_FS
pci_proc_attach_device(dev);
#endif
pci_announce_device_to_drivers(dev);
}
static void
pci_free_resources(struct pci_dev *dev)
{
int i;
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
struct resource *res = dev->resource + i;
if (res->parent)
release_resource(res);
}
}
/**
* pci_remove_device - remove a hotplug device
* @dev: the device to remove
*
* Delete the device structure from the device lists and
* notify userspace (/sbin/hotplug).
*/
void
pci_remove_device(struct pci_dev *dev)
{
if (dev->driver) {
if (dev->driver->remove)
dev->driver->remove(dev);
dev->driver = NULL;
}
list_del(&dev->bus_list);
list_del(&dev->global_list);
pci_free_resources(dev);
#ifdef CONFIG_PROC_FS
pci_proc_detach_device(dev);
#endif
/* notify userspace of hotplug device removal */
run_sbin_hotplug(dev, FALSE);
}
#endif
static struct pci_driver pci_compat_driver = {
name: "compat"
};
/**
* pci_dev_driver - get the pci_driver of a device
* @dev: the device to query
*
* Returns the appropriate pci_driver structure or %NULL if there is no
* registered driver for the device.
*/
struct pci_driver *
pci_dev_driver(const struct pci_dev *dev)
{
if (dev->driver)
return dev->driver;
else {
int i;
for(i=0; i<=PCI_ROM_RESOURCE; i++)
if (dev->resource[i].flags & IORESOURCE_BUSY)
return &pci_compat_driver;
}
return NULL;
}
/*
* This interrupt-safe spinlock protects all accesses to PCI
* configuration space.
*/
static spinlock_t pci_lock = SPIN_LOCK_UNLOCKED;
/*
* Wrappers for all PCI configuration access functions. They just check
* alignment, do locking and call the low-level functions pointed to
* by pci_dev->ops.
*/
#define PCI_byte_BAD 0
#define PCI_word_BAD (pos & 1)
#define PCI_dword_BAD (pos & 3)
#define PCI_OP(rw,size,type) \
int pci_##rw##_config_##size (struct pci_dev *dev, int pos, type value) \
{ \
int res; \
unsigned long flags; \
if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER; \
spin_lock_irqsave(&pci_lock, flags); \
res = dev->bus->ops->rw##_##size(dev, pos, value); \
spin_unlock_irqrestore(&pci_lock, flags); \
return res; \
}
PCI_OP(read, byte, u8 *)
PCI_OP(read, word, u16 *)
PCI_OP(read, dword, u32 *)
PCI_OP(write, byte, u8)
PCI_OP(write, word, u16)
PCI_OP(write, dword, u32)
/** /**
* pci_set_master - enables bus-mastering for device dev * pci_set_master - enables bus-mastering for device dev
* @dev: the PCI device to enable * @dev: the PCI device to enable
...@@ -967,1079 +553,13 @@ pci_dac_set_dma_mask(struct pci_dev *dev, u64 mask) ...@@ -967,1079 +553,13 @@ pci_dac_set_dma_mask(struct pci_dev *dev, u64 mask)
return 0; return 0;
} }
/*
* Translate the low bits of the PCI base
* to the resource type
*/
static inline unsigned int pci_calc_resource_flags(unsigned int flags)
{
if (flags & PCI_BASE_ADDRESS_SPACE_IO)
return IORESOURCE_IO;
if (flags & PCI_BASE_ADDRESS_MEM_PREFETCH)
return IORESOURCE_MEM | IORESOURCE_PREFETCH;
return IORESOURCE_MEM;
}
/*
* Find the extent of a PCI decode..
*/
static u32 pci_size(u32 base, unsigned long mask)
{
u32 size = mask & base; /* Find the significant bits */
size = size & ~(size-1); /* Get the lowest of them to find the decode size */
return size-1; /* extent = size - 1 */
}
static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
{
unsigned int pos, reg, next;
u32 l, sz;
struct resource *res;
for(pos=0; pos<howmany; pos = next) {
next = pos+1;
res = &dev->resource[pos];
res->name = dev->name;
reg = PCI_BASE_ADDRESS_0 + (pos << 2);
pci_read_config_dword(dev, reg, &l);
pci_write_config_dword(dev, reg, ~0);
pci_read_config_dword(dev, reg, &sz);
pci_write_config_dword(dev, reg, l);
if (!sz || sz == 0xffffffff)
continue;
if (l == 0xffffffff)
l = 0;
if ((l & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY) {
res->start = l & PCI_BASE_ADDRESS_MEM_MASK;
res->flags |= l & ~PCI_BASE_ADDRESS_MEM_MASK;
sz = pci_size(sz, PCI_BASE_ADDRESS_MEM_MASK);
} else {
res->start = l & PCI_BASE_ADDRESS_IO_MASK;
res->flags |= l & ~PCI_BASE_ADDRESS_IO_MASK;
sz = pci_size(sz, PCI_BASE_ADDRESS_IO_MASK & 0xffff);
}
res->end = res->start + (unsigned long) sz;
res->flags |= pci_calc_resource_flags(l);
if ((l & (PCI_BASE_ADDRESS_SPACE | PCI_BASE_ADDRESS_MEM_TYPE_MASK))
== (PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64)) {
pci_read_config_dword(dev, reg+4, &l);
next++;
#if BITS_PER_LONG == 64
res->start |= ((unsigned long) l) << 32;
res->end = res->start + sz;
pci_write_config_dword(dev, reg+4, ~0);
pci_read_config_dword(dev, reg+4, &sz);
pci_write_config_dword(dev, reg+4, l);
if (~sz)
res->end = res->start + 0xffffffff +
(((unsigned long) ~sz) << 32);
#else
if (l) {
printk(KERN_ERR "PCI: Unable to handle 64-bit address for device %s\n", dev->slot_name);
res->start = 0;
res->flags = 0;
continue;
}
#endif
}
}
if (rom) {
dev->rom_base_reg = rom;
res = &dev->resource[PCI_ROM_RESOURCE];
pci_read_config_dword(dev, rom, &l);
pci_write_config_dword(dev, rom, ~PCI_ROM_ADDRESS_ENABLE);
pci_read_config_dword(dev, rom, &sz);
pci_write_config_dword(dev, rom, l);
if (l == 0xffffffff)
l = 0;
if (sz && sz != 0xffffffff) {
res->flags = (l & PCI_ROM_ADDRESS_ENABLE) |
IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
res->start = l & PCI_ROM_ADDRESS_MASK;
sz = pci_size(sz, PCI_ROM_ADDRESS_MASK);
res->end = res->start + (unsigned long) sz;
}
res->name = dev->name;
}
}
void __devinit pci_read_bridge_bases(struct pci_bus *child)
{
struct pci_dev *dev = child->self;
u8 io_base_lo, io_limit_lo;
u16 mem_base_lo, mem_limit_lo;
unsigned long base, limit;
struct resource *res;
int i;
if (!dev) /* It's a host bus, nothing to read */
return;
for(i=0; i<3; i++)
child->resource[i] = &dev->resource[PCI_BRIDGE_RESOURCES+i];
res = child->resource[0];
pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo);
base = (io_base_lo & PCI_IO_RANGE_MASK) << 8;
limit = (io_limit_lo & PCI_IO_RANGE_MASK) << 8;
if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) {
u16 io_base_hi, io_limit_hi;
pci_read_config_word(dev, PCI_IO_BASE_UPPER16, &io_base_hi);
pci_read_config_word(dev, PCI_IO_LIMIT_UPPER16, &io_limit_hi);
base |= (io_base_hi << 16);
limit |= (io_limit_hi << 16);
}
if (base && base <= limit) {
res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
res->start = base;
res->end = limit + 0xfff;
res->name = child->name;
} else {
/*
* Ugh. We don't know enough about this bridge. Just assume
* that it's entirely transparent.
*/
printk(KERN_ERR "Unknown bridge resource %d: assuming transparent\n", 0);
child->resource[0] = child->parent->resource[0];
}
res = child->resource[1];
pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo);
pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo);
base = (mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16;
limit = (mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16;
if (base && base <= limit) {
res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
res->start = base;
res->end = limit + 0xfffff;
res->name = child->name;
} else {
/* See comment above. Same thing */
printk(KERN_ERR "Unknown bridge resource %d: assuming transparent\n", 1);
child->resource[1] = child->parent->resource[1];
}
res = child->resource[2];
pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo);
base = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16;
limit = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16;
if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) {
u32 mem_base_hi, mem_limit_hi;
pci_read_config_dword(dev, PCI_PREF_BASE_UPPER32, &mem_base_hi);
pci_read_config_dword(dev, PCI_PREF_LIMIT_UPPER32, &mem_limit_hi);
#if BITS_PER_LONG == 64
base |= ((long) mem_base_hi) << 32;
limit |= ((long) mem_limit_hi) << 32;
#else
if (mem_base_hi || mem_limit_hi) {
printk(KERN_ERR "PCI: Unable to handle 64-bit address space for %s\n", child->name);
return;
}
#endif
}
if (base && base <= limit) {
res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH;
res->start = base;
res->end = limit + 0xfffff;
res->name = child->name;
} else {
/* See comments above */
printk(KERN_ERR "Unknown bridge resource %d: assuming transparent\n", 2);
child->resource[2] = child->parent->resource[2];
}
}
static struct pci_bus * __devinit pci_alloc_bus(void)
{
struct pci_bus *b;
b = kmalloc(sizeof(*b), GFP_KERNEL);
if (b) {
memset(b, 0, sizeof(*b));
INIT_LIST_HEAD(&b->children);
INIT_LIST_HEAD(&b->devices);
}
return b;
}
struct pci_bus * __devinit pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr)
{
struct pci_bus *child;
int i;
/*
* Allocate a new bus, and inherit stuff from the parent..
*/
child = pci_alloc_bus();
list_add_tail(&child->node, &parent->children);
child->self = dev;
dev->subordinate = child;
child->parent = parent;
child->ops = parent->ops;
child->sysdata = parent->sysdata;
child->dev = &dev->dev;
/*
* Set up the primary, secondary and subordinate
* bus numbers.
*/
child->number = child->secondary = busnr;
child->primary = parent->secondary;
child->subordinate = 0xff;
/* Set up default resource pointers.. */
for (i = 0; i < 4; i++)
child->resource[i] = &dev->resource[PCI_BRIDGE_RESOURCES+i];
return child;
}
unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus);
/*
* If it's a bridge, configure it and scan the bus behind it.
* For CardBus bridges, we don't scan behind as the devices will
* be handled by the bridge driver itself.
*
* We need to process bridges in two passes -- first we scan those
* already configured by the BIOS and after we are done with all of
* them, we proceed to assigning numbers to the remaining buses in
* order to avoid overlaps between old and new bus numbers.
*/
static int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass)
{
unsigned int buses;
unsigned short cr;
struct pci_bus *child;
int is_cardbus = (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS);
pci_read_config_dword(dev, PCI_PRIMARY_BUS, &buses);
DBG("Scanning behind PCI bridge %s, config %06x, pass %d\n", dev->slot_name, buses & 0xffffff, pass);
if ((buses & 0xffff00) && !pcibios_assign_all_busses()) {
/*
* Bus already configured by firmware, process it in the first
* pass and just note the configuration.
*/
if (pass)
return max;
child = pci_add_new_bus(bus, dev, 0);
child->primary = buses & 0xFF;
child->secondary = (buses >> 8) & 0xFF;
child->subordinate = (buses >> 16) & 0xFF;
child->number = child->secondary;
if (!is_cardbus) {
unsigned int cmax = pci_do_scan_bus(child);
if (cmax > max) max = cmax;
} else {
unsigned int cmax = child->subordinate;
if (cmax > max) max = cmax;
}
} else {
/*
* We need to assign a number to this bus which we always
* do in the second pass. We also keep all address decoders
* on the bridge disabled during scanning. FIXME: Why?
*/
if (!pass)
return max;
pci_read_config_word(dev, PCI_COMMAND, &cr);
pci_write_config_word(dev, PCI_COMMAND, 0x0000);
pci_write_config_word(dev, PCI_STATUS, 0xffff);
child = pci_add_new_bus(bus, dev, ++max);
buses = (buses & 0xff000000)
| ((unsigned int)(child->primary) << 0)
| ((unsigned int)(child->secondary) << 8)
| ((unsigned int)(child->subordinate) << 16);
/*
* We need to blast all three values with a single write.
*/
pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses);
if (!is_cardbus) {
/* Now we can scan all subordinate buses... */
max = pci_do_scan_bus(child);
} else {
/*
* For CardBus bridges, we leave 4 bus numbers
* as cards with a PCI-to-PCI bridge can be
* inserted later.
*/
max += 3;
}
/*
* Set the subordinate bus number to its real value.
*/
child->subordinate = max;
pci_write_config_byte(dev, PCI_SUBORDINATE_BUS, max);
pci_write_config_word(dev, PCI_COMMAND, cr);
}
sprintf(child->name, (is_cardbus ? "PCI CardBus #%02x" : "PCI Bus #%02x"), child->number);
return max;
}
/*
* Read interrupt line and base address registers.
* The architecture-dependent code can tweak these, of course.
*/
static void pci_read_irq(struct pci_dev *dev)
{
unsigned char irq;
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq);
if (irq)
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
dev->irq = irq;
}
/**
* pci_setup_device - fill in class and map information of a device
* @dev: the device structure to fill
*
* Initialize the device structure with information about the device's
* vendor,class,memory and IO-space addresses,IRQ lines etc.
* Called at initialisation of the PCI subsystem and by CardBus services.
* Returns 0 on success and -1 if unknown type of device (not normal, bridge
* or CardBus).
*/
int pci_setup_device(struct pci_dev * dev)
{
u32 class;
sprintf(dev->slot_name, "%02x:%02x.%d", dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
sprintf(dev->name, "PCI device %04x:%04x", dev->vendor, dev->device);
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
class >>= 8; /* upper 3 bytes */
dev->class = class;
class >>= 8;
DBG("Found %02x:%02x [%04x/%04x] %06x %02x\n", dev->bus->number, dev->devfn, dev->vendor, dev->device, class, dev->hdr_type);
/* "Unknown power state" */
dev->current_state = 4;
switch (dev->hdr_type) { /* header type */
case PCI_HEADER_TYPE_NORMAL: /* standard header */
if (class == PCI_CLASS_BRIDGE_PCI)
goto bad;
pci_read_irq(dev);
pci_read_bases(dev, 6, PCI_ROM_ADDRESS);
pci_read_config_word(dev, PCI_SUBSYSTEM_VENDOR_ID, &dev->subsystem_vendor);
pci_read_config_word(dev, PCI_SUBSYSTEM_ID, &dev->subsystem_device);
break;
case PCI_HEADER_TYPE_BRIDGE: /* bridge header */
if (class != PCI_CLASS_BRIDGE_PCI)
goto bad;
pci_read_bases(dev, 2, PCI_ROM_ADDRESS1);
break;
case PCI_HEADER_TYPE_CARDBUS: /* CardBus bridge header */
if (class != PCI_CLASS_BRIDGE_CARDBUS)
goto bad;
pci_read_irq(dev);
pci_read_bases(dev, 1, 0);
pci_read_config_word(dev, PCI_CB_SUBSYSTEM_VENDOR_ID, &dev->subsystem_vendor);
pci_read_config_word(dev, PCI_CB_SUBSYSTEM_ID, &dev->subsystem_device);
break;
default: /* unknown header */
printk(KERN_ERR "PCI: device %s has unknown header type %02x, ignoring.\n",
dev->slot_name, dev->hdr_type);
return -1;
bad:
printk(KERN_ERR "PCI: %s: class %x doesn't match header type %02x. Ignoring class.\n",
dev->slot_name, class, dev->hdr_type);
dev->class = PCI_CLASS_NOT_DEFINED;
}
/* We found a fine healthy device, go go go... */
return 0;
}
/*
* Read the config data for a PCI device, sanity-check it
* and fill in the dev structure...
*/
struct pci_dev * __devinit pci_scan_device(struct pci_dev *temp)
{
struct pci_dev *dev;
u32 l;
if (pci_read_config_dword(temp, PCI_VENDOR_ID, &l))
return NULL;
/* some broken boards return 0 or ~0 if a slot is empty: */
if (l == 0xffffffff || l == 0x00000000 || l == 0x0000ffff || l == 0xffff0000)
return NULL;
dev = kmalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
memcpy(dev, temp, sizeof(*dev));
dev->vendor = l & 0xffff;
dev->device = (l >> 16) & 0xffff;
/* Assume 32-bit PCI; let 64-bit PCI cards (which are far rarer)
set this higher, assuming the system even supports it. */
dev->dma_mask = 0xffffffff;
if (pci_setup_device(dev) < 0) {
kfree(dev);
return NULL;
}
/* now put in global tree */
strcpy(dev->dev.name,dev->name);
strcpy(dev->dev.bus_id,dev->slot_name);
device_register(&dev->dev);
return dev;
}
struct pci_dev * __devinit pci_scan_slot(struct pci_dev *temp)
{
struct pci_bus *bus = temp->bus;
struct pci_dev *dev;
struct pci_dev *first_dev = NULL;
int func = 0;
int is_multi = 0;
u8 hdr_type;
for (func = 0; func < 8; func++, temp->devfn++) {
if (func && !is_multi) /* not a multi-function device */
continue;
if (pci_read_config_byte(temp, PCI_HEADER_TYPE, &hdr_type))
continue;
temp->hdr_type = hdr_type & 0x7f;
dev = pci_scan_device(temp);
if (!dev)
continue;
pci_name_device(dev);
if (!func) {
is_multi = hdr_type & 0x80;
first_dev = dev;
}
/*
* Link the device to both the global PCI device chain and
* the per-bus list of devices.
*/
list_add_tail(&dev->global_list, &pci_devices);
list_add_tail(&dev->bus_list, &bus->devices);
/* Fix up broken headers */
pci_fixup_device(PCI_FIXUP_HEADER, dev);
}
return first_dev;
}
unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus)
{
unsigned int devfn, max, pass;
struct list_head *ln;
struct pci_dev *dev, dev0;
DBG("Scanning bus %02x\n", bus->number);
max = bus->secondary;
/* Create a device template */
memset(&dev0, 0, sizeof(dev0));
dev0.bus = bus;
dev0.sysdata = bus->sysdata;
dev0.dev.parent = bus->dev;
dev0.dev.driver = &pci_device_driver;
/* Go find them, Rover! */
for (devfn = 0; devfn < 0x100; devfn += 8) {
dev0.devfn = devfn;
pci_scan_slot(&dev0);
}
/*
* After performing arch-dependent fixup of the bus, look behind
* all PCI-to-PCI bridges on this bus.
*/
DBG("Fixups for bus %02x\n", bus->number);
pcibios_fixup_bus(bus);
for (pass=0; pass < 2; pass++)
for (ln=bus->devices.next; ln != &bus->devices; ln=ln->next) {
dev = pci_dev_b(ln);
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
max = pci_scan_bridge(bus, dev, max, pass);
}
/*
* We've scanned the bus and so we know all about what's on
* the other side of any bridges that may be on this bus plus
* any devices.
*
* Return how far we've got finding sub-buses.
*/
DBG("Bus scan for %02x returning with max=%02x\n", bus->number, max);
return max;
}
int __devinit pci_bus_exists(const struct list_head *list, int nr)
{
const struct list_head *l;
for(l=list->next; l != list; l = l->next) {
const struct pci_bus *b = pci_bus_b(l);
if (b->number == nr || pci_bus_exists(&b->children, nr))
return 1;
}
return 0;
}
struct pci_bus * __devinit pci_alloc_primary_bus(int bus)
{
struct pci_bus *b;
if (pci_bus_exists(&pci_root_buses, bus)) {
/* If we already got to this bus through a different bridge, ignore it */
DBG("PCI: Bus %02x already known\n", bus);
return NULL;
}
b = pci_alloc_bus();
if (!b)
return NULL;
list_add_tail(&b->node, &pci_root_buses);
b->dev = kmalloc(sizeof(*(b->dev)),GFP_KERNEL);
memset(b->dev,0,sizeof(*(b->dev)));
sprintf(b->dev->bus_id,"pci%d",bus);
strcpy(b->dev->name,"Host/PCI Bridge");
device_register(b->dev);
b->number = b->secondary = bus;
b->resource[0] = &ioport_resource;
b->resource[1] = &iomem_resource;
return b;
}
struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
{
struct pci_bus *b = pci_alloc_primary_bus(bus);
if (b) {
b->sysdata = sysdata;
b->ops = ops;
b->subordinate = pci_do_scan_bus(b);
}
return b;
}
#ifdef CONFIG_PM
/*
* PCI Power management..
*
* This needs to be done centralized, so that we power manage PCI
* devices in the right order: we should not shut down PCI bridges
* before we've shut down the devices behind them, and we should
* not wake up devices before we've woken up the bridge to the
* device.. Eh?
*
* We do not touch devices that don't have a driver that exports
* a suspend/resume function. That is just too dangerous. If the default
* PCI suspend/resume functions work for a device, the driver can
* easily implement them (ie just have a suspend function that calls
* the pci_set_power_state() function).
*/
static int pci_pm_save_state_device(struct pci_dev *dev, u32 state)
{
int error = 0;
if (dev) {
struct pci_driver *driver = dev->driver;
if (driver && driver->save_state)
error = driver->save_state(dev,state);
}
return error;
}
static int pci_pm_suspend_device(struct pci_dev *dev, u32 state)
{
int error = 0;
if (dev) {
struct pci_driver *driver = dev->driver;
if (driver && driver->suspend)
error = driver->suspend(dev,state);
}
return error;
}
static int pci_pm_resume_device(struct pci_dev *dev)
{
int error = 0;
if (dev) {
struct pci_driver *driver = dev->driver;
if (driver && driver->resume)
error = driver->resume(dev);
}
return error;
}
static int pci_pm_save_state_bus(struct pci_bus *bus, u32 state)
{
struct list_head *list;
int error = 0;
list_for_each(list, &bus->children) {
error = pci_pm_save_state_bus(pci_bus_b(list),state);
if (error) return error;
}
list_for_each(list, &bus->devices) {
error = pci_pm_save_state_device(pci_dev_b(list),state);
if (error) return error;
}
return 0;
}
static int pci_pm_suspend_bus(struct pci_bus *bus, u32 state)
{
struct list_head *list;
/* Walk the bus children list */
list_for_each(list, &bus->children)
pci_pm_suspend_bus(pci_bus_b(list),state);
/* Walk the device children list */
list_for_each(list, &bus->devices)
pci_pm_suspend_device(pci_dev_b(list),state);
return 0;
}
static int pci_pm_resume_bus(struct pci_bus *bus)
{
struct list_head *list;
/* Walk the device children list */
list_for_each(list, &bus->devices)
pci_pm_resume_device(pci_dev_b(list));
/* And then walk the bus children */
list_for_each(list, &bus->children)
pci_pm_resume_bus(pci_bus_b(list));
return 0;
}
static int pci_pm_save_state(u32 state)
{
struct list_head *list;
struct pci_bus *bus;
int error = 0;
list_for_each(list, &pci_root_buses) {
bus = pci_bus_b(list);
error = pci_pm_save_state_bus(bus,state);
if (!error)
error = pci_pm_save_state_device(bus->self,state);
}
return error;
}
static int pci_pm_suspend(u32 state)
{
struct list_head *list;
struct pci_bus *bus;
list_for_each(list, &pci_root_buses) {
bus = pci_bus_b(list);
pci_pm_suspend_bus(bus,state);
pci_pm_suspend_device(bus->self,state);
}
return 0;
}
static int pci_pm_resume(void)
{
struct list_head *list;
struct pci_bus *bus;
list_for_each(list, &pci_root_buses) {
bus = pci_bus_b(list);
pci_pm_resume_device(bus->self);
pci_pm_resume_bus(bus);
}
return 0;
}
static int
pci_pm_callback(struct pm_dev *pm_device, pm_request_t rqst, void *data)
{
int error = 0;
switch (rqst) {
case PM_SAVE_STATE:
error = pci_pm_save_state((unsigned long)data);
break;
case PM_SUSPEND:
error = pci_pm_suspend((unsigned long)data);
break;
case PM_RESUME:
error = pci_pm_resume();
break;
default: break;
}
return error;
}
#endif
/*
* Pool allocator ... wraps the pci_alloc_consistent page allocator, so
* small blocks are easily used by drivers for bus mastering controllers.
* This should probably be sharing the guts of the slab allocator.
*/
struct pci_pool { /* the pool */
struct list_head page_list;
spinlock_t lock;
size_t blocks_per_page;
size_t size;
struct pci_dev *dev;
size_t allocation;
char name [32];
wait_queue_head_t waitq;
};
struct pci_page { /* cacheable header for 'allocation' bytes */
struct list_head page_list;
void *vaddr;
dma_addr_t dma;
unsigned long bitmap [0];
};
#define POOL_TIMEOUT_JIFFIES ((100 /* msec */ * HZ) / 1000)
#define POOL_POISON_BYTE 0xa7
/**
* pci_pool_create - Creates a pool of pci consistent memory blocks, for dma.
* @name: name of pool, for diagnostics
* @pdev: pci device that will be doing the DMA
* @size: size of the blocks in this pool.
* @align: alignment requirement for blocks; must be a power of two
* @allocation: returned blocks won't cross this boundary (or zero)
* @mem_flags: SLAB_* flags.
*
* Returns a pci allocation pool with the requested characteristics, or
* null if one can't be created. Given one of these pools, pci_pool_alloc()
* may be used to allocate memory. Such memory will all have "consistent"
* DMA mappings, accessible by the device and its driver without using
* cache flushing primitives. The actual size of blocks allocated may be
* larger than requested because of alignment.
*
* If allocation is nonzero, objects returned from pci_pool_alloc() won't
* cross that size boundary. This is useful for devices which have
* addressing restrictions on individual DMA transfers, such as not crossing
* boundaries of 4KBytes.
*/
struct pci_pool *
pci_pool_create (const char *name, struct pci_dev *pdev,
size_t size, size_t align, size_t allocation, int mem_flags)
{
struct pci_pool *retval;
if (align == 0)
align = 1;
if (size == 0)
return 0;
else if (size < align)
size = align;
else if ((size % align) != 0) {
size += align + 1;
size &= ~(align - 1);
}
if (allocation == 0) {
if (PAGE_SIZE < size)
allocation = size;
else
allocation = PAGE_SIZE;
// FIXME: round up for less fragmentation
} else if (allocation < size)
return 0;
if (!(retval = kmalloc (sizeof *retval, mem_flags)))
return retval;
strncpy (retval->name, name, sizeof retval->name);
retval->name [sizeof retval->name - 1] = 0;
retval->dev = pdev;
INIT_LIST_HEAD (&retval->page_list);
spin_lock_init (&retval->lock);
retval->size = size;
retval->allocation = allocation;
retval->blocks_per_page = allocation / size;
init_waitqueue_head (&retval->waitq);
return retval;
}
static struct pci_page *
pool_alloc_page (struct pci_pool *pool, int mem_flags)
{
struct pci_page *page;
int mapsize;
mapsize = pool->blocks_per_page;
mapsize = (mapsize + BITS_PER_LONG - 1) / BITS_PER_LONG;
mapsize *= sizeof (long);
page = (struct pci_page *) kmalloc (mapsize + sizeof *page, mem_flags);
if (!page)
return 0;
page->vaddr = pci_alloc_consistent (pool->dev,
pool->allocation,
&page->dma);
if (page->vaddr) {
memset (page->bitmap, 0xff, mapsize); // bit set == free
#ifdef CONFIG_DEBUG_SLAB
memset (page->vaddr, POOL_POISON_BYTE, pool->allocation);
#endif
list_add (&page->page_list, &pool->page_list);
} else {
kfree (page);
page = 0;
}
return page;
}
static inline int
is_page_busy (int blocks, unsigned long *bitmap)
{
while (blocks > 0) {
if (*bitmap++ != ~0UL)
return 1;
blocks -= BITS_PER_LONG;
}
return 0;
}
static void
pool_free_page (struct pci_pool *pool, struct pci_page *page)
{
dma_addr_t dma = page->dma;
#ifdef CONFIG_DEBUG_SLAB
memset (page->vaddr, POOL_POISON_BYTE, pool->allocation);
#endif
pci_free_consistent (pool->dev, pool->allocation, page->vaddr, dma);
list_del (&page->page_list);
kfree (page);
}
/**
* pci_pool_destroy - destroys a pool of pci memory blocks.
* @pool: pci pool that will be destroyed
*
* Caller guarantees that no more memory from the pool is in use,
* and that nothing will try to use the pool after this call.
*/
void
pci_pool_destroy (struct pci_pool *pool)
{
unsigned long flags;
spin_lock_irqsave (&pool->lock, flags);
while (!list_empty (&pool->page_list)) {
struct pci_page *page;
page = list_entry (pool->page_list.next,
struct pci_page, page_list);
if (is_page_busy (pool->blocks_per_page, page->bitmap)) {
printk (KERN_ERR "pci_pool_destroy %s/%s, %p busy\n",
pool->dev ? pool->dev->slot_name : NULL,
pool->name, page->vaddr);
/* leak the still-in-use consistent memory */
list_del (&page->page_list);
kfree (page);
} else
pool_free_page (pool, page);
}
spin_unlock_irqrestore (&pool->lock, flags);
kfree (pool);
}
/**
* pci_pool_alloc - get a block of consistent memory
* @pool: pci pool that will produce the block
* @mem_flags: SLAB_KERNEL or SLAB_ATOMIC
* @handle: pointer to dma address of block
*
* This returns the kernel virtual address of a currently unused block,
* and reports its dma address through the handle.
* If such a memory block can't be allocated, null is returned.
*/
void *
pci_pool_alloc (struct pci_pool *pool, int mem_flags, dma_addr_t *handle)
{
unsigned long flags;
struct list_head *entry;
struct pci_page *page;
int map, block;
size_t offset;
void *retval;
restart:
spin_lock_irqsave (&pool->lock, flags);
list_for_each (entry, &pool->page_list) {
int i;
page = list_entry (entry, struct pci_page, page_list);
/* only cachable accesses here ... */
for (map = 0, i = 0;
i < pool->blocks_per_page;
i += BITS_PER_LONG, map++) {
if (page->bitmap [map] == 0)
continue;
block = ffz (~ page->bitmap [map]);
if ((i + block) < pool->blocks_per_page) {
clear_bit (block, &page->bitmap [map]);
offset = (BITS_PER_LONG * map) + block;
offset *= pool->size;
goto ready;
}
}
}
if (!(page = pool_alloc_page (pool, mem_flags))) {
if (mem_flags == SLAB_KERNEL) {
DECLARE_WAITQUEUE (wait, current);
current->state = TASK_INTERRUPTIBLE;
add_wait_queue (&pool->waitq, &wait);
spin_unlock_irqrestore (&pool->lock, flags);
schedule_timeout (POOL_TIMEOUT_JIFFIES);
current->state = TASK_RUNNING;
remove_wait_queue (&pool->waitq, &wait);
goto restart;
}
retval = 0;
goto done;
}
clear_bit (0, &page->bitmap [0]);
offset = 0;
ready:
retval = offset + page->vaddr;
*handle = offset + page->dma;
done:
spin_unlock_irqrestore (&pool->lock, flags);
return retval;
}
static struct pci_page *
pool_find_page (struct pci_pool *pool, dma_addr_t dma)
{
unsigned long flags;
struct list_head *entry;
struct pci_page *page;
spin_lock_irqsave (&pool->lock, flags);
list_for_each (entry, &pool->page_list) {
page = list_entry (entry, struct pci_page, page_list);
if (dma < page->dma)
continue;
if (dma < (page->dma + pool->allocation))
goto done;
}
page = 0;
done:
spin_unlock_irqrestore (&pool->lock, flags);
return page;
}
/**
* pci_pool_free - put block back into pci pool
* @pool: the pci pool holding the block
* @vaddr: virtual address of block
* @dma: dma address of block
*
* Caller promises neither device nor driver will again touch this block
* unless it is first re-allocated.
*/
void
pci_pool_free (struct pci_pool *pool, void *vaddr, dma_addr_t dma)
{
struct pci_page *page;
unsigned long flags;
int map, block;
if ((page = pool_find_page (pool, dma)) == 0) {
printk (KERN_ERR "pci_pool_free %s/%s, %p/%lx (bad dma)\n",
pool->dev ? pool->dev->slot_name : NULL,
pool->name, vaddr, (unsigned long) dma);
return;
}
block = dma - page->dma;
block /= pool->size;
map = block / BITS_PER_LONG;
block %= BITS_PER_LONG;
#ifdef CONFIG_DEBUG_SLAB
if (((dma - page->dma) + (void *)page->vaddr) != vaddr) {
printk (KERN_ERR "pci_pool_free %s/%s, %p (bad vaddr)/%lx\n",
pool->dev ? pool->dev->slot_name : NULL,
pool->name, vaddr, (unsigned long) dma);
return;
}
if (page->bitmap [map] & (1UL << block)) {
printk (KERN_ERR "pci_pool_free %s/%s, dma %x already free\n",
pool->dev ? pool->dev->slot_name : NULL,
pool->name, dma);
return;
}
memset (vaddr, POOL_POISON_BYTE, pool->size);
#endif
spin_lock_irqsave (&pool->lock, flags);
set_bit (block, &page->bitmap [map]);
if (waitqueue_active (&pool->waitq))
wake_up (&pool->waitq);
/*
* Resist a temptation to do
* if (!is_page_busy(bpp, page->bitmap)) pool_free_page(pool, page);
* it is not interrupt safe. Better have empty pages hang around.
*/
spin_unlock_irqrestore (&pool->lock, flags);
}
static int __devinit pci_init(void) static int __devinit pci_init(void)
{ {
struct pci_dev *dev; struct pci_dev *dev;
pcibios_init();
pci_for_each_dev(dev) { pci_for_each_dev(dev) {
pci_fixup_device(PCI_FIXUP_FINAL, dev); pci_fixup_device(PCI_FIXUP_FINAL, dev);
} }
#ifdef CONFIG_PM
pm_register(PM_PCI_DEV, 0, pci_pm_callback);
#endif
return 0; return 0;
} }
...@@ -2062,51 +582,19 @@ subsys_initcall(pci_init); ...@@ -2062,51 +582,19 @@ subsys_initcall(pci_init);
__setup("pci=", pci_setup); __setup("pci=", pci_setup);
EXPORT_SYMBOL(pci_read_config_byte);
EXPORT_SYMBOL(pci_read_config_word);
EXPORT_SYMBOL(pci_read_config_dword);
EXPORT_SYMBOL(pci_write_config_byte);
EXPORT_SYMBOL(pci_write_config_word);
EXPORT_SYMBOL(pci_write_config_dword);
EXPORT_SYMBOL(pci_devices);
EXPORT_SYMBOL(pci_root_buses);
EXPORT_SYMBOL(pci_enable_device); EXPORT_SYMBOL(pci_enable_device);
EXPORT_SYMBOL(pci_disable_device); EXPORT_SYMBOL(pci_disable_device);
EXPORT_SYMBOL(pci_find_capability); EXPORT_SYMBOL(pci_find_capability);
EXPORT_SYMBOL(pci_release_regions); EXPORT_SYMBOL(pci_release_regions);
EXPORT_SYMBOL(pci_request_regions); EXPORT_SYMBOL(pci_request_regions);
EXPORT_SYMBOL(pci_find_class);
EXPORT_SYMBOL(pci_find_device);
EXPORT_SYMBOL(pci_find_slot);
EXPORT_SYMBOL(pci_find_subsys);
EXPORT_SYMBOL(pci_set_master); EXPORT_SYMBOL(pci_set_master);
EXPORT_SYMBOL(pci_set_mwi); EXPORT_SYMBOL(pci_set_mwi);
EXPORT_SYMBOL(pci_clear_mwi); EXPORT_SYMBOL(pci_clear_mwi);
EXPORT_SYMBOL(pci_set_dma_mask); EXPORT_SYMBOL(pci_set_dma_mask);
EXPORT_SYMBOL(pci_dac_set_dma_mask); EXPORT_SYMBOL(pci_dac_set_dma_mask);
EXPORT_SYMBOL(pci_assign_resource); EXPORT_SYMBOL(pci_assign_resource);
EXPORT_SYMBOL(pci_register_driver);
EXPORT_SYMBOL(pci_unregister_driver);
EXPORT_SYMBOL(pci_dev_driver);
EXPORT_SYMBOL(pci_match_device);
EXPORT_SYMBOL(pci_find_parent_resource); EXPORT_SYMBOL(pci_find_parent_resource);
#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL(pci_setup_device);
EXPORT_SYMBOL(pci_insert_device);
EXPORT_SYMBOL(pci_remove_device);
EXPORT_SYMBOL(pci_announce_device_to_drivers);
EXPORT_SYMBOL(pci_add_new_bus);
EXPORT_SYMBOL(pci_do_scan_bus);
EXPORT_SYMBOL(pci_scan_slot);
#ifdef CONFIG_PROC_FS
EXPORT_SYMBOL(pci_proc_attach_device);
EXPORT_SYMBOL(pci_proc_detach_device);
EXPORT_SYMBOL(pci_proc_attach_bus);
EXPORT_SYMBOL(pci_proc_detach_bus);
#endif
#endif
EXPORT_SYMBOL(pci_set_power_state); EXPORT_SYMBOL(pci_set_power_state);
EXPORT_SYMBOL(pci_save_state); EXPORT_SYMBOL(pci_save_state);
EXPORT_SYMBOL(pci_restore_state); EXPORT_SYMBOL(pci_restore_state);
...@@ -2128,11 +616,3 @@ EXPORT_SYMBOL(pcibios_find_device); ...@@ -2128,11 +616,3 @@ EXPORT_SYMBOL(pcibios_find_device);
EXPORT_SYMBOL(isa_dma_bridge_buggy); EXPORT_SYMBOL(isa_dma_bridge_buggy);
EXPORT_SYMBOL(pci_pci_problems); EXPORT_SYMBOL(pci_pci_problems);
/* Pool allocator */
EXPORT_SYMBOL (pci_pool_create);
EXPORT_SYMBOL (pci_pool_destroy);
EXPORT_SYMBOL (pci_pool_alloc);
EXPORT_SYMBOL (pci_pool_free);
#include <linux/pci.h>
#include <linux/module.h>
/*
* Pool allocator ... wraps the pci_alloc_consistent page allocator, so
* small blocks are easily used by drivers for bus mastering controllers.
* This should probably be sharing the guts of the slab allocator.
*/
struct pci_pool { /* the pool */
struct list_head page_list;
spinlock_t lock;
size_t blocks_per_page;
size_t size;
struct pci_dev *dev;
size_t allocation;
char name [32];
wait_queue_head_t waitq;
};
struct pci_page { /* cacheable header for 'allocation' bytes */
struct list_head page_list;
void *vaddr;
dma_addr_t dma;
unsigned long bitmap [0];
};
#define POOL_TIMEOUT_JIFFIES ((100 /* msec */ * HZ) / 1000)
#define POOL_POISON_BYTE 0xa7
/**
* pci_pool_create - Creates a pool of pci consistent memory blocks, for dma.
* @name: name of pool, for diagnostics
* @pdev: pci device that will be doing the DMA
* @size: size of the blocks in this pool.
* @align: alignment requirement for blocks; must be a power of two
* @allocation: returned blocks won't cross this boundary (or zero)
* @mem_flags: SLAB_* flags.
*
* Returns a pci allocation pool with the requested characteristics, or
* null if one can't be created. Given one of these pools, pci_pool_alloc()
* may be used to allocate memory. Such memory will all have "consistent"
* DMA mappings, accessible by the device and its driver without using
* cache flushing primitives. The actual size of blocks allocated may be
* larger than requested because of alignment.
*
* If allocation is nonzero, objects returned from pci_pool_alloc() won't
* cross that size boundary. This is useful for devices which have
* addressing restrictions on individual DMA transfers, such as not crossing
* boundaries of 4KBytes.
*/
struct pci_pool *
pci_pool_create (const char *name, struct pci_dev *pdev,
size_t size, size_t align, size_t allocation, int mem_flags)
{
struct pci_pool *retval;
if (align == 0)
align = 1;
if (size == 0)
return 0;
else if (size < align)
size = align;
else if ((size % align) != 0) {
size += align + 1;
size &= ~(align - 1);
}
if (allocation == 0) {
if (PAGE_SIZE < size)
allocation = size;
else
allocation = PAGE_SIZE;
// FIXME: round up for less fragmentation
} else if (allocation < size)
return 0;
if (!(retval = kmalloc (sizeof *retval, mem_flags)))
return retval;
strncpy (retval->name, name, sizeof retval->name);
retval->name [sizeof retval->name - 1] = 0;
retval->dev = pdev;
INIT_LIST_HEAD (&retval->page_list);
spin_lock_init (&retval->lock);
retval->size = size;
retval->allocation = allocation;
retval->blocks_per_page = allocation / size;
init_waitqueue_head (&retval->waitq);
return retval;
}
static struct pci_page *
pool_alloc_page (struct pci_pool *pool, int mem_flags)
{
struct pci_page *page;
int mapsize;
mapsize = pool->blocks_per_page;
mapsize = (mapsize + BITS_PER_LONG - 1) / BITS_PER_LONG;
mapsize *= sizeof (long);
page = (struct pci_page *) kmalloc (mapsize + sizeof *page, mem_flags);
if (!page)
return 0;
page->vaddr = pci_alloc_consistent (pool->dev,
pool->allocation,
&page->dma);
if (page->vaddr) {
memset (page->bitmap, 0xff, mapsize); // bit set == free
#ifdef CONFIG_DEBUG_SLAB
memset (page->vaddr, POOL_POISON_BYTE, pool->allocation);
#endif
list_add (&page->page_list, &pool->page_list);
} else {
kfree (page);
page = 0;
}
return page;
}
static inline int
is_page_busy (int blocks, unsigned long *bitmap)
{
while (blocks > 0) {
if (*bitmap++ != ~0UL)
return 1;
blocks -= BITS_PER_LONG;
}
return 0;
}
static void
pool_free_page (struct pci_pool *pool, struct pci_page *page)
{
dma_addr_t dma = page->dma;
#ifdef CONFIG_DEBUG_SLAB
memset (page->vaddr, POOL_POISON_BYTE, pool->allocation);
#endif
pci_free_consistent (pool->dev, pool->allocation, page->vaddr, dma);
list_del (&page->page_list);
kfree (page);
}
/**
* pci_pool_destroy - destroys a pool of pci memory blocks.
* @pool: pci pool that will be destroyed
*
* Caller guarantees that no more memory from the pool is in use,
* and that nothing will try to use the pool after this call.
*/
void
pci_pool_destroy (struct pci_pool *pool)
{
unsigned long flags;
spin_lock_irqsave (&pool->lock, flags);
while (!list_empty (&pool->page_list)) {
struct pci_page *page;
page = list_entry (pool->page_list.next,
struct pci_page, page_list);
if (is_page_busy (pool->blocks_per_page, page->bitmap)) {
printk (KERN_ERR "pci_pool_destroy %s/%s, %p busy\n",
pool->dev ? pool->dev->slot_name : NULL,
pool->name, page->vaddr);
/* leak the still-in-use consistent memory */
list_del (&page->page_list);
kfree (page);
} else
pool_free_page (pool, page);
}
spin_unlock_irqrestore (&pool->lock, flags);
kfree (pool);
}
/**
* pci_pool_alloc - get a block of consistent memory
* @pool: pci pool that will produce the block
* @mem_flags: SLAB_KERNEL or SLAB_ATOMIC
* @handle: pointer to dma address of block
*
* This returns the kernel virtual address of a currently unused block,
* and reports its dma address through the handle.
* If such a memory block can't be allocated, null is returned.
*/
void *
pci_pool_alloc (struct pci_pool *pool, int mem_flags, dma_addr_t *handle)
{
unsigned long flags;
struct list_head *entry;
struct pci_page *page;
int map, block;
size_t offset;
void *retval;
restart:
spin_lock_irqsave (&pool->lock, flags);
list_for_each (entry, &pool->page_list) {
int i;
page = list_entry (entry, struct pci_page, page_list);
/* only cachable accesses here ... */
for (map = 0, i = 0;
i < pool->blocks_per_page;
i += BITS_PER_LONG, map++) {
if (page->bitmap [map] == 0)
continue;
block = ffz (~ page->bitmap [map]);
if ((i + block) < pool->blocks_per_page) {
clear_bit (block, &page->bitmap [map]);
offset = (BITS_PER_LONG * map) + block;
offset *= pool->size;
goto ready;
}
}
}
if (!(page = pool_alloc_page (pool, mem_flags))) {
if (mem_flags == SLAB_KERNEL) {
DECLARE_WAITQUEUE (wait, current);
current->state = TASK_INTERRUPTIBLE;
add_wait_queue (&pool->waitq, &wait);
spin_unlock_irqrestore (&pool->lock, flags);
schedule_timeout (POOL_TIMEOUT_JIFFIES);
current->state = TASK_RUNNING;
remove_wait_queue (&pool->waitq, &wait);
goto restart;
}
retval = 0;
goto done;
}
clear_bit (0, &page->bitmap [0]);
offset = 0;
ready:
retval = offset + page->vaddr;
*handle = offset + page->dma;
done:
spin_unlock_irqrestore (&pool->lock, flags);
return retval;
}
static struct pci_page *
pool_find_page (struct pci_pool *pool, dma_addr_t dma)
{
unsigned long flags;
struct list_head *entry;
struct pci_page *page;
spin_lock_irqsave (&pool->lock, flags);
list_for_each (entry, &pool->page_list) {
page = list_entry (entry, struct pci_page, page_list);
if (dma < page->dma)
continue;
if (dma < (page->dma + pool->allocation))
goto done;
}
page = 0;
done:
spin_unlock_irqrestore (&pool->lock, flags);
return page;
}
/**
* pci_pool_free - put block back into pci pool
* @pool: the pci pool holding the block
* @vaddr: virtual address of block
* @dma: dma address of block
*
* Caller promises neither device nor driver will again touch this block
* unless it is first re-allocated.
*/
void
pci_pool_free (struct pci_pool *pool, void *vaddr, dma_addr_t dma)
{
struct pci_page *page;
unsigned long flags;
int map, block;
if ((page = pool_find_page (pool, dma)) == 0) {
printk (KERN_ERR "pci_pool_free %s/%s, %p/%lx (bad dma)\n",
pool->dev ? pool->dev->slot_name : NULL,
pool->name, vaddr, (unsigned long) dma);
return;
}
block = dma - page->dma;
block /= pool->size;
map = block / BITS_PER_LONG;
block %= BITS_PER_LONG;
#ifdef CONFIG_DEBUG_SLAB
if (((dma - page->dma) + (void *)page->vaddr) != vaddr) {
printk (KERN_ERR "pci_pool_free %s/%s, %p (bad vaddr)/%lx\n",
pool->dev ? pool->dev->slot_name : NULL,
pool->name, vaddr, (unsigned long) dma);
return;
}
if (page->bitmap [map] & (1UL << block)) {
printk (KERN_ERR "pci_pool_free %s/%s, dma %x already free\n",
pool->dev ? pool->dev->slot_name : NULL,
pool->name, dma);
return;
}
memset (vaddr, POOL_POISON_BYTE, pool->size);
#endif
spin_lock_irqsave (&pool->lock, flags);
set_bit (block, &page->bitmap [map]);
if (waitqueue_active (&pool->waitq))
wake_up (&pool->waitq);
/*
* Resist a temptation to do
* if (!is_page_busy(bpp, page->bitmap)) pool_free_page(pool, page);
* it is not interrupt safe. Better have empty pages hang around.
*/
spin_unlock_irqrestore (&pool->lock, flags);
}
EXPORT_SYMBOL (pci_pool_create);
EXPORT_SYMBOL (pci_pool_destroy);
EXPORT_SYMBOL (pci_pool_alloc);
EXPORT_SYMBOL (pci_pool_free);
#include <linux/pci.h>
#include <linux/pm.h>
/*
* PCI Power management..
*
* This needs to be done centralized, so that we power manage PCI
* devices in the right order: we should not shut down PCI bridges
* before we've shut down the devices behind them, and we should
* not wake up devices before we've woken up the bridge to the
* device.. Eh?
*
* We do not touch devices that don't have a driver that exports
* a suspend/resume function. That is just too dangerous. If the default
* PCI suspend/resume functions work for a device, the driver can
* easily implement them (ie just have a suspend function that calls
* the pci_set_power_state() function).
*/
static int pci_pm_save_state_device(struct pci_dev *dev, u32 state)
{
int error = 0;
if (dev) {
struct pci_driver *driver = dev->driver;
if (driver && driver->save_state)
error = driver->save_state(dev,state);
}
return error;
}
static int pci_pm_suspend_device(struct pci_dev *dev, u32 state)
{
int error = 0;
if (dev) {
struct pci_driver *driver = dev->driver;
if (driver && driver->suspend)
error = driver->suspend(dev,state);
}
return error;
}
static int pci_pm_resume_device(struct pci_dev *dev)
{
int error = 0;
if (dev) {
struct pci_driver *driver = dev->driver;
if (driver && driver->resume)
error = driver->resume(dev);
}
return error;
}
static int pci_pm_save_state_bus(struct pci_bus *bus, u32 state)
{
struct list_head *list;
int error = 0;
list_for_each(list, &bus->children) {
error = pci_pm_save_state_bus(pci_bus_b(list),state);
if (error) return error;
}
list_for_each(list, &bus->devices) {
error = pci_pm_save_state_device(pci_dev_b(list),state);
if (error) return error;
}
return 0;
}
static int pci_pm_suspend_bus(struct pci_bus *bus, u32 state)
{
struct list_head *list;
/* Walk the bus children list */
list_for_each(list, &bus->children)
pci_pm_suspend_bus(pci_bus_b(list),state);
/* Walk the device children list */
list_for_each(list, &bus->devices)
pci_pm_suspend_device(pci_dev_b(list),state);
return 0;
}
static int pci_pm_resume_bus(struct pci_bus *bus)
{
struct list_head *list;
/* Walk the device children list */
list_for_each(list, &bus->devices)
pci_pm_resume_device(pci_dev_b(list));
/* And then walk the bus children */
list_for_each(list, &bus->children)
pci_pm_resume_bus(pci_bus_b(list));
return 0;
}
static int pci_pm_save_state(u32 state)
{
struct list_head *list;
struct pci_bus *bus;
int error = 0;
list_for_each(list, &pci_root_buses) {
bus = pci_bus_b(list);
error = pci_pm_save_state_bus(bus,state);
if (!error)
error = pci_pm_save_state_device(bus->self,state);
}
return error;
}
static int pci_pm_suspend(u32 state)
{
struct list_head *list;
struct pci_bus *bus;
list_for_each(list, &pci_root_buses) {
bus = pci_bus_b(list);
pci_pm_suspend_bus(bus,state);
pci_pm_suspend_device(bus->self,state);
}
return 0;
}
static int pci_pm_resume(void)
{
struct list_head *list;
struct pci_bus *bus;
list_for_each(list, &pci_root_buses) {
bus = pci_bus_b(list);
pci_pm_resume_device(bus->self);
pci_pm_resume_bus(bus);
}
return 0;
}
static int
pci_pm_callback(struct pm_dev *pm_device, pm_request_t rqst, void *data)
{
int error = 0;
switch (rqst) {
case PM_SAVE_STATE:
error = pci_pm_save_state((unsigned long)data);
break;
case PM_SUSPEND:
error = pci_pm_suspend((unsigned long)data);
break;
case PM_RESUME:
error = pci_pm_resume();
break;
default: break;
}
return error;
}
static int __init pci_pm_init(void)
{
pm_register(PM_PCI_DEV, 0, pci_pm_callback);
return 0;
}
subsys_initcall(pci_pm_init);
/*
* probe.c - PCI detection and setup code
*/
#include <linux/pci.h>
#include <linux/module.h>
#undef DEBUG
#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
LIST_HEAD(pci_root_buses);
LIST_HEAD(pci_devices);
extern struct device_driver pci_device_driver;
/*
* Translate the low bits of the PCI base
* to the resource type
*/
static inline unsigned int pci_calc_resource_flags(unsigned int flags)
{
if (flags & PCI_BASE_ADDRESS_SPACE_IO)
return IORESOURCE_IO;
if (flags & PCI_BASE_ADDRESS_MEM_PREFETCH)
return IORESOURCE_MEM | IORESOURCE_PREFETCH;
return IORESOURCE_MEM;
}
/*
* Find the extent of a PCI decode..
*/
static u32 pci_size(u32 base, unsigned long mask)
{
u32 size = mask & base; /* Find the significant bits */
size = size & ~(size-1); /* Get the lowest of them to find the decode size */
return size-1; /* extent = size - 1 */
}
static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
{
unsigned int pos, reg, next;
u32 l, sz;
struct resource *res;
for(pos=0; pos<howmany; pos = next) {
next = pos+1;
res = &dev->resource[pos];
res->name = dev->name;
reg = PCI_BASE_ADDRESS_0 + (pos << 2);
pci_read_config_dword(dev, reg, &l);
pci_write_config_dword(dev, reg, ~0);
pci_read_config_dword(dev, reg, &sz);
pci_write_config_dword(dev, reg, l);
if (!sz || sz == 0xffffffff)
continue;
if (l == 0xffffffff)
l = 0;
if ((l & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY) {
res->start = l & PCI_BASE_ADDRESS_MEM_MASK;
res->flags |= l & ~PCI_BASE_ADDRESS_MEM_MASK;
sz = pci_size(sz, PCI_BASE_ADDRESS_MEM_MASK);
} else {
res->start = l & PCI_BASE_ADDRESS_IO_MASK;
res->flags |= l & ~PCI_BASE_ADDRESS_IO_MASK;
sz = pci_size(sz, PCI_BASE_ADDRESS_IO_MASK & 0xffff);
}
res->end = res->start + (unsigned long) sz;
res->flags |= pci_calc_resource_flags(l);
if ((l & (PCI_BASE_ADDRESS_SPACE | PCI_BASE_ADDRESS_MEM_TYPE_MASK))
== (PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64)) {
pci_read_config_dword(dev, reg+4, &l);
next++;
#if BITS_PER_LONG == 64
res->start |= ((unsigned long) l) << 32;
res->end = res->start + sz;
pci_write_config_dword(dev, reg+4, ~0);
pci_read_config_dword(dev, reg+4, &sz);
pci_write_config_dword(dev, reg+4, l);
if (~sz)
res->end = res->start + 0xffffffff +
(((unsigned long) ~sz) << 32);
#else
if (l) {
printk(KERN_ERR "PCI: Unable to handle 64-bit address for device %s\n", dev->slot_name);
res->start = 0;
res->flags = 0;
continue;
}
#endif
}
}
if (rom) {
dev->rom_base_reg = rom;
res = &dev->resource[PCI_ROM_RESOURCE];
pci_read_config_dword(dev, rom, &l);
pci_write_config_dword(dev, rom, ~PCI_ROM_ADDRESS_ENABLE);
pci_read_config_dword(dev, rom, &sz);
pci_write_config_dword(dev, rom, l);
if (l == 0xffffffff)
l = 0;
if (sz && sz != 0xffffffff) {
res->flags = (l & PCI_ROM_ADDRESS_ENABLE) |
IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
res->start = l & PCI_ROM_ADDRESS_MASK;
sz = pci_size(sz, PCI_ROM_ADDRESS_MASK);
res->end = res->start + (unsigned long) sz;
}
res->name = dev->name;
}
}
void __devinit pci_read_bridge_bases(struct pci_bus *child)
{
struct pci_dev *dev = child->self;
u8 io_base_lo, io_limit_lo;
u16 mem_base_lo, mem_limit_lo;
unsigned long base, limit;
struct resource *res;
int i;
if (!dev) /* It's a host bus, nothing to read */
return;
for(i=0; i<3; i++)
child->resource[i] = &dev->resource[PCI_BRIDGE_RESOURCES+i];
res = child->resource[0];
pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo);
base = (io_base_lo & PCI_IO_RANGE_MASK) << 8;
limit = (io_limit_lo & PCI_IO_RANGE_MASK) << 8;
if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) {
u16 io_base_hi, io_limit_hi;
pci_read_config_word(dev, PCI_IO_BASE_UPPER16, &io_base_hi);
pci_read_config_word(dev, PCI_IO_LIMIT_UPPER16, &io_limit_hi);
base |= (io_base_hi << 16);
limit |= (io_limit_hi << 16);
}
if (base && base <= limit) {
res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
res->start = base;
res->end = limit + 0xfff;
res->name = child->name;
} else {
/*
* Ugh. We don't know enough about this bridge. Just assume
* that it's entirely transparent.
*/
printk(KERN_ERR "Unknown bridge resource %d: assuming transparent\n", 0);
child->resource[0] = child->parent->resource[0];
}
res = child->resource[1];
pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo);
pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo);
base = (mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16;
limit = (mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16;
if (base && base <= limit) {
res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
res->start = base;
res->end = limit + 0xfffff;
res->name = child->name;
} else {
/* See comment above. Same thing */
printk(KERN_ERR "Unknown bridge resource %d: assuming transparent\n", 1);
child->resource[1] = child->parent->resource[1];
}
res = child->resource[2];
pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo);
base = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16;
limit = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16;
if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) {
u32 mem_base_hi, mem_limit_hi;
pci_read_config_dword(dev, PCI_PREF_BASE_UPPER32, &mem_base_hi);
pci_read_config_dword(dev, PCI_PREF_LIMIT_UPPER32, &mem_limit_hi);
#if BITS_PER_LONG == 64
base |= ((long) mem_base_hi) << 32;
limit |= ((long) mem_limit_hi) << 32;
#else
if (mem_base_hi || mem_limit_hi) {
printk(KERN_ERR "PCI: Unable to handle 64-bit address space for %s\n", child->name);
return;
}
#endif
}
if (base && base <= limit) {
res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH;
res->start = base;
res->end = limit + 0xfffff;
res->name = child->name;
} else {
/* See comments above */
printk(KERN_ERR "Unknown bridge resource %d: assuming transparent\n", 2);
child->resource[2] = child->parent->resource[2];
}
}
static struct pci_bus * __devinit pci_alloc_bus(void)
{
struct pci_bus *b;
b = kmalloc(sizeof(*b), GFP_KERNEL);
if (b) {
memset(b, 0, sizeof(*b));
INIT_LIST_HEAD(&b->children);
INIT_LIST_HEAD(&b->devices);
}
return b;
}
struct pci_bus * __devinit pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr)
{
struct pci_bus *child;
int i;
/*
* Allocate a new bus, and inherit stuff from the parent..
*/
child = pci_alloc_bus();
list_add_tail(&child->node, &parent->children);
child->self = dev;
dev->subordinate = child;
child->parent = parent;
child->ops = parent->ops;
child->sysdata = parent->sysdata;
child->dev = &dev->dev;
/*
* Set up the primary, secondary and subordinate
* bus numbers.
*/
child->number = child->secondary = busnr;
child->primary = parent->secondary;
child->subordinate = 0xff;
/* Set up default resource pointers.. */
for (i = 0; i < 4; i++)
child->resource[i] = &dev->resource[PCI_BRIDGE_RESOURCES+i];
return child;
}
unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus);
/*
* If it's a bridge, configure it and scan the bus behind it.
* For CardBus bridges, we don't scan behind as the devices will
* be handled by the bridge driver itself.
*
* We need to process bridges in two passes -- first we scan those
* already configured by the BIOS and after we are done with all of
* them, we proceed to assigning numbers to the remaining buses in
* order to avoid overlaps between old and new bus numbers.
*/
static int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass)
{
unsigned int buses;
unsigned short cr;
struct pci_bus *child;
int is_cardbus = (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS);
pci_read_config_dword(dev, PCI_PRIMARY_BUS, &buses);
DBG("Scanning behind PCI bridge %s, config %06x, pass %d\n", dev->slot_name, buses & 0xffffff, pass);
if ((buses & 0xffff00) && !pcibios_assign_all_busses()) {
/*
* Bus already configured by firmware, process it in the first
* pass and just note the configuration.
*/
if (pass)
return max;
child = pci_add_new_bus(bus, dev, 0);
child->primary = buses & 0xFF;
child->secondary = (buses >> 8) & 0xFF;
child->subordinate = (buses >> 16) & 0xFF;
child->number = child->secondary;
if (!is_cardbus) {
unsigned int cmax = pci_do_scan_bus(child);
if (cmax > max) max = cmax;
} else {
unsigned int cmax = child->subordinate;
if (cmax > max) max = cmax;
}
} else {
/*
* We need to assign a number to this bus which we always
* do in the second pass. We also keep all address decoders
* on the bridge disabled during scanning. FIXME: Why?
*/
if (!pass)
return max;
pci_read_config_word(dev, PCI_COMMAND, &cr);
pci_write_config_word(dev, PCI_COMMAND, 0x0000);
pci_write_config_word(dev, PCI_STATUS, 0xffff);
child = pci_add_new_bus(bus, dev, ++max);
buses = (buses & 0xff000000)
| ((unsigned int)(child->primary) << 0)
| ((unsigned int)(child->secondary) << 8)
| ((unsigned int)(child->subordinate) << 16);
/*
* We need to blast all three values with a single write.
*/
pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses);
if (!is_cardbus) {
/* Now we can scan all subordinate buses... */
max = pci_do_scan_bus(child);
} else {
/*
* For CardBus bridges, we leave 4 bus numbers
* as cards with a PCI-to-PCI bridge can be
* inserted later.
*/
max += 3;
}
/*
* Set the subordinate bus number to its real value.
*/
child->subordinate = max;
pci_write_config_byte(dev, PCI_SUBORDINATE_BUS, max);
pci_write_config_word(dev, PCI_COMMAND, cr);
}
sprintf(child->name, (is_cardbus ? "PCI CardBus #%02x" : "PCI Bus #%02x"), child->number);
return max;
}
/*
* Read interrupt line and base address registers.
* The architecture-dependent code can tweak these, of course.
*/
static void pci_read_irq(struct pci_dev *dev)
{
unsigned char irq;
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq);
if (irq)
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
dev->irq = irq;
}
/**
* pci_setup_device - fill in class and map information of a device
* @dev: the device structure to fill
*
* Initialize the device structure with information about the device's
* vendor,class,memory and IO-space addresses,IRQ lines etc.
* Called at initialisation of the PCI subsystem and by CardBus services.
* Returns 0 on success and -1 if unknown type of device (not normal, bridge
* or CardBus).
*/
int pci_setup_device(struct pci_dev * dev)
{
u32 class;
sprintf(dev->slot_name, "%02x:%02x.%d", dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
sprintf(dev->name, "PCI device %04x:%04x", dev->vendor, dev->device);
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
class >>= 8; /* upper 3 bytes */
dev->class = class;
class >>= 8;
DBG("Found %02x:%02x [%04x/%04x] %06x %02x\n", dev->bus->number, dev->devfn, dev->vendor, dev->device, class, dev->hdr_type);
/* "Unknown power state" */
dev->current_state = 4;
switch (dev->hdr_type) { /* header type */
case PCI_HEADER_TYPE_NORMAL: /* standard header */
if (class == PCI_CLASS_BRIDGE_PCI)
goto bad;
pci_read_irq(dev);
pci_read_bases(dev, 6, PCI_ROM_ADDRESS);
pci_read_config_word(dev, PCI_SUBSYSTEM_VENDOR_ID, &dev->subsystem_vendor);
pci_read_config_word(dev, PCI_SUBSYSTEM_ID, &dev->subsystem_device);
break;
case PCI_HEADER_TYPE_BRIDGE: /* bridge header */
if (class != PCI_CLASS_BRIDGE_PCI)
goto bad;
pci_read_bases(dev, 2, PCI_ROM_ADDRESS1);
break;
case PCI_HEADER_TYPE_CARDBUS: /* CardBus bridge header */
if (class != PCI_CLASS_BRIDGE_CARDBUS)
goto bad;
pci_read_irq(dev);
pci_read_bases(dev, 1, 0);
pci_read_config_word(dev, PCI_CB_SUBSYSTEM_VENDOR_ID, &dev->subsystem_vendor);
pci_read_config_word(dev, PCI_CB_SUBSYSTEM_ID, &dev->subsystem_device);
break;
default: /* unknown header */
printk(KERN_ERR "PCI: device %s has unknown header type %02x, ignoring.\n",
dev->slot_name, dev->hdr_type);
return -1;
bad:
printk(KERN_ERR "PCI: %s: class %x doesn't match header type %02x. Ignoring class.\n",
dev->slot_name, class, dev->hdr_type);
dev->class = PCI_CLASS_NOT_DEFINED;
}
/* We found a fine healthy device, go go go... */
return 0;
}
/*
* Read the config data for a PCI device, sanity-check it
* and fill in the dev structure...
*/
struct pci_dev * __devinit pci_scan_device(struct pci_dev *temp)
{
struct pci_dev *dev;
u32 l;
if (pci_read_config_dword(temp, PCI_VENDOR_ID, &l))
return NULL;
/* some broken boards return 0 or ~0 if a slot is empty: */
if (l == 0xffffffff || l == 0x00000000 || l == 0x0000ffff || l == 0xffff0000)
return NULL;
dev = kmalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
memcpy(dev, temp, sizeof(*dev));
dev->vendor = l & 0xffff;
dev->device = (l >> 16) & 0xffff;
/* Assume 32-bit PCI; let 64-bit PCI cards (which are far rarer)
set this higher, assuming the system even supports it. */
dev->dma_mask = 0xffffffff;
if (pci_setup_device(dev) < 0) {
kfree(dev);
return NULL;
}
/* now put in global tree */
strcpy(dev->dev.name,dev->name);
strcpy(dev->dev.bus_id,dev->slot_name);
device_register(&dev->dev);
return dev;
}
struct pci_dev * __devinit pci_scan_slot(struct pci_dev *temp)
{
struct pci_bus *bus = temp->bus;
struct pci_dev *dev;
struct pci_dev *first_dev = NULL;
int func = 0;
int is_multi = 0;
u8 hdr_type;
for (func = 0; func < 8; func++, temp->devfn++) {
if (func && !is_multi) /* not a multi-function device */
continue;
if (pci_read_config_byte(temp, PCI_HEADER_TYPE, &hdr_type))
continue;
temp->hdr_type = hdr_type & 0x7f;
dev = pci_scan_device(temp);
if (!dev)
continue;
pci_name_device(dev);
if (!func) {
is_multi = hdr_type & 0x80;
first_dev = dev;
}
/*
* Link the device to both the global PCI device chain and
* the per-bus list of devices.
*/
list_add_tail(&dev->global_list, &pci_devices);
list_add_tail(&dev->bus_list, &bus->devices);
/* Fix up broken headers */
pci_fixup_device(PCI_FIXUP_HEADER, dev);
}
return first_dev;
}
unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus)
{
unsigned int devfn, max, pass;
struct list_head *ln;
struct pci_dev *dev, dev0;
DBG("Scanning bus %02x\n", bus->number);
max = bus->secondary;
/* Create a device template */
memset(&dev0, 0, sizeof(dev0));
dev0.bus = bus;
dev0.sysdata = bus->sysdata;
dev0.dev.parent = bus->dev;
dev0.dev.driver = &pci_device_driver;
/* Go find them, Rover! */
for (devfn = 0; devfn < 0x100; devfn += 8) {
dev0.devfn = devfn;
pci_scan_slot(&dev0);
}
/*
* After performing arch-dependent fixup of the bus, look behind
* all PCI-to-PCI bridges on this bus.
*/
DBG("Fixups for bus %02x\n", bus->number);
pcibios_fixup_bus(bus);
for (pass=0; pass < 2; pass++)
for (ln=bus->devices.next; ln != &bus->devices; ln=ln->next) {
dev = pci_dev_b(ln);
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
max = pci_scan_bridge(bus, dev, max, pass);
}
/*
* We've scanned the bus and so we know all about what's on
* the other side of any bridges that may be on this bus plus
* any devices.
*
* Return how far we've got finding sub-buses.
*/
DBG("Bus scan for %02x returning with max=%02x\n", bus->number, max);
return max;
}
int __devinit pci_bus_exists(const struct list_head *list, int nr)
{
const struct list_head *l;
for(l=list->next; l != list; l = l->next) {
const struct pci_bus *b = pci_bus_b(l);
if (b->number == nr || pci_bus_exists(&b->children, nr))
return 1;
}
return 0;
}
struct pci_bus * __devinit pci_alloc_primary_bus(int bus)
{
struct pci_bus *b;
if (pci_bus_exists(&pci_root_buses, bus)) {
/* If we already got to this bus through a different bridge, ignore it */
DBG("PCI: Bus %02x already known\n", bus);
return NULL;
}
b = pci_alloc_bus();
if (!b)
return NULL;
list_add_tail(&b->node, &pci_root_buses);
b->dev = kmalloc(sizeof(*(b->dev)),GFP_KERNEL);
memset(b->dev,0,sizeof(*(b->dev)));
sprintf(b->dev->bus_id,"pci%d",bus);
strcpy(b->dev->name,"Host/PCI Bridge");
device_register(b->dev);
b->number = b->secondary = bus;
b->resource[0] = &ioport_resource;
b->resource[1] = &iomem_resource;
return b;
}
struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
{
struct pci_bus *b = pci_alloc_primary_bus(bus);
if (b) {
b->sysdata = sysdata;
b->ops = ops;
b->subordinate = pci_do_scan_bus(b);
}
return b;
}
EXPORT_SYMBOL(pci_devices);
EXPORT_SYMBOL(pci_root_buses);
#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL(pci_setup_device);
EXPORT_SYMBOL(pci_add_new_bus);
EXPORT_SYMBOL(pci_do_scan_bus);
EXPORT_SYMBOL(pci_scan_slot);
#endif
...@@ -6,11 +6,9 @@ ...@@ -6,11 +6,9 @@
* Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz> * Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz>
*/ */
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/module.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/seq_file.h> #include <linux/seq_file.h>
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
...@@ -615,3 +613,11 @@ static int __init pci_proc_init(void) ...@@ -615,3 +613,11 @@ static int __init pci_proc_init(void)
} }
__initcall(pci_proc_init); __initcall(pci_proc_init);
#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL(pci_proc_attach_device);
EXPORT_SYMBOL(pci_proc_detach_device);
EXPORT_SYMBOL(pci_proc_attach_bus);
EXPORT_SYMBOL(pci_proc_detach_bus);
#endif
#include <linux/pci.h>
#include <linux/module.h>
/**
* pci_find_slot - locate PCI device from a given PCI slot
* @bus: number of PCI bus on which desired PCI device resides
* @devfn: encodes number of PCI slot in which the desired PCI
* device resides and the logical device number within that slot
* in case of multi-function devices.
*
* Given a PCI bus and slot/function number, the desired PCI device
* is located in system global list of PCI devices. If the device
* is found, a pointer to its data structure is returned. If no
* device is found, %NULL is returned.
*/
struct pci_dev *
pci_find_slot(unsigned int bus, unsigned int devfn)
{
struct pci_dev *dev;
pci_for_each_dev(dev) {
if (dev->bus->number == bus && dev->devfn == devfn)
return dev;
}
return NULL;
}
/**
* pci_find_subsys - begin or continue searching for a PCI device by vendor/subvendor/device/subdevice id
* @vendor: PCI vendor id to match, or %PCI_ANY_ID to match all vendor ids
* @device: PCI device id to match, or %PCI_ANY_ID to match all device ids
* @ss_vendor: PCI subsystem vendor id to match, or %PCI_ANY_ID to match all vendor ids
* @ss_device: PCI subsystem device id to match, or %PCI_ANY_ID to match all device ids
* @from: Previous PCI device found in search, or %NULL for new search.
*
* Iterates through the list of known PCI devices. If a PCI device is
* found with a matching @vendor, @device, @ss_vendor and @ss_device, a pointer to its
* device structure is returned. Otherwise, %NULL is returned.
* A new search is initiated by passing %NULL to the @from argument.
* Otherwise if @from is not %NULL, searches continue from next device on the global list.
*/
struct pci_dev *
pci_find_subsys(unsigned int vendor, unsigned int device,
unsigned int ss_vendor, unsigned int ss_device,
const struct pci_dev *from)
{
struct list_head *n = from ? from->global_list.next : pci_devices.next;
while (n != &pci_devices) {
struct pci_dev *dev = pci_dev_g(n);
if ((vendor == PCI_ANY_ID || dev->vendor == vendor) &&
(device == PCI_ANY_ID || dev->device == device) &&
(ss_vendor == PCI_ANY_ID || dev->subsystem_vendor == ss_vendor) &&
(ss_device == PCI_ANY_ID || dev->subsystem_device == ss_device))
return dev;
n = n->next;
}
return NULL;
}
/**
* pci_find_device - begin or continue searching for a PCI device by vendor/device id
* @vendor: PCI vendor id to match, or %PCI_ANY_ID to match all vendor ids
* @device: PCI device id to match, or %PCI_ANY_ID to match all device ids
* @from: Previous PCI device found in search, or %NULL for new search.
*
* Iterates through the list of known PCI devices. If a PCI device is
* found with a matching @vendor and @device, a pointer to its device structure is
* returned. Otherwise, %NULL is returned.
* A new search is initiated by passing %NULL to the @from argument.
* Otherwise if @from is not %NULL, searches continue from next device on the global list.
*/
struct pci_dev *
pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
{
return pci_find_subsys(vendor, device, PCI_ANY_ID, PCI_ANY_ID, from);
}
/**
* pci_find_class - begin or continue searching for a PCI device by class
* @class: search for a PCI device with this class designation
* @from: Previous PCI device found in search, or %NULL for new search.
*
* Iterates through the list of known PCI devices. If a PCI device is
* found with a matching @class, a pointer to its device structure is
* returned. Otherwise, %NULL is returned.
* A new search is initiated by passing %NULL to the @from argument.
* Otherwise if @from is not %NULL, searches continue from next device
* on the global list.
*/
struct pci_dev *
pci_find_class(unsigned int class, const struct pci_dev *from)
{
struct list_head *n = from ? from->global_list.next : pci_devices.next;
while (n != &pci_devices) {
struct pci_dev *dev = pci_dev_g(n);
if (dev->class == class)
return dev;
n = n->next;
}
return NULL;
}
EXPORT_SYMBOL(pci_find_class);
EXPORT_SYMBOL(pci_find_device);
EXPORT_SYMBOL(pci_find_slot);
EXPORT_SYMBOL(pci_find_subsys);
...@@ -495,7 +495,6 @@ struct pci_driver { ...@@ -495,7 +495,6 @@ struct pci_driver {
#define pci_for_each_dev(dev) \ #define pci_for_each_dev(dev) \
for(dev = pci_dev_g(pci_devices.next); dev != pci_dev_g(&pci_devices); dev = pci_dev_g(dev->global_list.next)) for(dev = pci_dev_g(pci_devices.next); dev != pci_dev_g(&pci_devices); dev = pci_dev_g(dev->global_list.next))
void pcibios_init(void);
void pcibios_fixup_bus(struct pci_bus *); void pcibios_fixup_bus(struct pci_bus *);
int pcibios_enable_device(struct pci_dev *); int pcibios_enable_device(struct pci_dev *);
char *pcibios_setup (char *str); char *pcibios_setup (char *str);
......
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