379 lines
9.7 KiB
C
379 lines
9.7 KiB
C
/*
|
|
* eeh.h
|
|
* Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _PPC64_EEH_H
|
|
#define _PPC64_EEH_H
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/init.h>
|
|
#include <linux/list.h>
|
|
#include <linux/string.h>
|
|
|
|
struct pci_dev;
|
|
struct device_node;
|
|
|
|
#ifdef CONFIG_EEH
|
|
|
|
extern int eeh_subsystem_enabled;
|
|
|
|
/* Values for eeh_mode bits in device_node */
|
|
#define EEH_MODE_SUPPORTED (1<<0)
|
|
#define EEH_MODE_NOCHECK (1<<1)
|
|
#define EEH_MODE_ISOLATED (1<<2)
|
|
|
|
/* Max number of EEH freezes allowed before we consider the device
|
|
* to be permanently disabled. */
|
|
#define EEH_MAX_ALLOWED_FREEZES 5
|
|
|
|
void __init eeh_init(void);
|
|
unsigned long eeh_check_failure(const volatile void __iomem *token,
|
|
unsigned long val);
|
|
int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev);
|
|
void __init pci_addr_cache_build(void);
|
|
|
|
/**
|
|
* eeh_add_device_early
|
|
* eeh_add_device_late
|
|
*
|
|
* Perform eeh initialization for devices added after boot.
|
|
* Call eeh_add_device_early before doing any i/o to the
|
|
* device (including config space i/o). Call eeh_add_device_late
|
|
* to finish the eeh setup for this device.
|
|
*/
|
|
void eeh_add_device_early(struct device_node *);
|
|
void eeh_add_device_tree_early(struct device_node *);
|
|
void eeh_add_device_late(struct pci_dev *);
|
|
|
|
/**
|
|
* eeh_remove_device - undo EEH setup for the indicated pci device
|
|
* @dev: pci device to be removed
|
|
*
|
|
* This routine should be called when a device is removed from
|
|
* a running system (e.g. by hotplug or dlpar). It unregisters
|
|
* the PCI device from the EEH subsystem. I/O errors affecting
|
|
* this device will no longer be detected after this call; thus,
|
|
* i/o errors affecting this slot may leave this device unusable.
|
|
*/
|
|
void eeh_remove_device(struct pci_dev *);
|
|
|
|
/**
|
|
* eeh_remove_device_recursive - undo EEH for device & children.
|
|
* @dev: pci device to be removed
|
|
*
|
|
* As above, this removes the device; it also removes child
|
|
* pci devices as well.
|
|
*/
|
|
void eeh_remove_bus_device(struct pci_dev *);
|
|
|
|
/**
|
|
* EEH_POSSIBLE_ERROR() -- test for possible MMIO failure.
|
|
*
|
|
* If this macro yields TRUE, the caller relays to eeh_check_failure()
|
|
* which does further tests out of line.
|
|
*/
|
|
#define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_subsystem_enabled)
|
|
|
|
/*
|
|
* Reads from a device which has been isolated by EEH will return
|
|
* all 1s. This macro gives an all-1s value of the given size (in
|
|
* bytes: 1, 2, or 4) for comparing with the result of a read.
|
|
*/
|
|
#define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8))
|
|
|
|
#else /* !CONFIG_EEH */
|
|
static inline void eeh_init(void) { }
|
|
|
|
static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val)
|
|
{
|
|
return val;
|
|
}
|
|
|
|
static inline int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void pci_addr_cache_build(void) { }
|
|
|
|
static inline void eeh_add_device_early(struct device_node *dn) { }
|
|
|
|
static inline void eeh_add_device_late(struct pci_dev *dev) { }
|
|
|
|
static inline void eeh_remove_device(struct pci_dev *dev) { }
|
|
|
|
#define EEH_POSSIBLE_ERROR(val, type) (0)
|
|
#define EEH_IO_ERROR_VALUE(size) (-1UL)
|
|
#endif /* CONFIG_EEH */
|
|
|
|
/*
|
|
* MMIO read/write operations with EEH support.
|
|
*/
|
|
static inline u8 eeh_readb(const volatile void __iomem *addr)
|
|
{
|
|
u8 val = in_8(addr);
|
|
if (EEH_POSSIBLE_ERROR(val, u8))
|
|
return eeh_check_failure(addr, val);
|
|
return val;
|
|
}
|
|
static inline void eeh_writeb(u8 val, volatile void __iomem *addr)
|
|
{
|
|
out_8(addr, val);
|
|
}
|
|
|
|
static inline u16 eeh_readw(const volatile void __iomem *addr)
|
|
{
|
|
u16 val = in_le16(addr);
|
|
if (EEH_POSSIBLE_ERROR(val, u16))
|
|
return eeh_check_failure(addr, val);
|
|
return val;
|
|
}
|
|
static inline void eeh_writew(u16 val, volatile void __iomem *addr)
|
|
{
|
|
out_le16(addr, val);
|
|
}
|
|
static inline u16 eeh_raw_readw(const volatile void __iomem *addr)
|
|
{
|
|
u16 val = in_be16(addr);
|
|
if (EEH_POSSIBLE_ERROR(val, u16))
|
|
return eeh_check_failure(addr, val);
|
|
return val;
|
|
}
|
|
static inline void eeh_raw_writew(u16 val, volatile void __iomem *addr) {
|
|
volatile u16 __iomem *vaddr = (volatile u16 __iomem *) addr;
|
|
out_be16(vaddr, val);
|
|
}
|
|
|
|
static inline u32 eeh_readl(const volatile void __iomem *addr)
|
|
{
|
|
u32 val = in_le32(addr);
|
|
if (EEH_POSSIBLE_ERROR(val, u32))
|
|
return eeh_check_failure(addr, val);
|
|
return val;
|
|
}
|
|
static inline void eeh_writel(u32 val, volatile void __iomem *addr)
|
|
{
|
|
out_le32(addr, val);
|
|
}
|
|
static inline u32 eeh_raw_readl(const volatile void __iomem *addr)
|
|
{
|
|
u32 val = in_be32(addr);
|
|
if (EEH_POSSIBLE_ERROR(val, u32))
|
|
return eeh_check_failure(addr, val);
|
|
return val;
|
|
}
|
|
static inline void eeh_raw_writel(u32 val, volatile void __iomem *addr)
|
|
{
|
|
out_be32(addr, val);
|
|
}
|
|
|
|
static inline u64 eeh_readq(const volatile void __iomem *addr)
|
|
{
|
|
u64 val = in_le64(addr);
|
|
if (EEH_POSSIBLE_ERROR(val, u64))
|
|
return eeh_check_failure(addr, val);
|
|
return val;
|
|
}
|
|
static inline void eeh_writeq(u64 val, volatile void __iomem *addr)
|
|
{
|
|
out_le64(addr, val);
|
|
}
|
|
static inline u64 eeh_raw_readq(const volatile void __iomem *addr)
|
|
{
|
|
u64 val = in_be64(addr);
|
|
if (EEH_POSSIBLE_ERROR(val, u64))
|
|
return eeh_check_failure(addr, val);
|
|
return val;
|
|
}
|
|
static inline void eeh_raw_writeq(u64 val, volatile void __iomem *addr)
|
|
{
|
|
out_be64(addr, val);
|
|
}
|
|
|
|
#define EEH_CHECK_ALIGN(v,a) \
|
|
((((unsigned long)(v)) & ((a) - 1)) == 0)
|
|
|
|
static inline void eeh_memset_io(volatile void __iomem *addr, int c,
|
|
unsigned long n)
|
|
{
|
|
void *p = (void __force *)addr;
|
|
u32 lc = c;
|
|
lc |= lc << 8;
|
|
lc |= lc << 16;
|
|
|
|
while(n && !EEH_CHECK_ALIGN(p, 4)) {
|
|
*((volatile u8 *)p) = c;
|
|
p++;
|
|
n--;
|
|
}
|
|
while(n >= 4) {
|
|
*((volatile u32 *)p) = lc;
|
|
p += 4;
|
|
n -= 4;
|
|
}
|
|
while(n) {
|
|
*((volatile u8 *)p) = c;
|
|
p++;
|
|
n--;
|
|
}
|
|
__asm__ __volatile__ ("sync" : : : "memory");
|
|
}
|
|
static inline void eeh_memcpy_fromio(void *dest, const volatile void __iomem *src,
|
|
unsigned long n)
|
|
{
|
|
void *vsrc = (void __force *) src;
|
|
void *destsave = dest;
|
|
unsigned long nsave = n;
|
|
|
|
while(n && (!EEH_CHECK_ALIGN(vsrc, 4) || !EEH_CHECK_ALIGN(dest, 4))) {
|
|
*((u8 *)dest) = *((volatile u8 *)vsrc);
|
|
__asm__ __volatile__ ("eieio" : : : "memory");
|
|
vsrc++;
|
|
dest++;
|
|
n--;
|
|
}
|
|
while(n > 4) {
|
|
*((u32 *)dest) = *((volatile u32 *)vsrc);
|
|
__asm__ __volatile__ ("eieio" : : : "memory");
|
|
vsrc += 4;
|
|
dest += 4;
|
|
n -= 4;
|
|
}
|
|
while(n) {
|
|
*((u8 *)dest) = *((volatile u8 *)vsrc);
|
|
__asm__ __volatile__ ("eieio" : : : "memory");
|
|
vsrc++;
|
|
dest++;
|
|
n--;
|
|
}
|
|
__asm__ __volatile__ ("sync" : : : "memory");
|
|
|
|
/* Look for ffff's here at dest[n]. Assume that at least 4 bytes
|
|
* were copied. Check all four bytes.
|
|
*/
|
|
if ((nsave >= 4) &&
|
|
(EEH_POSSIBLE_ERROR((*((u32 *) destsave+nsave-4)), u32))) {
|
|
eeh_check_failure(src, (*((u32 *) destsave+nsave-4)));
|
|
}
|
|
}
|
|
|
|
static inline void eeh_memcpy_toio(volatile void __iomem *dest, const void *src,
|
|
unsigned long n)
|
|
{
|
|
void *vdest = (void __force *) dest;
|
|
|
|
while(n && (!EEH_CHECK_ALIGN(vdest, 4) || !EEH_CHECK_ALIGN(src, 4))) {
|
|
*((volatile u8 *)vdest) = *((u8 *)src);
|
|
src++;
|
|
vdest++;
|
|
n--;
|
|
}
|
|
while(n > 4) {
|
|
*((volatile u32 *)vdest) = *((volatile u32 *)src);
|
|
src += 4;
|
|
vdest += 4;
|
|
n-=4;
|
|
}
|
|
while(n) {
|
|
*((volatile u8 *)vdest) = *((u8 *)src);
|
|
src++;
|
|
vdest++;
|
|
n--;
|
|
}
|
|
__asm__ __volatile__ ("sync" : : : "memory");
|
|
}
|
|
|
|
#undef EEH_CHECK_ALIGN
|
|
|
|
static inline u8 eeh_inb(unsigned long port)
|
|
{
|
|
u8 val;
|
|
if (!_IO_IS_VALID(port))
|
|
return ~0;
|
|
val = in_8((u8 __iomem *)(port+pci_io_base));
|
|
if (EEH_POSSIBLE_ERROR(val, u8))
|
|
return eeh_check_failure((void __iomem *)(port), val);
|
|
return val;
|
|
}
|
|
|
|
static inline void eeh_outb(u8 val, unsigned long port)
|
|
{
|
|
if (_IO_IS_VALID(port))
|
|
out_8((u8 __iomem *)(port+pci_io_base), val);
|
|
}
|
|
|
|
static inline u16 eeh_inw(unsigned long port)
|
|
{
|
|
u16 val;
|
|
if (!_IO_IS_VALID(port))
|
|
return ~0;
|
|
val = in_le16((u16 __iomem *)(port+pci_io_base));
|
|
if (EEH_POSSIBLE_ERROR(val, u16))
|
|
return eeh_check_failure((void __iomem *)(port), val);
|
|
return val;
|
|
}
|
|
|
|
static inline void eeh_outw(u16 val, unsigned long port)
|
|
{
|
|
if (_IO_IS_VALID(port))
|
|
out_le16((u16 __iomem *)(port+pci_io_base), val);
|
|
}
|
|
|
|
static inline u32 eeh_inl(unsigned long port)
|
|
{
|
|
u32 val;
|
|
if (!_IO_IS_VALID(port))
|
|
return ~0;
|
|
val = in_le32((u32 __iomem *)(port+pci_io_base));
|
|
if (EEH_POSSIBLE_ERROR(val, u32))
|
|
return eeh_check_failure((void __iomem *)(port), val);
|
|
return val;
|
|
}
|
|
|
|
static inline void eeh_outl(u32 val, unsigned long port)
|
|
{
|
|
if (_IO_IS_VALID(port))
|
|
out_le32((u32 __iomem *)(port+pci_io_base), val);
|
|
}
|
|
|
|
/* in-string eeh macros */
|
|
static inline void eeh_insb(unsigned long port, void * buf, int ns)
|
|
{
|
|
_insb((u8 __iomem *)(port+pci_io_base), buf, ns);
|
|
if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8))
|
|
eeh_check_failure((void __iomem *)(port), *(u8*)buf);
|
|
}
|
|
|
|
static inline void eeh_insw_ns(unsigned long port, void * buf, int ns)
|
|
{
|
|
_insw_ns((u16 __iomem *)(port+pci_io_base), buf, ns);
|
|
if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16))
|
|
eeh_check_failure((void __iomem *)(port), *(u16*)buf);
|
|
}
|
|
|
|
static inline void eeh_insl_ns(unsigned long port, void * buf, int nl)
|
|
{
|
|
_insl_ns((u32 __iomem *)(port+pci_io_base), buf, nl);
|
|
if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32))
|
|
eeh_check_failure((void __iomem *)(port), *(u32*)buf);
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _PPC64_EEH_H */
|