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- /*
- * 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/init.h>
- #include <linux/list.h>
- #include <linux/string.h>
-
- struct pci_dev;
- struct pci_bus;
- 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)
- #define EEH_MODE_RECOVERING (1<<3)
- #define EEH_MODE_IRQ_DISABLED (1<<4)
-
- /* 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_tree_early(struct device_node *);
- void eeh_add_device_tree_late(struct pci_bus *);
-
- /**
- * 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_tree_early(struct device_node *dn) { }
-
- static inline void eeh_add_device_tree_late(struct pci_bus *bus) { }
-
- static inline void eeh_remove_bus_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 */
-