| /* |
| * 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 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 */ |