| /* |
| * 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 |
| |
| #include <linux/string.h> |
| #include <linux/init.h> |
| |
| struct pci_dev; |
| |
| /* I/O addresses are converted to EEH "tokens" such that a driver will cause |
| * a bad page fault if the address is used directly (i.e. these addresses are |
| * never actually mapped. Translation between IO <-> EEH region is 1 to 1. |
| */ |
| #define IO_TOKEN_TO_ADDR(token) \ |
| (((unsigned long)(token) & ~(0xfUL << REGION_SHIFT)) | \ |
| (IO_REGION_ID << REGION_SHIFT)) |
| |
| #define IO_ADDR_TO_TOKEN(addr) \ |
| (((unsigned long)(addr) & ~(0xfUL << REGION_SHIFT)) | \ |
| (EEH_REGION_ID << REGION_SHIFT)) |
| |
| /* Values for eeh_mode bits in device_node */ |
| #define EEH_MODE_SUPPORTED (1<<0) |
| #define EEH_MODE_NOCHECK (1<<1) |
| |
| extern void __init eeh_init(void); |
| unsigned long eeh_check_failure(void *token, unsigned long val); |
| void *eeh_ioremap(unsigned long addr, void *vaddr); |
| void __init pci_addr_cache_build(void); |
| |
| /** |
| * eeh_add_device - perform EEH initialization for the indicated pci device |
| * @dev: pci device for which to set up EEH |
| * |
| * This routine can be used to perform EEH initialization for PCI |
| * devices that were added after system boot (e.g. hotplug, dlpar). |
| * Whether this actually enables EEH or not for this device depends |
| * on the type of the device, on earlier boot command-line |
| * arguments & etc. |
| */ |
| void eeh_add_device(struct pci_dev *); |
| |
| /** |
| * eeh_remove_device - undo EEH setup for the indicated pci device |
| * @dev: pci device to be removed |
| * |
| * This routine should be when a device is removed from a running |
| * system (e.g. by hotplug or dlpar). |
| */ |
| void eeh_remove_device(struct pci_dev *); |
| |
| #define EEH_DISABLE 0 |
| #define EEH_ENABLE 1 |
| #define EEH_RELEASE_LOADSTORE 2 |
| #define EEH_RELEASE_DMA 3 |
| int eeh_set_option(struct pci_dev *dev, int options); |
| |
| /* |
| * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. |
| * |
| * Order this macro for performance. |
| * If EEH is off for a device and it is a memory BAR, ioremap will |
| * map it to the IOREGION. In this case addr == vaddr and since these |
| * should be in registers we compare them first. Next we check for |
| * ff's which indicates a (very) possible failure. |
| * |
| * If this macro yields TRUE, the caller relays to eeh_check_failure() |
| * which does further tests out of line. |
| */ |
| #define EEH_POSSIBLE_IO_ERROR(val, type) ((val) == (type)~0) |
| |
| /* The vaddr will equal the addr if EEH checking is disabled for |
| * this device. This is because eeh_ioremap() will not have |
| * remapped to 0xA0, and thus both vaddr and addr will be 0xE0... |
| */ |
| #define EEH_POSSIBLE_ERROR(addr, vaddr, val, type) \ |
| ((vaddr) != (addr) && EEH_POSSIBLE_IO_ERROR(val, type)) |
| |
| /* |
| * MMIO read/write operations with EEH support. |
| */ |
| static inline u8 eeh_readb(void *addr) { |
| volatile u8 *vaddr = (volatile u8 *)IO_TOKEN_TO_ADDR(addr); |
| u8 val = in_8(vaddr); |
| if (EEH_POSSIBLE_ERROR(addr, vaddr, val, u8)) |
| return eeh_check_failure(addr, val); |
| return val; |
| } |
| static inline void eeh_writeb(u8 val, void *addr) { |
| volatile u8 *vaddr = (volatile u8 *)IO_TOKEN_TO_ADDR(addr); |
| out_8(vaddr, val); |
| } |
| |
| static inline u16 eeh_readw(void *addr) { |
| volatile u16 *vaddr = (volatile u16 *)IO_TOKEN_TO_ADDR(addr); |
| u16 val = in_le16(vaddr); |
| if (EEH_POSSIBLE_ERROR(addr, vaddr, val, u16)) |
| return eeh_check_failure(addr, val); |
| return val; |
| } |
| static inline void eeh_writew(u16 val, void *addr) { |
| volatile u16 *vaddr = (volatile u16 *)IO_TOKEN_TO_ADDR(addr); |
| out_le16(vaddr, val); |
| } |
| static inline u16 eeh_raw_readw(void *addr) { |
| volatile u16 *vaddr = (volatile u16 *)IO_TOKEN_TO_ADDR(addr); |
| u16 val = in_be16(vaddr); |
| if (EEH_POSSIBLE_ERROR(addr, vaddr, val, u16)) |
| return eeh_check_failure(addr, val); |
| return val; |
| } |
| static inline void eeh_raw_writew(u16 val, void *addr) { |
| volatile u16 *vaddr = (volatile u16 *)IO_TOKEN_TO_ADDR(addr); |
| out_be16(vaddr, val); |
| } |
| |
| static inline u32 eeh_readl(void *addr) { |
| volatile u32 *vaddr = (volatile u32 *)IO_TOKEN_TO_ADDR(addr); |
| u32 val = in_le32(vaddr); |
| if (EEH_POSSIBLE_ERROR(addr, vaddr, val, u32)) |
| return eeh_check_failure(addr, val); |
| return val; |
| } |
| static inline void eeh_writel(u32 val, void *addr) { |
| volatile u32 *vaddr = (volatile u32 *)IO_TOKEN_TO_ADDR(addr); |
| out_le32(vaddr, val); |
| } |
| static inline u32 eeh_raw_readl(void *addr) { |
| volatile u32 *vaddr = (volatile u32 *)IO_TOKEN_TO_ADDR(addr); |
| u32 val = in_be32(vaddr); |
| if (EEH_POSSIBLE_ERROR(addr, vaddr, val, u32)) |
| return eeh_check_failure(addr, val); |
| return val; |
| } |
| static inline void eeh_raw_writel(u32 val, void *addr) { |
| volatile u32 *vaddr = (volatile u32 *)IO_TOKEN_TO_ADDR(addr); |
| out_be32(vaddr, val); |
| } |
| |
| static inline u64 eeh_readq(void *addr) { |
| volatile u64 *vaddr = (volatile u64 *)IO_TOKEN_TO_ADDR(addr); |
| u64 val = in_le64(vaddr); |
| if (EEH_POSSIBLE_ERROR(addr, vaddr, val, u64)) |
| return eeh_check_failure(addr, val); |
| return val; |
| } |
| static inline void eeh_writeq(u64 val, void *addr) { |
| volatile u64 *vaddr = (volatile u64 *)IO_TOKEN_TO_ADDR(addr); |
| out_le64(vaddr, val); |
| } |
| static inline u64 eeh_raw_readq(void *addr) { |
| volatile u64 *vaddr = (volatile u64 *)IO_TOKEN_TO_ADDR(addr); |
| u64 val = in_be64(vaddr); |
| if (EEH_POSSIBLE_ERROR(addr, vaddr, val, u64)) |
| return eeh_check_failure(addr, val); |
| return val; |
| } |
| static inline void eeh_raw_writeq(u64 val, void *addr) { |
| volatile u64 *vaddr = (volatile u64 *)IO_TOKEN_TO_ADDR(addr); |
| out_be64(vaddr, val); |
| } |
| |
| static inline void eeh_memset_io(void *addr, int c, unsigned long n) { |
| void *vaddr = (void *)IO_TOKEN_TO_ADDR(addr); |
| memset(vaddr, c, n); |
| } |
| static inline void eeh_memcpy_fromio(void *dest, void *src, unsigned long n) { |
| void *vsrc = (void *)IO_TOKEN_TO_ADDR(src); |
| memcpy(dest, vsrc, n); |
| /* Look for ffff's here at dest[n]. Assume that at least 4 bytes |
| * were copied. Check all four bytes. |
| */ |
| if ((n >= 4) && |
| (EEH_POSSIBLE_ERROR(src, vsrc, (*((u32 *) dest+n-4)), u32))) { |
| eeh_check_failure(src, (*((u32 *) dest+n-4))); |
| } |
| } |
| |
| static inline void eeh_memcpy_toio(void *dest, void *src, unsigned long n) { |
| void *vdest = (void *)IO_TOKEN_TO_ADDR(dest); |
| memcpy(vdest, src, n); |
| } |
| |
| #define MAX_ISA_PORT 0x10000 |
| extern unsigned long io_page_mask; |
| #define _IO_IS_VALID(port) ((port) >= MAX_ISA_PORT || (1 << (port>>PAGE_SHIFT)) & io_page_mask) |
| |
| static inline u8 eeh_inb(unsigned long port) { |
| u8 val; |
| if (!_IO_IS_VALID(port)) |
| return ~0; |
| val = in_8((u8 *)(port+pci_io_base)); |
| if (EEH_POSSIBLE_IO_ERROR(val, u8)) |
| return eeh_check_failure((void*)(port), val); |
| return val; |
| } |
| |
| static inline void eeh_outb(u8 val, unsigned long port) { |
| if (_IO_IS_VALID(port)) |
| return out_8((u8 *)(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 *)(port+pci_io_base)); |
| if (EEH_POSSIBLE_IO_ERROR(val, u16)) |
| return eeh_check_failure((void*)(port), val); |
| return val; |
| } |
| |
| static inline void eeh_outw(u16 val, unsigned long port) { |
| if (_IO_IS_VALID(port)) |
| return out_le16((u16 *)(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 *)(port+pci_io_base)); |
| if (EEH_POSSIBLE_IO_ERROR(val, u32)) |
| return eeh_check_failure((void*)(port), val); |
| return val; |
| } |
| |
| static inline void eeh_outl(u32 val, unsigned long port) { |
| if (_IO_IS_VALID(port)) |
| return out_le32((u32 *)(port+pci_io_base), val); |
| } |
| |
| /* in-string eeh macros */ |
| static inline void eeh_insb(unsigned long port, void * buf, int ns) { |
| _insb((u8 *)(port+pci_io_base), buf, ns); |
| if (EEH_POSSIBLE_IO_ERROR((*(((u8*)buf)+ns-1)), u8)) |
| eeh_check_failure((void*)(port), *(u8*)buf); |
| } |
| |
| static inline void eeh_insw_ns(unsigned long port, void * buf, int ns) { |
| _insw_ns((u16 *)(port+pci_io_base), buf, ns); |
| if (EEH_POSSIBLE_IO_ERROR((*(((u16*)buf)+ns-1)), u16)) |
| eeh_check_failure((void*)(port), *(u16*)buf); |
| } |
| |
| static inline void eeh_insl_ns(unsigned long port, void * buf, int nl) { |
| _insl_ns((u32 *)(port+pci_io_base), buf, nl); |
| if (EEH_POSSIBLE_IO_ERROR((*(((u32*)buf)+nl-1)), u32)) |
| eeh_check_failure((void*)(port), *(u32*)buf); |
| } |
| |
| #endif /* _PPC64_EEH_H */ |