| /* |
| * 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 |
| */ |
| |
| /* Start Change Log |
| * 2001/10/27 : engebret : Created. |
| * End Change Log |
| */ |
| |
| #ifndef _EEH_H |
| #define _EEH_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) |
| |
| /* This is for profiling only */ |
| extern unsigned long eeh_total_mmio_ffs; |
| |
| void eeh_init(void); |
| int eeh_get_state(unsigned long ea); |
| unsigned long eeh_check_failure(void *token, unsigned long val); |
| void *eeh_ioremap(unsigned long addr, void *vaddr); |
| |
| #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); |
| |
| /* Given a PCI device check if eeh should be configured or not. |
| * This may look at firmware properties and/or kernel cmdline options. |
| */ |
| int is_eeh_configured(struct pci_dev *dev); |
| |
| /* Translate a (possible) eeh token to a physical addr. |
| * If "token" is not an eeh token it is simply returned under |
| * the assumption that it is already a physical addr. |
| */ |
| unsigned long eeh_token_to_phys(unsigned long token); |
| |
| extern void *memcpy(void *, const void *, unsigned long); |
| extern void *memset(void *,int, unsigned long); |
| |
| /* 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) (~(val) == 0) */ |
| /* #define EEH_POSSIBLE_ERROR(addr, vaddr, val) ((vaddr) != (addr) && EEH_POSSIBLE_IO_ERROR(val) */ |
| /* This version is rearranged to collect some profiling data */ |
| #define EEH_POSSIBLE_IO_ERROR(val, type) \ |
| ((val) == (type)~0 && ++eeh_total_mmio_ffs) |
| #define EEH_POSSIBLE_ERROR(addr, vaddr, val, type) \ |
| (EEH_POSSIBLE_IO_ERROR(val, type) && (vaddr) != (addr)) |
| |
| /* |
| * MMIO read/write operations with EEH support. |
| * |
| * addr: 64b token of the form 0xA0PPBBDDyyyyyyyy |
| * 0xA0 : Unmapped MMIO region |
| * PP : PHB index (starting at zero) |
| * BB : PCI Bus number under given PHB |
| * DD : PCI devfn under given bus |
| * yyyyyyyy : Virtual address offset |
| * |
| * An actual virtual address is produced from this token |
| * by masking into the form: |
| * 0xE0000000yyyyyyyy |
| */ |
| 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 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] */ |
| } |
| 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); |
| } |
| |
| /* The I/O macros must handle ISA ports as well as PCI I/O bars. |
| * ISA does not implement EEH and ISA may not exist in the system. |
| * For PCI we check for EEH failures. |
| */ |
| #define _IO_IS_ISA(port) ((port) < 0x10000) |
| #define _IO_HAS_ISA_BUS (isa_io_base != 0) |
| |
| static inline u8 eeh_inb(unsigned long port) { |
| u8 val; |
| if (_IO_IS_ISA(port) && !_IO_HAS_ISA_BUS) |
| return ~0; |
| val = in_8((u8 *)(port+pci_io_base)); |
| if (!_IO_IS_ISA(port) && EEH_POSSIBLE_IO_ERROR(val, u8)) |
| return eeh_check_failure((void*)(port+pci_io_base), val); |
| return val; |
| } |
| |
| static inline void eeh_outb(u8 val, unsigned long port) { |
| if (!_IO_IS_ISA(port) || _IO_HAS_ISA_BUS) |
| return out_8((u8 *)(port+pci_io_base), val); |
| } |
| |
| static inline u16 eeh_inw(unsigned long port) { |
| u16 val; |
| if (_IO_IS_ISA(port) && !_IO_HAS_ISA_BUS) |
| return ~0; |
| val = in_le16((u16 *)(port+pci_io_base)); |
| if (!_IO_IS_ISA(port) && EEH_POSSIBLE_IO_ERROR(val, u16)) |
| return eeh_check_failure((void*)(port+pci_io_base), val); |
| return val; |
| } |
| |
| static inline void eeh_outw(u16 val, unsigned long port) { |
| if (!_IO_IS_ISA(port) || _IO_HAS_ISA_BUS) |
| return out_le16((u16 *)(port+pci_io_base), val); |
| } |
| |
| static inline u32 eeh_inl(unsigned long port) { |
| u32 val; |
| if (_IO_IS_ISA(port) && !_IO_HAS_ISA_BUS) |
| return ~0; |
| val = in_le32((u32 *)(port+pci_io_base)); |
| if (!_IO_IS_ISA(port) && EEH_POSSIBLE_IO_ERROR(val, u32)) |
| return eeh_check_failure((void*)(port+pci_io_base), val); |
| return val; |
| } |
| |
| static inline void eeh_outl(u32 val, unsigned long port) { |
| if (!_IO_IS_ISA(port) || _IO_HAS_ISA_BUS) |
| return out_le32((u32 *)(port+pci_io_base), val); |
| } |
| |
| #endif /* _EEH_H */ |