eeh.h
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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
- */
- /* Start Change Log
- * 2001/10/27 : engebret : Created.
- * End Change Log
- */
- #ifndef _EEH_H
- #define _EEH_H
- struct pci_dev;
- #define IO_UNMAPPED_REGION_ID 0xaUL
- #define IO_TOKEN_TO_ADDR(token) ((((unsigned long)(token)) & 0xFFFFFFFF) | (0xEUL << 60))
- /* Flag bits encoded in the 3 unused function bits of devfn */
- #define EEH_TOKEN_DISABLED (1UL << 34UL) /* eeh is disabled for this token */
- #define IS_EEH_TOKEN_DISABLED(token) ((unsigned long)(token) & EEH_TOKEN_DISABLED)
- #define EEH_STATE_OVERRIDE 1 /* IOA does not require eeh traps */
- #define EEH_STATE_FAILURE 16 /* */
- /* This is for profiling only */
- extern unsigned long eeh_total_mmio_ffs;
- extern int eeh_implemented;
- void eeh_init(void);
- static inline int is_eeh_implemented(void) { return eeh_implemented; }
- int eeh_get_state(unsigned long ea);
- unsigned long eeh_check_failure(void *token, unsigned long val);
- #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);
- /* Generate an EEH token.
- * The high nibble of the offset is cleared, otherwise bounds checking is performed.
- * Use IO_TOKEN_TO_ADDR(token) to translate this token back to a mapped virtual addr.
- * Do NOT do this to perform IO -- use the read/write macros!
- */
- unsigned long eeh_token(unsigned long phb,
- unsigned long bus,
- unsigned long devfn,
- unsigned long offset);
- 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
- * all ones which is perhaps fastest as ~val. Finally we weed out
- * EEH disabled IO BARs.
- *
- * If this macro yields TRUE, the caller relays to eeh_check_failure()
- * which does further tests out of line.
- */
- /* #define EEH_POSSIBLE_ERROR(addr, vaddr, val) ((vaddr) != (addr) && ~(val) == 0 && !IS_EEH_TOKEN_DISABLED(addr)) */
- /* This version is rearranged to collect some profiling data */
- #define EEH_POSSIBLE_ERROR(addr, vaddr, val) (~(val) == 0 && (++eeh_total_mmio_ffs, (vaddr) != (addr) && !IS_EEH_TOKEN_DISABLED(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))
- 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))
- 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 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))
- 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 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);
- }
- static inline void eeh_insb(volatile u8 *addr, void *buf, int n) {
- volatile u8 *vaddr = (volatile u8 *)IO_TOKEN_TO_ADDR(addr);
- _insb(vaddr, buf, n);
- /* ToDo: look for ff's in buf[n] */
- }
- static inline void eeh_outsb(volatile u8 *addr, const void *buf, int n) {
- volatile u8 *vaddr = (volatile u8 *)IO_TOKEN_TO_ADDR(addr);
- _outsb(vaddr, buf, n);
- }
- static inline void eeh_insw_ns(volatile u16 *addr, void *buf, int n) {
- volatile u16 *vaddr = (volatile u16 *)IO_TOKEN_TO_ADDR(addr);
- _insw_ns(vaddr, buf, n);
- /* ToDo: look for ffff's in buf[n] */
- }
- static inline void eeh_outsw_ns(volatile u16 *addr, const void *buf, int n) {
- volatile u16 *vaddr = (volatile u16 *)IO_TOKEN_TO_ADDR(addr);
- _outsw_ns(vaddr, buf, n);
- }
- static inline void eeh_insl_ns(volatile u32 *addr, void *buf, int n) {
- volatile u32 *vaddr = (volatile u32 *)IO_TOKEN_TO_ADDR(addr);
- _insl_ns(vaddr, buf, n);
- /* ToDo: look for ffffffff's in buf[n] */
- }
- static inline void eeh_outsl_ns(volatile u32 *addr, const void *buf, int n) {
- volatile u32 *vaddr = (volatile u32 *)IO_TOKEN_TO_ADDR(addr);
- _outsl_ns(vaddr, buf, n);
- }
- #endif /* _EEH_H */