--- /dev/null
+/*
+ * 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 */
git://git.onelab.eu / linux-2.6.git / blobdiff