3 * Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/config.h>
24 #include <linux/init.h>
25 #include <linux/list.h>
26 #include <linux/string.h>
31 struct notifier_block;
35 /* Values for eeh_mode bits in device_node */
36 #define EEH_MODE_SUPPORTED (1<<0)
37 #define EEH_MODE_NOCHECK (1<<1)
38 #define EEH_MODE_ISOLATED (1<<2)
40 void __init eeh_init(void);
41 unsigned long eeh_check_failure(const volatile void __iomem *token,
43 int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev);
44 void __init pci_addr_cache_build(void);
47 * eeh_add_device_early
50 * Perform eeh initialization for devices added after boot.
51 * Call eeh_add_device_early before doing any i/o to the
52 * device (including config space i/o). Call eeh_add_device_late
53 * to finish the eeh setup for this device.
55 void eeh_add_device_early(struct device_node *);
56 void eeh_add_device_late(struct pci_dev *);
59 * eeh_remove_device - undo EEH setup for the indicated pci device
60 * @dev: pci device to be removed
62 * This routine should be when a device is removed from a running
63 * system (e.g. by hotplug or dlpar).
65 void eeh_remove_device(struct pci_dev *);
69 #define EEH_RELEASE_LOADSTORE 2
70 #define EEH_RELEASE_DMA 3
73 * Notifier event flags.
75 #define EEH_NOTIFY_FREEZE 1
77 /** EEH event -- structure holding pci slot data that describes
78 * a change in the isolation status of a PCI slot. A pointer
79 * to this struct is passed as the data pointer in a notify callback.
82 struct list_head list;
84 struct device_node *dn;
88 /** Register to find out about EEH events. */
89 int eeh_register_notifier(struct notifier_block *nb);
90 int eeh_unregister_notifier(struct notifier_block *nb);
93 * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure.
95 * If this macro yields TRUE, the caller relays to eeh_check_failure()
96 * which does further tests out of line.
98 #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0)
101 * Reads from a device which has been isolated by EEH will return
102 * all 1s. This macro gives an all-1s value of the given size (in
103 * bytes: 1, 2, or 4) for comparing with the result of a read.
105 #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8))
109 #define eeh_check_failure(token, val) (val)
110 #define eeh_dn_check_failure(dn, dev) (0)
111 #define pci_addr_cache_build()
112 #define eeh_add_device_early(dn)
113 #define eeh_add_device_late(dev)
114 #define eeh_remove_device(dev)
115 #define EEH_POSSIBLE_ERROR(val, type) (0)
116 #define EEH_IO_ERROR_VALUE(size) (-1UL)
120 * MMIO read/write operations with EEH support.
122 static inline u8 eeh_readb(const volatile void __iomem *addr)
125 if (EEH_POSSIBLE_ERROR(val, u8))
126 return eeh_check_failure(addr, val);
129 static inline void eeh_writeb(u8 val, volatile void __iomem *addr)
134 static inline u16 eeh_readw(const volatile void __iomem *addr)
136 u16 val = in_le16(addr);
137 if (EEH_POSSIBLE_ERROR(val, u16))
138 return eeh_check_failure(addr, val);
141 static inline void eeh_writew(u16 val, volatile void __iomem *addr)
145 static inline u16 eeh_raw_readw(const volatile void __iomem *addr)
147 u16 val = in_be16(addr);
148 if (EEH_POSSIBLE_ERROR(val, u16))
149 return eeh_check_failure(addr, val);
152 static inline void eeh_raw_writew(u16 val, volatile void __iomem *addr) {
153 volatile u16 __iomem *vaddr = (volatile u16 __iomem *) addr;
154 out_be16(vaddr, val);
157 static inline u32 eeh_readl(const volatile void __iomem *addr)
159 u32 val = in_le32(addr);
160 if (EEH_POSSIBLE_ERROR(val, u32))
161 return eeh_check_failure(addr, val);
164 static inline void eeh_writel(u32 val, volatile void __iomem *addr)
168 static inline u32 eeh_raw_readl(const volatile void __iomem *addr)
170 u32 val = in_be32(addr);
171 if (EEH_POSSIBLE_ERROR(val, u32))
172 return eeh_check_failure(addr, val);
175 static inline void eeh_raw_writel(u32 val, volatile void __iomem *addr)
180 static inline u64 eeh_readq(const volatile void __iomem *addr)
182 u64 val = in_le64(addr);
183 if (EEH_POSSIBLE_ERROR(val, u64))
184 return eeh_check_failure(addr, val);
187 static inline void eeh_writeq(u64 val, volatile void __iomem *addr)
191 static inline u64 eeh_raw_readq(const volatile void __iomem *addr)
193 u64 val = in_be64(addr);
194 if (EEH_POSSIBLE_ERROR(val, u64))
195 return eeh_check_failure(addr, val);
198 static inline void eeh_raw_writeq(u64 val, volatile void __iomem *addr)
203 #define EEH_CHECK_ALIGN(v,a) \
204 ((((unsigned long)(v)) & ((a) - 1)) == 0)
206 static inline void eeh_memset_io(volatile void __iomem *addr, int c,
213 while(n && !EEH_CHECK_ALIGN(addr, 4)) {
214 *((volatile u8 *)addr) = c;
215 addr = (void *)((unsigned long)addr + 1);
219 *((volatile u32 *)addr) = lc;
220 addr = (void *)((unsigned long)addr + 4);
224 *((volatile u8 *)addr) = c;
225 addr = (void *)((unsigned long)addr + 1);
228 __asm__ __volatile__ ("sync" : : : "memory");
230 static inline void eeh_memcpy_fromio(void *dest, const volatile void __iomem *src,
233 void *vsrc = (void __force *) src;
234 void *destsave = dest;
235 unsigned long nsave = n;
237 while(n && (!EEH_CHECK_ALIGN(vsrc, 4) || !EEH_CHECK_ALIGN(dest, 4))) {
238 *((u8 *)dest) = *((volatile u8 *)vsrc);
239 __asm__ __volatile__ ("eieio" : : : "memory");
240 vsrc = (void *)((unsigned long)vsrc + 1);
241 dest = (void *)((unsigned long)dest + 1);
245 *((u32 *)dest) = *((volatile u32 *)vsrc);
246 __asm__ __volatile__ ("eieio" : : : "memory");
247 vsrc = (void *)((unsigned long)vsrc + 4);
248 dest = (void *)((unsigned long)dest + 4);
252 *((u8 *)dest) = *((volatile u8 *)vsrc);
253 __asm__ __volatile__ ("eieio" : : : "memory");
254 vsrc = (void *)((unsigned long)vsrc + 1);
255 dest = (void *)((unsigned long)dest + 1);
258 __asm__ __volatile__ ("sync" : : : "memory");
260 /* Look for ffff's here at dest[n]. Assume that at least 4 bytes
261 * were copied. Check all four bytes.
264 (EEH_POSSIBLE_ERROR((*((u32 *) destsave+nsave-4)), u32))) {
265 eeh_check_failure(src, (*((u32 *) destsave+nsave-4)));
269 static inline void eeh_memcpy_toio(volatile void __iomem *dest, const void *src,
272 void *vdest = (void __force *) dest;
274 while(n && (!EEH_CHECK_ALIGN(vdest, 4) || !EEH_CHECK_ALIGN(src, 4))) {
275 *((volatile u8 *)vdest) = *((u8 *)src);
276 src = (void *)((unsigned long)src + 1);
277 vdest = (void *)((unsigned long)vdest + 1);
281 *((volatile u32 *)vdest) = *((volatile u32 *)src);
282 src = (void *)((unsigned long)src + 4);
283 vdest = (void *)((unsigned long)vdest + 4);
287 *((volatile u8 *)vdest) = *((u8 *)src);
288 src = (void *)((unsigned long)src + 1);
289 vdest = (void *)((unsigned long)vdest + 1);
292 __asm__ __volatile__ ("sync" : : : "memory");
295 #undef EEH_CHECK_ALIGN
297 static inline u8 eeh_inb(unsigned long port)
300 if (!_IO_IS_VALID(port))
302 val = in_8((u8 __iomem *)(port+pci_io_base));
303 if (EEH_POSSIBLE_ERROR(val, u8))
304 return eeh_check_failure((void __iomem *)(port), val);
308 static inline void eeh_outb(u8 val, unsigned long port)
310 if (_IO_IS_VALID(port))
311 out_8((u8 __iomem *)(port+pci_io_base), val);
314 static inline u16 eeh_inw(unsigned long port)
317 if (!_IO_IS_VALID(port))
319 val = in_le16((u16 __iomem *)(port+pci_io_base));
320 if (EEH_POSSIBLE_ERROR(val, u16))
321 return eeh_check_failure((void __iomem *)(port), val);
325 static inline void eeh_outw(u16 val, unsigned long port)
327 if (_IO_IS_VALID(port))
328 out_le16((u16 __iomem *)(port+pci_io_base), val);
331 static inline u32 eeh_inl(unsigned long port)
334 if (!_IO_IS_VALID(port))
336 val = in_le32((u32 __iomem *)(port+pci_io_base));
337 if (EEH_POSSIBLE_ERROR(val, u32))
338 return eeh_check_failure((void __iomem *)(port), val);
342 static inline void eeh_outl(u32 val, unsigned long port)
344 if (_IO_IS_VALID(port))
345 out_le32((u32 __iomem *)(port+pci_io_base), val);
348 /* in-string eeh macros */
349 static inline void eeh_insb(unsigned long port, void * buf, int ns)
351 _insb((u8 __iomem *)(port+pci_io_base), buf, ns);
352 if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8))
353 eeh_check_failure((void __iomem *)(port), *(u8*)buf);
356 static inline void eeh_insw_ns(unsigned long port, void * buf, int ns)
358 _insw_ns((u16 __iomem *)(port+pci_io_base), buf, ns);
359 if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16))
360 eeh_check_failure((void __iomem *)(port), *(u16*)buf);
363 static inline void eeh_insl_ns(unsigned long port, void * buf, int nl)
365 _insl_ns((u32 __iomem *)(port+pci_io_base), buf, nl);
366 if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32))
367 eeh_check_failure((void __iomem *)(port), *(u32*)buf);
370 #endif /* _PPC64_EEH_H */