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/init.h>
24 #include <linux/list.h>
25 #include <linux/string.h>
26 #include <linux/notifier.h>
31 /* Values for eeh_mode bits in device_node */
32 #define EEH_MODE_SUPPORTED (1<<0)
33 #define EEH_MODE_NOCHECK (1<<1)
34 #define EEH_MODE_ISOLATED (1<<2)
36 #ifdef CONFIG_PPC_PSERIES
37 extern void __init eeh_init(void);
38 unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val);
39 int eeh_dn_check_failure (struct device_node *dn, struct pci_dev *dev);
40 void __iomem *eeh_ioremap(unsigned long addr, void __iomem *vaddr);
41 void __init pci_addr_cache_build(void);
43 #define eeh_check_failure(token, val) (val)
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.
56 void eeh_add_device_early(struct device_node *);
57 void eeh_add_device_late(struct pci_dev *);
60 * eeh_remove_device - undo EEH setup for the indicated pci device
61 * @dev: pci device to be removed
63 * This routine should be when a device is removed from a running
64 * system (e.g. by hotplug or dlpar).
66 void eeh_remove_device(struct pci_dev *);
70 #define EEH_RELEASE_LOADSTORE 2
71 #define EEH_RELEASE_DMA 3
72 int eeh_set_option(struct pci_dev *dev, int options);
76 * Notifier event flags.
78 #define EEH_NOTIFY_FREEZE 1
80 /** EEH event -- structure holding pci slot data that describes
81 * a change in the isolation status of a PCI slot. A pointer
82 * to this struct is passed as the data pointer in a notify callback.
85 struct list_head list;
87 struct device_node *dn;
91 /** Register to find out about EEH events. */
92 int eeh_register_notifier(struct notifier_block *nb);
93 int eeh_unregister_notifier(struct notifier_block *nb);
96 * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure.
98 * If this macro yields TRUE, the caller relays to eeh_check_failure()
99 * which does further tests out of line.
101 #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0)
104 * Reads from a device which has been isolated by EEH will return
105 * all 1s. This macro gives an all-1s value of the given size (in
106 * bytes: 1, 2, or 4) for comparing with the result of a read.
108 #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8))
111 * MMIO read/write operations with EEH support.
113 static inline u8 eeh_readb(const volatile void __iomem *addr)
116 if (EEH_POSSIBLE_ERROR(val, u8))
117 return eeh_check_failure(addr, val);
120 static inline void eeh_writeb(u8 val, volatile void __iomem *addr)
125 static inline u16 eeh_readw(const volatile void __iomem *addr)
127 u16 val = in_le16(addr);
128 if (EEH_POSSIBLE_ERROR(val, u16))
129 return eeh_check_failure(addr, val);
132 static inline void eeh_writew(u16 val, volatile void __iomem *addr)
136 static inline u16 eeh_raw_readw(const volatile void __iomem *addr)
138 u16 val = in_be16(addr);
139 if (EEH_POSSIBLE_ERROR(val, u16))
140 return eeh_check_failure(addr, val);
143 static inline void eeh_raw_writew(u16 val, volatile void __iomem *addr) {
144 volatile u16 __iomem *vaddr = (volatile u16 __iomem *) addr;
145 out_be16(vaddr, val);
148 static inline u32 eeh_readl(const volatile void __iomem *addr)
150 u32 val = in_le32(addr);
151 if (EEH_POSSIBLE_ERROR(val, u32))
152 return eeh_check_failure(addr, val);
155 static inline void eeh_writel(u32 val, volatile void __iomem *addr)
159 static inline u32 eeh_raw_readl(const volatile void __iomem *addr)
161 u32 val = in_be32(addr);
162 if (EEH_POSSIBLE_ERROR(val, u32))
163 return eeh_check_failure(addr, val);
166 static inline void eeh_raw_writel(u32 val, volatile void __iomem *addr)
171 static inline u64 eeh_readq(const volatile void __iomem *addr)
173 u64 val = in_le64(addr);
174 if (EEH_POSSIBLE_ERROR(val, u64))
175 return eeh_check_failure(addr, val);
178 static inline void eeh_writeq(u64 val, volatile void __iomem *addr)
182 static inline u64 eeh_raw_readq(const volatile void __iomem *addr)
184 u64 val = in_be64(addr);
185 if (EEH_POSSIBLE_ERROR(val, u64))
186 return eeh_check_failure(addr, val);
189 static inline void eeh_raw_writeq(u64 val, volatile void __iomem *addr)
194 #define EEH_CHECK_ALIGN(v,a) \
195 ((((unsigned long)(v)) & ((a) - 1)) == 0)
197 static inline void eeh_memset_io(volatile void __iomem *addr, int c, unsigned long n)
203 while(n && !EEH_CHECK_ALIGN(addr, 4)) {
204 *((volatile u8 *)addr) = c;
205 addr = (void *)((unsigned long)addr + 1);
209 *((volatile u32 *)addr) = lc;
210 addr = (void *)((unsigned long)addr + 4);
214 *((volatile u8 *)addr) = c;
215 addr = (void *)((unsigned long)addr + 1);
218 __asm__ __volatile__ ("sync" : : : "memory");
220 static inline void eeh_memcpy_fromio(void *dest, const volatile void __iomem *src,
223 void *vsrc = (void __force *) src;
224 void *destsave = dest;
225 unsigned long nsave = n;
227 while(n && (!EEH_CHECK_ALIGN(vsrc, 4) || !EEH_CHECK_ALIGN(dest, 4))) {
228 *((u8 *)dest) = *((volatile u8 *)vsrc);
229 __asm__ __volatile__ ("eieio" : : : "memory");
230 vsrc = (void *)((unsigned long)vsrc + 1);
231 dest = (void *)((unsigned long)dest + 1);
235 *((u32 *)dest) = *((volatile u32 *)vsrc);
236 __asm__ __volatile__ ("eieio" : : : "memory");
237 vsrc = (void *)((unsigned long)vsrc + 4);
238 dest = (void *)((unsigned long)dest + 4);
242 *((u8 *)dest) = *((volatile u8 *)vsrc);
243 __asm__ __volatile__ ("eieio" : : : "memory");
244 vsrc = (void *)((unsigned long)vsrc + 1);
245 dest = (void *)((unsigned long)dest + 1);
248 __asm__ __volatile__ ("sync" : : : "memory");
250 /* Look for ffff's here at dest[n]. Assume that at least 4 bytes
251 * were copied. Check all four bytes.
254 (EEH_POSSIBLE_ERROR((*((u32 *) destsave+nsave-4)), u32))) {
255 eeh_check_failure(src, (*((u32 *) destsave+nsave-4)));
259 static inline void eeh_memcpy_toio(volatile void __iomem *dest, const void *src,
262 void *vdest = (void __force *) dest;
264 while(n && (!EEH_CHECK_ALIGN(vdest, 4) || !EEH_CHECK_ALIGN(src, 4))) {
265 *((volatile u8 *)vdest) = *((u8 *)src);
266 src = (void *)((unsigned long)src + 1);
267 vdest = (void *)((unsigned long)vdest + 1);
271 *((volatile u32 *)vdest) = *((volatile u32 *)src);
272 src = (void *)((unsigned long)src + 4);
273 vdest = (void *)((unsigned long)vdest + 4);
277 *((volatile u8 *)vdest) = *((u8 *)src);
278 src = (void *)((unsigned long)src + 1);
279 vdest = (void *)((unsigned long)vdest + 1);
282 __asm__ __volatile__ ("sync" : : : "memory");
285 #undef EEH_CHECK_ALIGN
287 static inline u8 eeh_inb(unsigned long port)
290 if (!_IO_IS_VALID(port))
292 val = in_8((u8 __iomem *)(port+pci_io_base));
293 if (EEH_POSSIBLE_ERROR(val, u8))
294 return eeh_check_failure((void __iomem *)(port), val);
298 static inline void eeh_outb(u8 val, unsigned long port)
300 if (_IO_IS_VALID(port))
301 out_8((u8 __iomem *)(port+pci_io_base), val);
304 static inline u16 eeh_inw(unsigned long port)
307 if (!_IO_IS_VALID(port))
309 val = in_le16((u16 __iomem *)(port+pci_io_base));
310 if (EEH_POSSIBLE_ERROR(val, u16))
311 return eeh_check_failure((void __iomem *)(port), val);
315 static inline void eeh_outw(u16 val, unsigned long port)
317 if (_IO_IS_VALID(port))
318 out_le16((u16 __iomem *)(port+pci_io_base), val);
321 static inline u32 eeh_inl(unsigned long port)
324 if (!_IO_IS_VALID(port))
326 val = in_le32((u32 __iomem *)(port+pci_io_base));
327 if (EEH_POSSIBLE_ERROR(val, u32))
328 return eeh_check_failure((void __iomem *)(port), val);
332 static inline void eeh_outl(u32 val, unsigned long port)
334 if (_IO_IS_VALID(port))
335 out_le32((u32 __iomem *)(port+pci_io_base), val);
338 /* in-string eeh macros */
339 static inline void eeh_insb(unsigned long port, void * buf, int ns)
341 _insb((u8 __iomem *)(port+pci_io_base), buf, ns);
342 if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8))
343 eeh_check_failure((void __iomem *)(port), *(u8*)buf);
346 static inline void eeh_insw_ns(unsigned long port, void * buf, int ns)
348 _insw_ns((u16 __iomem *)(port+pci_io_base), buf, ns);
349 if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16))
350 eeh_check_failure((void __iomem *)(port), *(u16*)buf);
353 static inline void eeh_insl_ns(unsigned long port, void * buf, int nl)
355 _insl_ns((u32 __iomem *)(port+pci_io_base), buf, nl);
356 if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32))
357 eeh_check_failure((void __iomem *)(port), *(u32*)buf);
360 #endif /* _PPC64_EEH_H */