Commit | Line | Data |
---|---|---|
172ca926 | 1 | /* |
1da177e4 LT |
2 | * eeh.h |
3 | * Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation. | |
4 | * | |
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. | |
172ca926 | 9 | * |
1da177e4 LT |
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. | |
172ca926 | 14 | * |
1da177e4 LT |
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 | |
18 | */ | |
19 | ||
20 | #ifndef _PPC64_EEH_H | |
21 | #define _PPC64_EEH_H | |
88ced031 | 22 | #ifdef __KERNEL__ |
1da177e4 | 23 | |
1da177e4 LT |
24 | #include <linux/init.h> |
25 | #include <linux/list.h> | |
26 | #include <linux/string.h> | |
27 | ||
28 | struct pci_dev; | |
827c1a6c | 29 | struct pci_bus; |
1da177e4 | 30 | struct device_node; |
1da177e4 LT |
31 | |
32 | #ifdef CONFIG_EEH | |
33 | ||
1e28a7dd DW |
34 | extern int eeh_subsystem_enabled; |
35 | ||
1da177e4 | 36 | /* Values for eeh_mode bits in device_node */ |
77bd7415 LV |
37 | #define EEH_MODE_SUPPORTED (1<<0) |
38 | #define EEH_MODE_NOCHECK (1<<1) | |
39 | #define EEH_MODE_ISOLATED (1<<2) | |
40 | #define EEH_MODE_RECOVERING (1<<3) | |
41 | #define EEH_MODE_IRQ_DISABLED (1<<4) | |
1da177e4 | 42 | |
172ca926 LV |
43 | /* Max number of EEH freezes allowed before we consider the device |
44 | * to be permanently disabled. */ | |
45 | #define EEH_MAX_ALLOWED_FREEZES 5 | |
46 | ||
1da177e4 LT |
47 | void __init eeh_init(void); |
48 | unsigned long eeh_check_failure(const volatile void __iomem *token, | |
49 | unsigned long val); | |
50 | int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev); | |
51 | void __init pci_addr_cache_build(void); | |
52 | ||
53 | /** | |
54 | * eeh_add_device_early | |
55 | * eeh_add_device_late | |
56 | * | |
57 | * Perform eeh initialization for devices added after boot. | |
58 | * Call eeh_add_device_early before doing any i/o to the | |
59 | * device (including config space i/o). Call eeh_add_device_late | |
60 | * to finish the eeh setup for this device. | |
61 | */ | |
e2a296ee | 62 | void eeh_add_device_tree_early(struct device_node *); |
827c1a6c | 63 | void eeh_add_device_tree_late(struct pci_bus *); |
1da177e4 | 64 | |
e2a296ee LV |
65 | /** |
66 | * eeh_remove_device_recursive - undo EEH for device & children. | |
67 | * @dev: pci device to be removed | |
68 | * | |
69 | * As above, this removes the device; it also removes child | |
70 | * pci devices as well. | |
71 | */ | |
72 | void eeh_remove_bus_device(struct pci_dev *); | |
73 | ||
1da177e4 LT |
74 | /** |
75 | * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. | |
76 | * | |
77 | * If this macro yields TRUE, the caller relays to eeh_check_failure() | |
78 | * which does further tests out of line. | |
79 | */ | |
1e28a7dd | 80 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_subsystem_enabled) |
1da177e4 LT |
81 | |
82 | /* | |
83 | * Reads from a device which has been isolated by EEH will return | |
84 | * all 1s. This macro gives an all-1s value of the given size (in | |
85 | * bytes: 1, 2, or 4) for comparing with the result of a read. | |
86 | */ | |
87 | #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8)) | |
88 | ||
89 | #else /* !CONFIG_EEH */ | |
90 | static inline void eeh_init(void) { } | |
91 | ||
92 | static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val) | |
93 | { | |
94 | return val; | |
95 | } | |
96 | ||
97 | static inline int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) | |
98 | { | |
99 | return 0; | |
100 | } | |
101 | ||
102 | static inline void pci_addr_cache_build(void) { } | |
103 | ||
022930eb HM |
104 | static inline void eeh_add_device_tree_early(struct device_node *dn) { } |
105 | ||
827c1a6c JR |
106 | static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } |
107 | ||
022930eb | 108 | static inline void eeh_remove_bus_device(struct pci_dev *dev) { } |
1da177e4 LT |
109 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
110 | #define EEH_IO_ERROR_VALUE(size) (-1UL) | |
111 | #endif /* CONFIG_EEH */ | |
112 | ||
172ca926 | 113 | /* |
1da177e4 LT |
114 | * MMIO read/write operations with EEH support. |
115 | */ | |
116 | static inline u8 eeh_readb(const volatile void __iomem *addr) | |
117 | { | |
118 | u8 val = in_8(addr); | |
119 | if (EEH_POSSIBLE_ERROR(val, u8)) | |
120 | return eeh_check_failure(addr, val); | |
121 | return val; | |
122 | } | |
123 | static inline void eeh_writeb(u8 val, volatile void __iomem *addr) | |
124 | { | |
125 | out_8(addr, val); | |
126 | } | |
127 | ||
128 | static inline u16 eeh_readw(const volatile void __iomem *addr) | |
129 | { | |
130 | u16 val = in_le16(addr); | |
131 | if (EEH_POSSIBLE_ERROR(val, u16)) | |
132 | return eeh_check_failure(addr, val); | |
133 | return val; | |
134 | } | |
135 | static inline void eeh_writew(u16 val, volatile void __iomem *addr) | |
136 | { | |
137 | out_le16(addr, val); | |
138 | } | |
139 | static inline u16 eeh_raw_readw(const volatile void __iomem *addr) | |
140 | { | |
141 | u16 val = in_be16(addr); | |
142 | if (EEH_POSSIBLE_ERROR(val, u16)) | |
143 | return eeh_check_failure(addr, val); | |
144 | return val; | |
145 | } | |
146 | static inline void eeh_raw_writew(u16 val, volatile void __iomem *addr) { | |
147 | volatile u16 __iomem *vaddr = (volatile u16 __iomem *) addr; | |
148 | out_be16(vaddr, val); | |
149 | } | |
150 | ||
151 | static inline u32 eeh_readl(const volatile void __iomem *addr) | |
152 | { | |
153 | u32 val = in_le32(addr); | |
154 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
155 | return eeh_check_failure(addr, val); | |
156 | return val; | |
157 | } | |
158 | static inline void eeh_writel(u32 val, volatile void __iomem *addr) | |
159 | { | |
160 | out_le32(addr, val); | |
161 | } | |
162 | static inline u32 eeh_raw_readl(const volatile void __iomem *addr) | |
163 | { | |
164 | u32 val = in_be32(addr); | |
165 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
166 | return eeh_check_failure(addr, val); | |
167 | return val; | |
168 | } | |
169 | static inline void eeh_raw_writel(u32 val, volatile void __iomem *addr) | |
170 | { | |
171 | out_be32(addr, val); | |
172 | } | |
173 | ||
174 | static inline u64 eeh_readq(const volatile void __iomem *addr) | |
175 | { | |
176 | u64 val = in_le64(addr); | |
177 | if (EEH_POSSIBLE_ERROR(val, u64)) | |
178 | return eeh_check_failure(addr, val); | |
179 | return val; | |
180 | } | |
181 | static inline void eeh_writeq(u64 val, volatile void __iomem *addr) | |
182 | { | |
183 | out_le64(addr, val); | |
184 | } | |
185 | static inline u64 eeh_raw_readq(const volatile void __iomem *addr) | |
186 | { | |
187 | u64 val = in_be64(addr); | |
188 | if (EEH_POSSIBLE_ERROR(val, u64)) | |
189 | return eeh_check_failure(addr, val); | |
190 | return val; | |
191 | } | |
192 | static inline void eeh_raw_writeq(u64 val, volatile void __iomem *addr) | |
193 | { | |
194 | out_be64(addr, val); | |
195 | } | |
196 | ||
197 | #define EEH_CHECK_ALIGN(v,a) \ | |
198 | ((((unsigned long)(v)) & ((a) - 1)) == 0) | |
199 | ||
200 | static inline void eeh_memset_io(volatile void __iomem *addr, int c, | |
201 | unsigned long n) | |
202 | { | |
6c9afc65 | 203 | void *p = (void __force *)addr; |
1da177e4 LT |
204 | u32 lc = c; |
205 | lc |= lc << 8; | |
206 | lc |= lc << 16; | |
207 | ||
6c9afc65 Z |
208 | while(n && !EEH_CHECK_ALIGN(p, 4)) { |
209 | *((volatile u8 *)p) = c; | |
210 | p++; | |
1da177e4 LT |
211 | n--; |
212 | } | |
213 | while(n >= 4) { | |
6c9afc65 Z |
214 | *((volatile u32 *)p) = lc; |
215 | p += 4; | |
1da177e4 LT |
216 | n -= 4; |
217 | } | |
218 | while(n) { | |
6c9afc65 Z |
219 | *((volatile u8 *)p) = c; |
220 | p++; | |
1da177e4 LT |
221 | n--; |
222 | } | |
223 | __asm__ __volatile__ ("sync" : : : "memory"); | |
224 | } | |
225 | static inline void eeh_memcpy_fromio(void *dest, const volatile void __iomem *src, | |
226 | unsigned long n) | |
227 | { | |
228 | void *vsrc = (void __force *) src; | |
229 | void *destsave = dest; | |
230 | unsigned long nsave = n; | |
231 | ||
232 | while(n && (!EEH_CHECK_ALIGN(vsrc, 4) || !EEH_CHECK_ALIGN(dest, 4))) { | |
233 | *((u8 *)dest) = *((volatile u8 *)vsrc); | |
234 | __asm__ __volatile__ ("eieio" : : : "memory"); | |
6c9afc65 Z |
235 | vsrc++; |
236 | dest++; | |
1da177e4 LT |
237 | n--; |
238 | } | |
239 | while(n > 4) { | |
240 | *((u32 *)dest) = *((volatile u32 *)vsrc); | |
241 | __asm__ __volatile__ ("eieio" : : : "memory"); | |
6c9afc65 Z |
242 | vsrc += 4; |
243 | dest += 4; | |
1da177e4 LT |
244 | n -= 4; |
245 | } | |
246 | while(n) { | |
247 | *((u8 *)dest) = *((volatile u8 *)vsrc); | |
248 | __asm__ __volatile__ ("eieio" : : : "memory"); | |
6c9afc65 Z |
249 | vsrc++; |
250 | dest++; | |
1da177e4 LT |
251 | n--; |
252 | } | |
253 | __asm__ __volatile__ ("sync" : : : "memory"); | |
254 | ||
255 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes | |
256 | * were copied. Check all four bytes. | |
257 | */ | |
258 | if ((nsave >= 4) && | |
259 | (EEH_POSSIBLE_ERROR((*((u32 *) destsave+nsave-4)), u32))) { | |
260 | eeh_check_failure(src, (*((u32 *) destsave+nsave-4))); | |
261 | } | |
262 | } | |
263 | ||
264 | static inline void eeh_memcpy_toio(volatile void __iomem *dest, const void *src, | |
265 | unsigned long n) | |
266 | { | |
267 | void *vdest = (void __force *) dest; | |
268 | ||
269 | while(n && (!EEH_CHECK_ALIGN(vdest, 4) || !EEH_CHECK_ALIGN(src, 4))) { | |
270 | *((volatile u8 *)vdest) = *((u8 *)src); | |
6c9afc65 Z |
271 | src++; |
272 | vdest++; | |
1da177e4 LT |
273 | n--; |
274 | } | |
275 | while(n > 4) { | |
276 | *((volatile u32 *)vdest) = *((volatile u32 *)src); | |
6c9afc65 Z |
277 | src += 4; |
278 | vdest += 4; | |
1da177e4 LT |
279 | n-=4; |
280 | } | |
281 | while(n) { | |
282 | *((volatile u8 *)vdest) = *((u8 *)src); | |
6c9afc65 Z |
283 | src++; |
284 | vdest++; | |
1da177e4 LT |
285 | n--; |
286 | } | |
287 | __asm__ __volatile__ ("sync" : : : "memory"); | |
288 | } | |
289 | ||
290 | #undef EEH_CHECK_ALIGN | |
291 | ||
292 | static inline u8 eeh_inb(unsigned long port) | |
293 | { | |
294 | u8 val; | |
1da177e4 LT |
295 | val = in_8((u8 __iomem *)(port+pci_io_base)); |
296 | if (EEH_POSSIBLE_ERROR(val, u8)) | |
297 | return eeh_check_failure((void __iomem *)(port), val); | |
298 | return val; | |
299 | } | |
300 | ||
301 | static inline void eeh_outb(u8 val, unsigned long port) | |
302 | { | |
c256f4b9 | 303 | out_8((u8 __iomem *)(port+pci_io_base), val); |
1da177e4 LT |
304 | } |
305 | ||
306 | static inline u16 eeh_inw(unsigned long port) | |
307 | { | |
308 | u16 val; | |
1da177e4 LT |
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); | |
312 | return val; | |
313 | } | |
314 | ||
315 | static inline void eeh_outw(u16 val, unsigned long port) | |
316 | { | |
c256f4b9 | 317 | out_le16((u16 __iomem *)(port+pci_io_base), val); |
1da177e4 LT |
318 | } |
319 | ||
320 | static inline u32 eeh_inl(unsigned long port) | |
321 | { | |
322 | u32 val; | |
1da177e4 LT |
323 | val = in_le32((u32 __iomem *)(port+pci_io_base)); |
324 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
325 | return eeh_check_failure((void __iomem *)(port), val); | |
326 | return val; | |
327 | } | |
328 | ||
329 | static inline void eeh_outl(u32 val, unsigned long port) | |
330 | { | |
c256f4b9 | 331 | out_le32((u32 __iomem *)(port+pci_io_base), val); |
1da177e4 LT |
332 | } |
333 | ||
334 | /* in-string eeh macros */ | |
335 | static inline void eeh_insb(unsigned long port, void * buf, int ns) | |
336 | { | |
337 | _insb((u8 __iomem *)(port+pci_io_base), buf, ns); | |
338 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) | |
339 | eeh_check_failure((void __iomem *)(port), *(u8*)buf); | |
340 | } | |
341 | ||
342 | static inline void eeh_insw_ns(unsigned long port, void * buf, int ns) | |
343 | { | |
344 | _insw_ns((u16 __iomem *)(port+pci_io_base), buf, ns); | |
345 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) | |
346 | eeh_check_failure((void __iomem *)(port), *(u16*)buf); | |
347 | } | |
348 | ||
349 | static inline void eeh_insl_ns(unsigned long port, void * buf, int nl) | |
350 | { | |
351 | _insl_ns((u32 __iomem *)(port+pci_io_base), buf, nl); | |
352 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) | |
353 | eeh_check_failure((void __iomem *)(port), *(u32*)buf); | |
354 | } | |
355 | ||
88ced031 | 356 | #endif /* __KERNEL__ */ |
1da177e4 | 357 | #endif /* _PPC64_EEH_H */ |