Commit | Line | Data |
---|---|---|
172ca926 | 1 | /* |
1da177e4 | 2 | * Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation. |
cb3bc9d0 | 3 | * Copyright 2001-2012 IBM Corporation. |
1da177e4 LT |
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 | ||
8b8da358 BH |
20 | #ifndef _POWERPC_EEH_H |
21 | #define _POWERPC_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 | ||
968f968f GS |
34 | /* |
35 | * The struct is used to trace PE related EEH functionality. | |
36 | * In theory, there will have one instance of the struct to | |
37 | * be created against particular PE. In nature, PEs corelate | |
38 | * to each other. the struct has to reflect that hierarchy in | |
39 | * order to easily pick up those affected PEs when one particular | |
40 | * PE has EEH errors. | |
41 | * | |
42 | * Also, one particular PE might be composed of PCI device, PCI | |
43 | * bus and its subordinate components. The struct also need ship | |
44 | * the information. Further more, one particular PE is only meaingful | |
45 | * in the corresponding PHB. Therefore, the root PEs should be created | |
46 | * against existing PHBs in on-to-one fashion. | |
47 | */ | |
5efc3ad7 GS |
48 | #define EEH_PE_INVALID (1 << 0) /* Invalid */ |
49 | #define EEH_PE_PHB (1 << 1) /* PHB PE */ | |
50 | #define EEH_PE_DEVICE (1 << 2) /* Device PE */ | |
51 | #define EEH_PE_BUS (1 << 3) /* Bus PE */ | |
968f968f GS |
52 | |
53 | #define EEH_PE_ISOLATED (1 << 0) /* Isolated PE */ | |
54 | #define EEH_PE_RECOVERING (1 << 1) /* Recovering PE */ | |
55 | ||
56 | struct eeh_pe { | |
57 | int type; /* PE type: PHB/Bus/Device */ | |
58 | int state; /* PE EEH dependent mode */ | |
59 | int config_addr; /* Traditional PCI address */ | |
60 | int addr; /* PE configuration address */ | |
61 | struct pci_controller *phb; /* Associated PHB */ | |
62 | int check_count; /* Times of ignored error */ | |
63 | int freeze_count; /* Times of froze up */ | |
64 | int false_positives; /* Times of reported #ff's */ | |
65 | struct eeh_pe *parent; /* Parent PE */ | |
66 | struct list_head child_list; /* Link PE to the child list */ | |
67 | struct list_head edevs; /* Link list of EEH devices */ | |
68 | struct list_head child; /* Child PEs */ | |
69 | }; | |
70 | ||
5b663529 GS |
71 | #define eeh_pe_for_each_dev(pe, edev) \ |
72 | list_for_each_entry(edev, &pe->edevs, list) | |
73 | ||
eb740b5f GS |
74 | /* |
75 | * The struct is used to trace EEH state for the associated | |
76 | * PCI device node or PCI device. In future, it might | |
77 | * represent PE as well so that the EEH device to form | |
78 | * another tree except the currently existing tree of PCI | |
79 | * buses and PCI devices | |
80 | */ | |
dbbceee1 | 81 | #define EEH_DEV_IRQ_DISABLED (1<<0) /* Interrupt disabled */ |
eb740b5f GS |
82 | |
83 | struct eeh_dev { | |
84 | int mode; /* EEH mode */ | |
85 | int class_code; /* Class code of the device */ | |
86 | int config_addr; /* Config address */ | |
87 | int pe_config_addr; /* PE config address */ | |
eb740b5f | 88 | u32 config_space[16]; /* Saved PCI config space */ |
968f968f GS |
89 | struct eeh_pe *pe; /* Associated PE */ |
90 | struct list_head list; /* Form link list in the PE */ | |
eb740b5f GS |
91 | struct pci_controller *phb; /* Associated PHB */ |
92 | struct device_node *dn; /* Associated device node */ | |
93 | struct pci_dev *pdev; /* Associated PCI device */ | |
94 | }; | |
95 | ||
96 | static inline struct device_node *eeh_dev_to_of_node(struct eeh_dev *edev) | |
97 | { | |
98 | return edev->dn; | |
99 | } | |
100 | ||
101 | static inline struct pci_dev *eeh_dev_to_pci_dev(struct eeh_dev *edev) | |
102 | { | |
103 | return edev->pdev; | |
104 | } | |
105 | ||
aa1e6374 GS |
106 | /* |
107 | * The struct is used to trace the registered EEH operation | |
108 | * callback functions. Actually, those operation callback | |
109 | * functions are heavily platform dependent. That means the | |
110 | * platform should register its own EEH operation callback | |
111 | * functions before any EEH further operations. | |
112 | */ | |
8fb8f709 GS |
113 | #define EEH_OPT_DISABLE 0 /* EEH disable */ |
114 | #define EEH_OPT_ENABLE 1 /* EEH enable */ | |
115 | #define EEH_OPT_THAW_MMIO 2 /* MMIO enable */ | |
116 | #define EEH_OPT_THAW_DMA 3 /* DMA enable */ | |
eb594a47 GS |
117 | #define EEH_STATE_UNAVAILABLE (1 << 0) /* State unavailable */ |
118 | #define EEH_STATE_NOT_SUPPORT (1 << 1) /* EEH not supported */ | |
119 | #define EEH_STATE_RESET_ACTIVE (1 << 2) /* Active reset */ | |
120 | #define EEH_STATE_MMIO_ACTIVE (1 << 3) /* Active MMIO */ | |
121 | #define EEH_STATE_DMA_ACTIVE (1 << 4) /* Active DMA */ | |
122 | #define EEH_STATE_MMIO_ENABLED (1 << 5) /* MMIO enabled */ | |
123 | #define EEH_STATE_DMA_ENABLED (1 << 6) /* DMA enabled */ | |
2652481f GS |
124 | #define EEH_RESET_DEACTIVATE 0 /* Deactivate the PE reset */ |
125 | #define EEH_RESET_HOT 1 /* Hot reset */ | |
126 | #define EEH_RESET_FUNDAMENTAL 3 /* Fundamental reset */ | |
8d633291 GS |
127 | #define EEH_LOG_TEMP 1 /* EEH temporary error log */ |
128 | #define EEH_LOG_PERM 2 /* EEH permanent error log */ | |
eb594a47 | 129 | |
aa1e6374 GS |
130 | struct eeh_ops { |
131 | char *name; | |
132 | int (*init)(void); | |
d7bb8862 GS |
133 | void* (*of_probe)(struct device_node *dn, void *flag); |
134 | void* (*dev_probe)(struct pci_dev *dev, void *flag); | |
371a395d GS |
135 | int (*set_option)(struct eeh_pe *pe, int option); |
136 | int (*get_pe_addr)(struct eeh_pe *pe); | |
137 | int (*get_state)(struct eeh_pe *pe, int *state); | |
138 | int (*reset)(struct eeh_pe *pe, int option); | |
139 | int (*wait_state)(struct eeh_pe *pe, int max_wait); | |
140 | int (*get_log)(struct eeh_pe *pe, int severity, char *drv_log, unsigned long len); | |
141 | int (*configure_bridge)(struct eeh_pe *pe); | |
3780444c GS |
142 | int (*read_config)(struct device_node *dn, int where, int size, u32 *val); |
143 | int (*write_config)(struct device_node *dn, int where, int size, u32 val); | |
aa1e6374 GS |
144 | }; |
145 | ||
146 | extern struct eeh_ops *eeh_ops; | |
1e28a7dd | 147 | extern int eeh_subsystem_enabled; |
646a8499 | 148 | extern struct mutex eeh_mutex; |
d7bb8862 GS |
149 | extern int eeh_probe_mode; |
150 | ||
151 | #define EEH_PROBE_MODE_DEV (1<<0) /* From PCI device */ | |
152 | #define EEH_PROBE_MODE_DEVTREE (1<<1) /* From device tree */ | |
153 | ||
154 | static inline void eeh_probe_mode_set(int flag) | |
155 | { | |
156 | eeh_probe_mode = flag; | |
157 | } | |
158 | ||
159 | static inline int eeh_probe_mode_devtree(void) | |
160 | { | |
161 | return (eeh_probe_mode == EEH_PROBE_MODE_DEVTREE); | |
162 | } | |
163 | ||
164 | static inline int eeh_probe_mode_dev(void) | |
165 | { | |
166 | return (eeh_probe_mode == EEH_PROBE_MODE_DEV); | |
167 | } | |
646a8499 GS |
168 | |
169 | static inline void eeh_lock(void) | |
170 | { | |
171 | mutex_lock(&eeh_mutex); | |
172 | } | |
173 | ||
174 | static inline void eeh_unlock(void) | |
175 | { | |
176 | mutex_unlock(&eeh_mutex); | |
177 | } | |
1e28a7dd | 178 | |
cb3bc9d0 GS |
179 | /* |
180 | * Max number of EEH freezes allowed before we consider the device | |
181 | * to be permanently disabled. | |
182 | */ | |
172ca926 LV |
183 | #define EEH_MAX_ALLOWED_FREEZES 5 |
184 | ||
22f4ab12 | 185 | typedef void *(*eeh_traverse_func)(void *data, void *flag); |
55037d17 | 186 | int __devinit eeh_phb_pe_create(struct pci_controller *phb); |
9b84348c | 187 | int eeh_add_to_parent_pe(struct eeh_dev *edev); |
20ee6a97 | 188 | int eeh_rmv_from_parent_pe(struct eeh_dev *edev, int purge_pe); |
9e6d2cf6 GS |
189 | void *eeh_pe_dev_traverse(struct eeh_pe *root, |
190 | eeh_traverse_func fn, void *flag); | |
191 | void eeh_pe_restore_bars(struct eeh_pe *pe); | |
9b3c76f0 | 192 | struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe); |
55037d17 | 193 | |
eb740b5f GS |
194 | void * __devinit eeh_dev_init(struct device_node *dn, void *data); |
195 | void __devinit eeh_dev_phb_init_dynamic(struct pci_controller *phb); | |
aa1e6374 GS |
196 | int __init eeh_ops_register(struct eeh_ops *ops); |
197 | int __exit eeh_ops_unregister(const char *name); | |
1da177e4 LT |
198 | unsigned long eeh_check_failure(const volatile void __iomem *token, |
199 | unsigned long val); | |
f8f7d63f | 200 | int eeh_dev_check_failure(struct eeh_dev *edev); |
3ab96a02 | 201 | void __init eeh_addr_cache_build(void); |
e2a296ee | 202 | void eeh_add_device_tree_early(struct device_node *); |
827c1a6c | 203 | void eeh_add_device_tree_late(struct pci_bus *); |
20ee6a97 | 204 | void eeh_remove_bus_device(struct pci_dev *, int); |
e2a296ee | 205 | |
1da177e4 LT |
206 | /** |
207 | * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. | |
208 | * | |
209 | * If this macro yields TRUE, the caller relays to eeh_check_failure() | |
210 | * which does further tests out of line. | |
211 | */ | |
1e28a7dd | 212 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_subsystem_enabled) |
1da177e4 LT |
213 | |
214 | /* | |
215 | * Reads from a device which has been isolated by EEH will return | |
216 | * all 1s. This macro gives an all-1s value of the given size (in | |
217 | * bytes: 1, 2, or 4) for comparing with the result of a read. | |
218 | */ | |
219 | #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8)) | |
220 | ||
221 | #else /* !CONFIG_EEH */ | |
eb740b5f GS |
222 | |
223 | static inline void *eeh_dev_init(struct device_node *dn, void *data) | |
224 | { | |
225 | return NULL; | |
226 | } | |
227 | ||
228 | static inline void eeh_dev_phb_init_dynamic(struct pci_controller *phb) { } | |
229 | ||
1da177e4 LT |
230 | static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val) |
231 | { | |
232 | return val; | |
233 | } | |
234 | ||
f8f7d63f | 235 | #define eeh_dev_check_failure(x) (0) |
1da177e4 | 236 | |
3ab96a02 | 237 | static inline void eeh_addr_cache_build(void) { } |
1da177e4 | 238 | |
022930eb HM |
239 | static inline void eeh_add_device_tree_early(struct device_node *dn) { } |
240 | ||
827c1a6c JR |
241 | static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } |
242 | ||
20ee6a97 | 243 | static inline void eeh_remove_bus_device(struct pci_dev *dev, int purge_pe) { } |
646a8499 GS |
244 | |
245 | static inline void eeh_lock(void) { } | |
246 | static inline void eeh_unlock(void) { } | |
247 | ||
1da177e4 LT |
248 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
249 | #define EEH_IO_ERROR_VALUE(size) (-1UL) | |
250 | #endif /* CONFIG_EEH */ | |
251 | ||
8b8da358 | 252 | #ifdef CONFIG_PPC64 |
172ca926 | 253 | /* |
1da177e4 LT |
254 | * MMIO read/write operations with EEH support. |
255 | */ | |
256 | static inline u8 eeh_readb(const volatile void __iomem *addr) | |
257 | { | |
258 | u8 val = in_8(addr); | |
259 | if (EEH_POSSIBLE_ERROR(val, u8)) | |
260 | return eeh_check_failure(addr, val); | |
261 | return val; | |
262 | } | |
1da177e4 LT |
263 | |
264 | static inline u16 eeh_readw(const volatile void __iomem *addr) | |
265 | { | |
266 | u16 val = in_le16(addr); | |
267 | if (EEH_POSSIBLE_ERROR(val, u16)) | |
268 | return eeh_check_failure(addr, val); | |
269 | return val; | |
270 | } | |
1da177e4 LT |
271 | |
272 | static inline u32 eeh_readl(const volatile void __iomem *addr) | |
273 | { | |
274 | u32 val = in_le32(addr); | |
275 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
276 | return eeh_check_failure(addr, val); | |
277 | return val; | |
278 | } | |
4cb3cee0 BH |
279 | |
280 | static inline u64 eeh_readq(const volatile void __iomem *addr) | |
1da177e4 | 281 | { |
4cb3cee0 BH |
282 | u64 val = in_le64(addr); |
283 | if (EEH_POSSIBLE_ERROR(val, u64)) | |
1da177e4 LT |
284 | return eeh_check_failure(addr, val); |
285 | return val; | |
286 | } | |
1da177e4 | 287 | |
4cb3cee0 | 288 | static inline u16 eeh_readw_be(const volatile void __iomem *addr) |
1da177e4 | 289 | { |
4cb3cee0 BH |
290 | u16 val = in_be16(addr); |
291 | if (EEH_POSSIBLE_ERROR(val, u16)) | |
1da177e4 LT |
292 | return eeh_check_failure(addr, val); |
293 | return val; | |
294 | } | |
4cb3cee0 BH |
295 | |
296 | static inline u32 eeh_readl_be(const volatile void __iomem *addr) | |
1da177e4 | 297 | { |
4cb3cee0 BH |
298 | u32 val = in_be32(addr); |
299 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
300 | return eeh_check_failure(addr, val); | |
301 | return val; | |
1da177e4 | 302 | } |
4cb3cee0 BH |
303 | |
304 | static inline u64 eeh_readq_be(const volatile void __iomem *addr) | |
1da177e4 LT |
305 | { |
306 | u64 val = in_be64(addr); | |
307 | if (EEH_POSSIBLE_ERROR(val, u64)) | |
308 | return eeh_check_failure(addr, val); | |
309 | return val; | |
310 | } | |
1da177e4 | 311 | |
68a64357 BH |
312 | static inline void eeh_memcpy_fromio(void *dest, const |
313 | volatile void __iomem *src, | |
1da177e4 LT |
314 | unsigned long n) |
315 | { | |
68a64357 | 316 | _memcpy_fromio(dest, src, n); |
1da177e4 LT |
317 | |
318 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes | |
319 | * were copied. Check all four bytes. | |
320 | */ | |
68a64357 BH |
321 | if (n >= 4 && EEH_POSSIBLE_ERROR(*((u32 *)(dest + n - 4)), u32)) |
322 | eeh_check_failure(src, *((u32 *)(dest + n - 4))); | |
1da177e4 LT |
323 | } |
324 | ||
1da177e4 | 325 | /* in-string eeh macros */ |
4cb3cee0 BH |
326 | static inline void eeh_readsb(const volatile void __iomem *addr, void * buf, |
327 | int ns) | |
1da177e4 | 328 | { |
4cb3cee0 | 329 | _insb(addr, buf, ns); |
1da177e4 | 330 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) |
4cb3cee0 | 331 | eeh_check_failure(addr, *(u8*)buf); |
1da177e4 LT |
332 | } |
333 | ||
4cb3cee0 BH |
334 | static inline void eeh_readsw(const volatile void __iomem *addr, void * buf, |
335 | int ns) | |
1da177e4 | 336 | { |
4cb3cee0 | 337 | _insw(addr, buf, ns); |
1da177e4 | 338 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) |
4cb3cee0 | 339 | eeh_check_failure(addr, *(u16*)buf); |
1da177e4 LT |
340 | } |
341 | ||
4cb3cee0 BH |
342 | static inline void eeh_readsl(const volatile void __iomem *addr, void * buf, |
343 | int nl) | |
1da177e4 | 344 | { |
4cb3cee0 | 345 | _insl(addr, buf, nl); |
1da177e4 | 346 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) |
4cb3cee0 | 347 | eeh_check_failure(addr, *(u32*)buf); |
1da177e4 LT |
348 | } |
349 | ||
8b8da358 | 350 | #endif /* CONFIG_PPC64 */ |
88ced031 | 351 | #endif /* __KERNEL__ */ |
8b8da358 | 352 | #endif /* _POWERPC_EEH_H */ |