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> | |
5a71978e | 27 | #include <linux/time.h> |
1da177e4 LT |
28 | |
29 | struct pci_dev; | |
827c1a6c | 30 | struct pci_bus; |
1da177e4 | 31 | struct device_node; |
1da177e4 LT |
32 | |
33 | #ifdef CONFIG_EEH | |
34 | ||
968f968f GS |
35 | /* |
36 | * The struct is used to trace PE related EEH functionality. | |
37 | * In theory, there will have one instance of the struct to | |
38 | * be created against particular PE. In nature, PEs corelate | |
39 | * to each other. the struct has to reflect that hierarchy in | |
40 | * order to easily pick up those affected PEs when one particular | |
41 | * PE has EEH errors. | |
42 | * | |
43 | * Also, one particular PE might be composed of PCI device, PCI | |
44 | * bus and its subordinate components. The struct also need ship | |
45 | * the information. Further more, one particular PE is only meaingful | |
46 | * in the corresponding PHB. Therefore, the root PEs should be created | |
47 | * against existing PHBs in on-to-one fashion. | |
48 | */ | |
5efc3ad7 GS |
49 | #define EEH_PE_INVALID (1 << 0) /* Invalid */ |
50 | #define EEH_PE_PHB (1 << 1) /* PHB PE */ | |
51 | #define EEH_PE_DEVICE (1 << 2) /* Device PE */ | |
52 | #define EEH_PE_BUS (1 << 3) /* Bus PE */ | |
968f968f GS |
53 | |
54 | #define EEH_PE_ISOLATED (1 << 0) /* Isolated PE */ | |
55 | #define EEH_PE_RECOVERING (1 << 1) /* Recovering PE */ | |
8a6b1bc7 | 56 | #define EEH_PE_PHB_DEAD (1 << 2) /* Dead PHB */ |
968f968f | 57 | |
807a827d GS |
58 | #define EEH_PE_KEEP (1 << 8) /* Keep PE on hotplug */ |
59 | ||
968f968f GS |
60 | struct eeh_pe { |
61 | int type; /* PE type: PHB/Bus/Device */ | |
62 | int state; /* PE EEH dependent mode */ | |
63 | int config_addr; /* Traditional PCI address */ | |
64 | int addr; /* PE configuration address */ | |
65 | struct pci_controller *phb; /* Associated PHB */ | |
8cdb2833 | 66 | struct pci_bus *bus; /* Top PCI bus for bus PE */ |
968f968f GS |
67 | int check_count; /* Times of ignored error */ |
68 | int freeze_count; /* Times of froze up */ | |
5a71978e | 69 | struct timeval tstamp; /* Time on first-time freeze */ |
968f968f GS |
70 | int false_positives; /* Times of reported #ff's */ |
71 | struct eeh_pe *parent; /* Parent PE */ | |
72 | struct list_head child_list; /* Link PE to the child list */ | |
73 | struct list_head edevs; /* Link list of EEH devices */ | |
74 | struct list_head child; /* Child PEs */ | |
75 | }; | |
76 | ||
9feed42e GS |
77 | #define eeh_pe_for_each_dev(pe, edev, tmp) \ |
78 | list_for_each_entry_safe(edev, tmp, &pe->edevs, list) | |
5b663529 | 79 | |
eb740b5f GS |
80 | /* |
81 | * The struct is used to trace EEH state for the associated | |
82 | * PCI device node or PCI device. In future, it might | |
83 | * represent PE as well so that the EEH device to form | |
84 | * another tree except the currently existing tree of PCI | |
85 | * buses and PCI devices | |
86 | */ | |
4b83bd45 GS |
87 | #define EEH_DEV_BRIDGE (1 << 0) /* PCI bridge */ |
88 | #define EEH_DEV_ROOT_PORT (1 << 1) /* PCIe root port */ | |
89 | #define EEH_DEV_DS_PORT (1 << 2) /* Downstream port */ | |
90 | #define EEH_DEV_IRQ_DISABLED (1 << 3) /* Interrupt disabled */ | |
91 | #define EEH_DEV_DISCONNECTED (1 << 4) /* Removing from PE */ | |
eb740b5f | 92 | |
ab55d218 GS |
93 | #define EEH_DEV_SYSFS (1 << 8) /* Sysfs created */ |
94 | ||
eb740b5f GS |
95 | struct eeh_dev { |
96 | int mode; /* EEH mode */ | |
97 | int class_code; /* Class code of the device */ | |
98 | int config_addr; /* Config address */ | |
99 | int pe_config_addr; /* PE config address */ | |
eb740b5f | 100 | u32 config_space[16]; /* Saved PCI config space */ |
4b83bd45 | 101 | u8 pcie_cap; /* Saved PCIe capability */ |
968f968f GS |
102 | struct eeh_pe *pe; /* Associated PE */ |
103 | struct list_head list; /* Form link list in the PE */ | |
eb740b5f GS |
104 | struct pci_controller *phb; /* Associated PHB */ |
105 | struct device_node *dn; /* Associated device node */ | |
106 | struct pci_dev *pdev; /* Associated PCI device */ | |
f5c57710 | 107 | struct pci_bus *bus; /* PCI bus for partial hotplug */ |
eb740b5f GS |
108 | }; |
109 | ||
110 | static inline struct device_node *eeh_dev_to_of_node(struct eeh_dev *edev) | |
111 | { | |
2d5c1216 | 112 | return edev ? edev->dn : NULL; |
eb740b5f GS |
113 | } |
114 | ||
115 | static inline struct pci_dev *eeh_dev_to_pci_dev(struct eeh_dev *edev) | |
116 | { | |
2d5c1216 | 117 | return edev ? edev->pdev : NULL; |
eb740b5f GS |
118 | } |
119 | ||
aa1e6374 GS |
120 | /* |
121 | * The struct is used to trace the registered EEH operation | |
122 | * callback functions. Actually, those operation callback | |
123 | * functions are heavily platform dependent. That means the | |
124 | * platform should register its own EEH operation callback | |
125 | * functions before any EEH further operations. | |
126 | */ | |
8fb8f709 GS |
127 | #define EEH_OPT_DISABLE 0 /* EEH disable */ |
128 | #define EEH_OPT_ENABLE 1 /* EEH enable */ | |
129 | #define EEH_OPT_THAW_MMIO 2 /* MMIO enable */ | |
130 | #define EEH_OPT_THAW_DMA 3 /* DMA enable */ | |
eb594a47 GS |
131 | #define EEH_STATE_UNAVAILABLE (1 << 0) /* State unavailable */ |
132 | #define EEH_STATE_NOT_SUPPORT (1 << 1) /* EEH not supported */ | |
133 | #define EEH_STATE_RESET_ACTIVE (1 << 2) /* Active reset */ | |
134 | #define EEH_STATE_MMIO_ACTIVE (1 << 3) /* Active MMIO */ | |
135 | #define EEH_STATE_DMA_ACTIVE (1 << 4) /* Active DMA */ | |
136 | #define EEH_STATE_MMIO_ENABLED (1 << 5) /* MMIO enabled */ | |
137 | #define EEH_STATE_DMA_ENABLED (1 << 6) /* DMA enabled */ | |
2652481f GS |
138 | #define EEH_RESET_DEACTIVATE 0 /* Deactivate the PE reset */ |
139 | #define EEH_RESET_HOT 1 /* Hot reset */ | |
140 | #define EEH_RESET_FUNDAMENTAL 3 /* Fundamental reset */ | |
8d633291 GS |
141 | #define EEH_LOG_TEMP 1 /* EEH temporary error log */ |
142 | #define EEH_LOG_PERM 2 /* EEH permanent error log */ | |
eb594a47 | 143 | |
aa1e6374 GS |
144 | struct eeh_ops { |
145 | char *name; | |
146 | int (*init)(void); | |
21fd21f5 | 147 | int (*post_init)(void); |
d7bb8862 | 148 | void* (*of_probe)(struct device_node *dn, void *flag); |
51fb5f56 | 149 | int (*dev_probe)(struct pci_dev *dev, void *flag); |
371a395d GS |
150 | int (*set_option)(struct eeh_pe *pe, int option); |
151 | int (*get_pe_addr)(struct eeh_pe *pe); | |
152 | int (*get_state)(struct eeh_pe *pe, int *state); | |
153 | int (*reset)(struct eeh_pe *pe, int option); | |
154 | int (*wait_state)(struct eeh_pe *pe, int max_wait); | |
155 | int (*get_log)(struct eeh_pe *pe, int severity, char *drv_log, unsigned long len); | |
156 | int (*configure_bridge)(struct eeh_pe *pe); | |
3780444c GS |
157 | int (*read_config)(struct device_node *dn, int where, int size, u32 *val); |
158 | int (*write_config)(struct device_node *dn, int where, int size, u32 val); | |
8a6b1bc7 | 159 | int (*next_error)(struct eeh_pe **pe); |
aa1e6374 GS |
160 | }; |
161 | ||
162 | extern struct eeh_ops *eeh_ops; | |
1e28a7dd | 163 | extern int eeh_subsystem_enabled; |
4907581d | 164 | extern raw_spinlock_t confirm_error_lock; |
d7bb8862 GS |
165 | extern int eeh_probe_mode; |
166 | ||
167 | #define EEH_PROBE_MODE_DEV (1<<0) /* From PCI device */ | |
168 | #define EEH_PROBE_MODE_DEVTREE (1<<1) /* From device tree */ | |
169 | ||
170 | static inline void eeh_probe_mode_set(int flag) | |
171 | { | |
172 | eeh_probe_mode = flag; | |
173 | } | |
174 | ||
175 | static inline int eeh_probe_mode_devtree(void) | |
176 | { | |
177 | return (eeh_probe_mode == EEH_PROBE_MODE_DEVTREE); | |
178 | } | |
179 | ||
180 | static inline int eeh_probe_mode_dev(void) | |
181 | { | |
182 | return (eeh_probe_mode == EEH_PROBE_MODE_DEV); | |
183 | } | |
646a8499 | 184 | |
4907581d GS |
185 | static inline void eeh_serialize_lock(unsigned long *flags) |
186 | { | |
187 | raw_spin_lock_irqsave(&confirm_error_lock, *flags); | |
188 | } | |
189 | ||
190 | static inline void eeh_serialize_unlock(unsigned long flags) | |
191 | { | |
192 | raw_spin_unlock_irqrestore(&confirm_error_lock, flags); | |
193 | } | |
194 | ||
cb3bc9d0 GS |
195 | /* |
196 | * Max number of EEH freezes allowed before we consider the device | |
197 | * to be permanently disabled. | |
198 | */ | |
172ca926 LV |
199 | #define EEH_MAX_ALLOWED_FREEZES 5 |
200 | ||
22f4ab12 | 201 | typedef void *(*eeh_traverse_func)(void *data, void *flag); |
cad5cef6 | 202 | int eeh_phb_pe_create(struct pci_controller *phb); |
9ff67433 | 203 | struct eeh_pe *eeh_phb_pe_get(struct pci_controller *phb); |
01566808 | 204 | struct eeh_pe *eeh_pe_get(struct eeh_dev *edev); |
9b84348c | 205 | int eeh_add_to_parent_pe(struct eeh_dev *edev); |
807a827d | 206 | int eeh_rmv_from_parent_pe(struct eeh_dev *edev); |
5a71978e | 207 | void eeh_pe_update_time_stamp(struct eeh_pe *pe); |
f5c57710 GS |
208 | void *eeh_pe_traverse(struct eeh_pe *root, |
209 | eeh_traverse_func fn, void *flag); | |
9e6d2cf6 GS |
210 | void *eeh_pe_dev_traverse(struct eeh_pe *root, |
211 | eeh_traverse_func fn, void *flag); | |
212 | void eeh_pe_restore_bars(struct eeh_pe *pe); | |
9b3c76f0 | 213 | struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe); |
55037d17 | 214 | |
cad5cef6 GKH |
215 | void *eeh_dev_init(struct device_node *dn, void *data); |
216 | void eeh_dev_phb_init_dynamic(struct pci_controller *phb); | |
eeb6361f | 217 | int eeh_init(void); |
aa1e6374 GS |
218 | int __init eeh_ops_register(struct eeh_ops *ops); |
219 | int __exit eeh_ops_unregister(const char *name); | |
1da177e4 LT |
220 | unsigned long eeh_check_failure(const volatile void __iomem *token, |
221 | unsigned long val); | |
f8f7d63f | 222 | int eeh_dev_check_failure(struct eeh_dev *edev); |
eeb6361f | 223 | void eeh_addr_cache_build(void); |
f2856491 | 224 | void eeh_add_device_early(struct device_node *); |
e2a296ee | 225 | void eeh_add_device_tree_early(struct device_node *); |
f2856491 | 226 | void eeh_add_device_late(struct pci_dev *); |
827c1a6c | 227 | void eeh_add_device_tree_late(struct pci_bus *); |
6a040ce7 | 228 | void eeh_add_sysfs_files(struct pci_bus *); |
807a827d | 229 | void eeh_remove_device(struct pci_dev *); |
e2a296ee | 230 | |
1da177e4 LT |
231 | /** |
232 | * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. | |
233 | * | |
234 | * If this macro yields TRUE, the caller relays to eeh_check_failure() | |
235 | * which does further tests out of line. | |
236 | */ | |
1e28a7dd | 237 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_subsystem_enabled) |
1da177e4 LT |
238 | |
239 | /* | |
240 | * Reads from a device which has been isolated by EEH will return | |
241 | * all 1s. This macro gives an all-1s value of the given size (in | |
242 | * bytes: 1, 2, or 4) for comparing with the result of a read. | |
243 | */ | |
244 | #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8)) | |
245 | ||
246 | #else /* !CONFIG_EEH */ | |
eb740b5f | 247 | |
51fb5f56 GS |
248 | static inline int eeh_init(void) |
249 | { | |
250 | return 0; | |
251 | } | |
252 | ||
eb740b5f GS |
253 | static inline void *eeh_dev_init(struct device_node *dn, void *data) |
254 | { | |
255 | return NULL; | |
256 | } | |
257 | ||
258 | static inline void eeh_dev_phb_init_dynamic(struct pci_controller *phb) { } | |
259 | ||
1da177e4 LT |
260 | static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val) |
261 | { | |
262 | return val; | |
263 | } | |
264 | ||
f8f7d63f | 265 | #define eeh_dev_check_failure(x) (0) |
1da177e4 | 266 | |
3ab96a02 | 267 | static inline void eeh_addr_cache_build(void) { } |
1da177e4 | 268 | |
f2856491 GS |
269 | static inline void eeh_add_device_early(struct device_node *dn) { } |
270 | ||
022930eb HM |
271 | static inline void eeh_add_device_tree_early(struct device_node *dn) { } |
272 | ||
f2856491 GS |
273 | static inline void eeh_add_device_late(struct pci_dev *dev) { } |
274 | ||
827c1a6c JR |
275 | static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } |
276 | ||
6a040ce7 TLSC |
277 | static inline void eeh_add_sysfs_files(struct pci_bus *bus) { } |
278 | ||
807a827d | 279 | static inline void eeh_remove_device(struct pci_dev *dev) { } |
646a8499 | 280 | |
1da177e4 LT |
281 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
282 | #define EEH_IO_ERROR_VALUE(size) (-1UL) | |
283 | #endif /* CONFIG_EEH */ | |
284 | ||
8b8da358 | 285 | #ifdef CONFIG_PPC64 |
172ca926 | 286 | /* |
1da177e4 LT |
287 | * MMIO read/write operations with EEH support. |
288 | */ | |
289 | static inline u8 eeh_readb(const volatile void __iomem *addr) | |
290 | { | |
291 | u8 val = in_8(addr); | |
292 | if (EEH_POSSIBLE_ERROR(val, u8)) | |
293 | return eeh_check_failure(addr, val); | |
294 | return val; | |
295 | } | |
1da177e4 LT |
296 | |
297 | static inline u16 eeh_readw(const volatile void __iomem *addr) | |
298 | { | |
299 | u16 val = in_le16(addr); | |
300 | if (EEH_POSSIBLE_ERROR(val, u16)) | |
301 | return eeh_check_failure(addr, val); | |
302 | return val; | |
303 | } | |
1da177e4 LT |
304 | |
305 | static inline u32 eeh_readl(const volatile void __iomem *addr) | |
306 | { | |
307 | u32 val = in_le32(addr); | |
308 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
309 | return eeh_check_failure(addr, val); | |
310 | return val; | |
311 | } | |
4cb3cee0 BH |
312 | |
313 | static inline u64 eeh_readq(const volatile void __iomem *addr) | |
1da177e4 | 314 | { |
4cb3cee0 BH |
315 | u64 val = in_le64(addr); |
316 | if (EEH_POSSIBLE_ERROR(val, u64)) | |
1da177e4 LT |
317 | return eeh_check_failure(addr, val); |
318 | return val; | |
319 | } | |
1da177e4 | 320 | |
4cb3cee0 | 321 | static inline u16 eeh_readw_be(const volatile void __iomem *addr) |
1da177e4 | 322 | { |
4cb3cee0 BH |
323 | u16 val = in_be16(addr); |
324 | if (EEH_POSSIBLE_ERROR(val, u16)) | |
1da177e4 LT |
325 | return eeh_check_failure(addr, val); |
326 | return val; | |
327 | } | |
4cb3cee0 BH |
328 | |
329 | static inline u32 eeh_readl_be(const volatile void __iomem *addr) | |
1da177e4 | 330 | { |
4cb3cee0 BH |
331 | u32 val = in_be32(addr); |
332 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
333 | return eeh_check_failure(addr, val); | |
334 | return val; | |
1da177e4 | 335 | } |
4cb3cee0 BH |
336 | |
337 | static inline u64 eeh_readq_be(const volatile void __iomem *addr) | |
1da177e4 LT |
338 | { |
339 | u64 val = in_be64(addr); | |
340 | if (EEH_POSSIBLE_ERROR(val, u64)) | |
341 | return eeh_check_failure(addr, val); | |
342 | return val; | |
343 | } | |
1da177e4 | 344 | |
68a64357 BH |
345 | static inline void eeh_memcpy_fromio(void *dest, const |
346 | volatile void __iomem *src, | |
1da177e4 LT |
347 | unsigned long n) |
348 | { | |
68a64357 | 349 | _memcpy_fromio(dest, src, n); |
1da177e4 LT |
350 | |
351 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes | |
352 | * were copied. Check all four bytes. | |
353 | */ | |
68a64357 BH |
354 | if (n >= 4 && EEH_POSSIBLE_ERROR(*((u32 *)(dest + n - 4)), u32)) |
355 | eeh_check_failure(src, *((u32 *)(dest + n - 4))); | |
1da177e4 LT |
356 | } |
357 | ||
1da177e4 | 358 | /* in-string eeh macros */ |
4cb3cee0 BH |
359 | static inline void eeh_readsb(const volatile void __iomem *addr, void * buf, |
360 | int ns) | |
1da177e4 | 361 | { |
4cb3cee0 | 362 | _insb(addr, buf, ns); |
1da177e4 | 363 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) |
4cb3cee0 | 364 | eeh_check_failure(addr, *(u8*)buf); |
1da177e4 LT |
365 | } |
366 | ||
4cb3cee0 BH |
367 | static inline void eeh_readsw(const volatile void __iomem *addr, void * buf, |
368 | int ns) | |
1da177e4 | 369 | { |
4cb3cee0 | 370 | _insw(addr, buf, ns); |
1da177e4 | 371 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) |
4cb3cee0 | 372 | eeh_check_failure(addr, *(u16*)buf); |
1da177e4 LT |
373 | } |
374 | ||
4cb3cee0 BH |
375 | static inline void eeh_readsl(const volatile void __iomem *addr, void * buf, |
376 | int nl) | |
1da177e4 | 377 | { |
4cb3cee0 | 378 | _insl(addr, buf, nl); |
1da177e4 | 379 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) |
4cb3cee0 | 380 | eeh_check_failure(addr, *(u32*)buf); |
1da177e4 LT |
381 | } |
382 | ||
8b8da358 | 383 | #endif /* CONFIG_PPC64 */ |
88ced031 | 384 | #endif /* __KERNEL__ */ |
8b8da358 | 385 | #endif /* _POWERPC_EEH_H */ |