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Commit | Line | Data |
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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> |
05ec424e | 28 | #include <linux/atomic.h> |
1da177e4 | 29 | |
ed3e81ff GS |
30 | #include <uapi/asm/eeh.h> |
31 | ||
1da177e4 | 32 | struct pci_dev; |
827c1a6c | 33 | struct pci_bus; |
e8e9b34c | 34 | struct pci_dn; |
1da177e4 LT |
35 | |
36 | #ifdef CONFIG_EEH | |
37 | ||
8a5ad356 | 38 | /* EEH subsystem flags */ |
dc561fb9 GS |
39 | #define EEH_ENABLED 0x01 /* EEH enabled */ |
40 | #define EEH_FORCE_DISABLED 0x02 /* EEH disabled */ | |
41 | #define EEH_PROBE_MODE_DEV 0x04 /* From PCI device */ | |
42 | #define EEH_PROBE_MODE_DEVTREE 0x08 /* From device tree */ | |
2aa5cf9e GS |
43 | #define EEH_VALID_PE_ZERO 0x10 /* PE#0 is valid */ |
44 | #define EEH_ENABLE_IO_FOR_LOG 0x20 /* Enable IO for log */ | |
45 | #define EEH_EARLY_DUMP_LOG 0x40 /* Dump log immediately */ | |
8a5ad356 | 46 | |
26833a50 GS |
47 | /* |
48 | * Delay for PE reset, all in ms | |
49 | * | |
50 | * PCI specification has reset hold time of 100 milliseconds. | |
51 | * We have 250 milliseconds here. The PCI bus settlement time | |
52 | * is specified as 1.5 seconds and we have 1.8 seconds. | |
53 | */ | |
54 | #define EEH_PE_RST_HOLD_TIME 250 | |
55 | #define EEH_PE_RST_SETTLE_TIME 1800 | |
56 | ||
968f968f GS |
57 | /* |
58 | * The struct is used to trace PE related EEH functionality. | |
59 | * In theory, there will have one instance of the struct to | |
027dfac6 | 60 | * be created against particular PE. In nature, PEs correlate |
968f968f GS |
61 | * to each other. the struct has to reflect that hierarchy in |
62 | * order to easily pick up those affected PEs when one particular | |
63 | * PE has EEH errors. | |
64 | * | |
65 | * Also, one particular PE might be composed of PCI device, PCI | |
66 | * bus and its subordinate components. The struct also need ship | |
67 | * the information. Further more, one particular PE is only meaingful | |
68 | * in the corresponding PHB. Therefore, the root PEs should be created | |
69 | * against existing PHBs in on-to-one fashion. | |
70 | */ | |
5efc3ad7 GS |
71 | #define EEH_PE_INVALID (1 << 0) /* Invalid */ |
72 | #define EEH_PE_PHB (1 << 1) /* PHB PE */ | |
73 | #define EEH_PE_DEVICE (1 << 2) /* Device PE */ | |
74 | #define EEH_PE_BUS (1 << 3) /* Bus PE */ | |
c29fa27d | 75 | #define EEH_PE_VF (1 << 4) /* VF PE */ |
968f968f GS |
76 | |
77 | #define EEH_PE_ISOLATED (1 << 0) /* Isolated PE */ | |
78 | #define EEH_PE_RECOVERING (1 << 1) /* Recovering PE */ | |
8a6b3710 | 79 | #define EEH_PE_CFG_BLOCKED (1 << 2) /* Block config access */ |
28bf36f9 | 80 | #define EEH_PE_RESET (1 << 3) /* PE reset in progress */ |
968f968f | 81 | |
807a827d | 82 | #define EEH_PE_KEEP (1 << 8) /* Keep PE on hotplug */ |
b6541db1 | 83 | #define EEH_PE_CFG_RESTRICTED (1 << 9) /* Block config on error */ |
432227e9 | 84 | #define EEH_PE_REMOVED (1 << 10) /* Removed permanently */ |
05ba75f8 | 85 | #define EEH_PE_PRI_BUS (1 << 11) /* Cached primary bus */ |
807a827d | 86 | |
968f968f GS |
87 | struct eeh_pe { |
88 | int type; /* PE type: PHB/Bus/Device */ | |
89 | int state; /* PE EEH dependent mode */ | |
90 | int config_addr; /* Traditional PCI address */ | |
91 | int addr; /* PE configuration address */ | |
92 | struct pci_controller *phb; /* Associated PHB */ | |
8cdb2833 | 93 | struct pci_bus *bus; /* Top PCI bus for bus PE */ |
968f968f GS |
94 | int check_count; /* Times of ignored error */ |
95 | int freeze_count; /* Times of froze up */ | |
edfd17ff | 96 | time64_t tstamp; /* Time on first-time freeze */ |
968f968f | 97 | int false_positives; /* Times of reported #ff's */ |
05ec424e | 98 | atomic_t pass_dev_cnt; /* Count of passed through devs */ |
968f968f | 99 | struct eeh_pe *parent; /* Parent PE */ |
bb593c00 | 100 | void *data; /* PE auxillary data */ |
968f968f GS |
101 | struct list_head child_list; /* Link PE to the child list */ |
102 | struct list_head edevs; /* Link list of EEH devices */ | |
103 | struct list_head child; /* Child PEs */ | |
104 | }; | |
105 | ||
9feed42e GS |
106 | #define eeh_pe_for_each_dev(pe, edev, tmp) \ |
107 | list_for_each_entry_safe(edev, tmp, &pe->edevs, list) | |
5b663529 | 108 | |
05ec424e GS |
109 | static inline bool eeh_pe_passed(struct eeh_pe *pe) |
110 | { | |
111 | return pe ? !!atomic_read(&pe->pass_dev_cnt) : false; | |
112 | } | |
113 | ||
eb740b5f GS |
114 | /* |
115 | * The struct is used to trace EEH state for the associated | |
116 | * PCI device node or PCI device. In future, it might | |
117 | * represent PE as well so that the EEH device to form | |
118 | * another tree except the currently existing tree of PCI | |
119 | * buses and PCI devices | |
120 | */ | |
4b83bd45 GS |
121 | #define EEH_DEV_BRIDGE (1 << 0) /* PCI bridge */ |
122 | #define EEH_DEV_ROOT_PORT (1 << 1) /* PCIe root port */ | |
123 | #define EEH_DEV_DS_PORT (1 << 2) /* Downstream port */ | |
124 | #define EEH_DEV_IRQ_DISABLED (1 << 3) /* Interrupt disabled */ | |
125 | #define EEH_DEV_DISCONNECTED (1 << 4) /* Removing from PE */ | |
eb740b5f | 126 | |
f26c7a03 GS |
127 | #define EEH_DEV_NO_HANDLER (1 << 8) /* No error handler */ |
128 | #define EEH_DEV_SYSFS (1 << 9) /* Sysfs created */ | |
d2b0f6f7 | 129 | #define EEH_DEV_REMOVED (1 << 10) /* Removed permanently */ |
ab55d218 | 130 | |
eb740b5f GS |
131 | struct eeh_dev { |
132 | int mode; /* EEH mode */ | |
133 | int class_code; /* Class code of the device */ | |
eb740b5f | 134 | int pe_config_addr; /* PE config address */ |
eb740b5f | 135 | u32 config_space[16]; /* Saved PCI config space */ |
2a18dfc6 GS |
136 | int pcix_cap; /* Saved PCIx capability */ |
137 | int pcie_cap; /* Saved PCIe capability */ | |
138 | int aer_cap; /* Saved AER capability */ | |
9312bc5b | 139 | int af_cap; /* Saved AF capability */ |
968f968f GS |
140 | struct eeh_pe *pe; /* Associated PE */ |
141 | struct list_head list; /* Form link list in the PE */ | |
67086e32 | 142 | struct list_head rmv_list; /* Record the removed edevs */ |
e8e9b34c | 143 | struct pci_dn *pdn; /* Associated PCI device node */ |
eb740b5f | 144 | struct pci_dev *pdev; /* Associated PCI device */ |
67086e32 | 145 | bool in_error; /* Error flag for edev */ |
39218cd0 | 146 | struct pci_dev *physfn; /* Associated SRIOV PF */ |
f5c57710 | 147 | struct pci_bus *bus; /* PCI bus for partial hotplug */ |
eb740b5f GS |
148 | }; |
149 | ||
e8e9b34c GS |
150 | static inline struct pci_dn *eeh_dev_to_pdn(struct eeh_dev *edev) |
151 | { | |
152 | return edev ? edev->pdn : NULL; | |
153 | } | |
154 | ||
eb740b5f GS |
155 | static inline struct pci_dev *eeh_dev_to_pci_dev(struct eeh_dev *edev) |
156 | { | |
2d5c1216 | 157 | return edev ? edev->pdev : NULL; |
eb740b5f GS |
158 | } |
159 | ||
2a58222f WY |
160 | static inline struct eeh_pe *eeh_dev_to_pe(struct eeh_dev* edev) |
161 | { | |
162 | return edev ? edev->pe : NULL; | |
163 | } | |
164 | ||
7e4e7867 GS |
165 | /* Return values from eeh_ops::next_error */ |
166 | enum { | |
167 | EEH_NEXT_ERR_NONE = 0, | |
168 | EEH_NEXT_ERR_INF, | |
169 | EEH_NEXT_ERR_FROZEN_PE, | |
170 | EEH_NEXT_ERR_FENCED_PHB, | |
171 | EEH_NEXT_ERR_DEAD_PHB, | |
172 | EEH_NEXT_ERR_DEAD_IOC | |
173 | }; | |
174 | ||
aa1e6374 GS |
175 | /* |
176 | * The struct is used to trace the registered EEH operation | |
177 | * callback functions. Actually, those operation callback | |
178 | * functions are heavily platform dependent. That means the | |
179 | * platform should register its own EEH operation callback | |
180 | * functions before any EEH further operations. | |
181 | */ | |
8fb8f709 GS |
182 | #define EEH_OPT_DISABLE 0 /* EEH disable */ |
183 | #define EEH_OPT_ENABLE 1 /* EEH enable */ | |
184 | #define EEH_OPT_THAW_MMIO 2 /* MMIO enable */ | |
185 | #define EEH_OPT_THAW_DMA 3 /* DMA enable */ | |
0d5ee520 | 186 | #define EEH_OPT_FREEZE_PE 4 /* Freeze PE */ |
eb594a47 GS |
187 | #define EEH_STATE_UNAVAILABLE (1 << 0) /* State unavailable */ |
188 | #define EEH_STATE_NOT_SUPPORT (1 << 1) /* EEH not supported */ | |
189 | #define EEH_STATE_RESET_ACTIVE (1 << 2) /* Active reset */ | |
190 | #define EEH_STATE_MMIO_ACTIVE (1 << 3) /* Active MMIO */ | |
191 | #define EEH_STATE_DMA_ACTIVE (1 << 4) /* Active DMA */ | |
192 | #define EEH_STATE_MMIO_ENABLED (1 << 5) /* MMIO enabled */ | |
193 | #define EEH_STATE_DMA_ENABLED (1 << 6) /* DMA enabled */ | |
2652481f GS |
194 | #define EEH_RESET_DEACTIVATE 0 /* Deactivate the PE reset */ |
195 | #define EEH_RESET_HOT 1 /* Hot reset */ | |
196 | #define EEH_RESET_FUNDAMENTAL 3 /* Fundamental reset */ | |
8d633291 GS |
197 | #define EEH_LOG_TEMP 1 /* EEH temporary error log */ |
198 | #define EEH_LOG_PERM 2 /* EEH permanent error log */ | |
eb594a47 | 199 | |
aa1e6374 GS |
200 | struct eeh_ops { |
201 | char *name; | |
202 | int (*init)(void); | |
ff57b454 | 203 | void* (*probe)(struct pci_dn *pdn, void *data); |
371a395d GS |
204 | int (*set_option)(struct eeh_pe *pe, int option); |
205 | int (*get_pe_addr)(struct eeh_pe *pe); | |
206 | int (*get_state)(struct eeh_pe *pe, int *state); | |
207 | int (*reset)(struct eeh_pe *pe, int option); | |
208 | int (*wait_state)(struct eeh_pe *pe, int max_wait); | |
209 | int (*get_log)(struct eeh_pe *pe, int severity, char *drv_log, unsigned long len); | |
210 | int (*configure_bridge)(struct eeh_pe *pe); | |
131c123a GS |
211 | int (*err_inject)(struct eeh_pe *pe, int type, int func, |
212 | unsigned long addr, unsigned long mask); | |
0bd78587 GS |
213 | int (*read_config)(struct pci_dn *pdn, int where, int size, u32 *val); |
214 | int (*write_config)(struct pci_dn *pdn, int where, int size, u32 val); | |
8a6b1bc7 | 215 | int (*next_error)(struct eeh_pe **pe); |
0bd78587 | 216 | int (*restore_config)(struct pci_dn *pdn); |
aa1e6374 GS |
217 | }; |
218 | ||
8a5ad356 | 219 | extern int eeh_subsystem_flags; |
1b28f170 | 220 | extern int eeh_max_freezes; |
aa1e6374 | 221 | extern struct eeh_ops *eeh_ops; |
4907581d | 222 | extern raw_spinlock_t confirm_error_lock; |
d7bb8862 | 223 | |
05b1721d | 224 | static inline void eeh_add_flag(int flag) |
2ec5a0ad | 225 | { |
05b1721d | 226 | eeh_subsystem_flags |= flag; |
2ec5a0ad GS |
227 | } |
228 | ||
05b1721d | 229 | static inline void eeh_clear_flag(int flag) |
2ec5a0ad | 230 | { |
05b1721d | 231 | eeh_subsystem_flags &= ~flag; |
2ec5a0ad GS |
232 | } |
233 | ||
05b1721d | 234 | static inline bool eeh_has_flag(int flag) |
d7bb8862 | 235 | { |
05b1721d | 236 | return !!(eeh_subsystem_flags & flag); |
d7bb8862 GS |
237 | } |
238 | ||
05b1721d | 239 | static inline bool eeh_enabled(void) |
d7bb8862 | 240 | { |
05b1721d GS |
241 | if (eeh_has_flag(EEH_FORCE_DISABLED) || |
242 | !eeh_has_flag(EEH_ENABLED)) | |
243 | return false; | |
d7bb8862 | 244 | |
05b1721d | 245 | return true; |
d7bb8862 | 246 | } |
646a8499 | 247 | |
4907581d GS |
248 | static inline void eeh_serialize_lock(unsigned long *flags) |
249 | { | |
250 | raw_spin_lock_irqsave(&confirm_error_lock, *flags); | |
251 | } | |
252 | ||
253 | static inline void eeh_serialize_unlock(unsigned long flags) | |
254 | { | |
255 | raw_spin_unlock_irqrestore(&confirm_error_lock, flags); | |
256 | } | |
257 | ||
22f4ab12 | 258 | typedef void *(*eeh_traverse_func)(void *data, void *flag); |
bb593c00 | 259 | void eeh_set_pe_aux_size(int size); |
cad5cef6 | 260 | int eeh_phb_pe_create(struct pci_controller *phb); |
9ff67433 | 261 | struct eeh_pe *eeh_phb_pe_get(struct pci_controller *phb); |
8bae6a23 AK |
262 | struct eeh_pe *eeh_pe_get(struct pci_controller *phb, |
263 | int pe_no, int config_addr); | |
9b84348c | 264 | int eeh_add_to_parent_pe(struct eeh_dev *edev); |
807a827d | 265 | int eeh_rmv_from_parent_pe(struct eeh_dev *edev); |
5a71978e | 266 | void eeh_pe_update_time_stamp(struct eeh_pe *pe); |
f5c57710 GS |
267 | void *eeh_pe_traverse(struct eeh_pe *root, |
268 | eeh_traverse_func fn, void *flag); | |
9e6d2cf6 GS |
269 | void *eeh_pe_dev_traverse(struct eeh_pe *root, |
270 | eeh_traverse_func fn, void *flag); | |
271 | void eeh_pe_restore_bars(struct eeh_pe *pe); | |
357b2f3d | 272 | const char *eeh_pe_loc_get(struct eeh_pe *pe); |
9b3c76f0 | 273 | struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe); |
55037d17 | 274 | |
8cc7581c | 275 | struct eeh_dev *eeh_dev_init(struct pci_dn *pdn); |
cad5cef6 | 276 | void eeh_dev_phb_init_dynamic(struct pci_controller *phb); |
b9fde58d | 277 | void eeh_probe_devices(void); |
aa1e6374 GS |
278 | int __init eeh_ops_register(struct eeh_ops *ops); |
279 | int __exit eeh_ops_unregister(const char *name); | |
3e938052 | 280 | int eeh_check_failure(const volatile void __iomem *token); |
f8f7d63f | 281 | int eeh_dev_check_failure(struct eeh_dev *edev); |
eeb6361f | 282 | void eeh_addr_cache_build(void); |
ff57b454 GS |
283 | void eeh_add_device_early(struct pci_dn *); |
284 | void eeh_add_device_tree_early(struct pci_dn *); | |
f2856491 | 285 | void eeh_add_device_late(struct pci_dev *); |
827c1a6c | 286 | void eeh_add_device_tree_late(struct pci_bus *); |
6a040ce7 | 287 | void eeh_add_sysfs_files(struct pci_bus *); |
807a827d | 288 | void eeh_remove_device(struct pci_dev *); |
4eeeff0e | 289 | int eeh_unfreeze_pe(struct eeh_pe *pe, bool sw_state); |
5cfb20b9 | 290 | int eeh_pe_reset_and_recover(struct eeh_pe *pe); |
212d16cd GS |
291 | int eeh_dev_open(struct pci_dev *pdev); |
292 | void eeh_dev_release(struct pci_dev *pdev); | |
293 | struct eeh_pe *eeh_iommu_group_to_pe(struct iommu_group *group); | |
294 | int eeh_pe_set_option(struct eeh_pe *pe, int option); | |
295 | int eeh_pe_get_state(struct eeh_pe *pe); | |
296 | int eeh_pe_reset(struct eeh_pe *pe, int option); | |
297 | int eeh_pe_configure(struct eeh_pe *pe); | |
ec33d36e GS |
298 | int eeh_pe_inject_err(struct eeh_pe *pe, int type, int func, |
299 | unsigned long addr, unsigned long mask); | |
64ba3dc7 | 300 | int eeh_restore_vf_config(struct pci_dn *pdn); |
e2a296ee | 301 | |
1da177e4 LT |
302 | /** |
303 | * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. | |
304 | * | |
305 | * If this macro yields TRUE, the caller relays to eeh_check_failure() | |
306 | * which does further tests out of line. | |
307 | */ | |
2ec5a0ad | 308 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_enabled()) |
1da177e4 LT |
309 | |
310 | /* | |
311 | * Reads from a device which has been isolated by EEH will return | |
312 | * all 1s. This macro gives an all-1s value of the given size (in | |
313 | * bytes: 1, 2, or 4) for comparing with the result of a read. | |
314 | */ | |
315 | #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8)) | |
316 | ||
317 | #else /* !CONFIG_EEH */ | |
eb740b5f | 318 | |
2ec5a0ad GS |
319 | static inline bool eeh_enabled(void) |
320 | { | |
321 | return false; | |
322 | } | |
323 | ||
b9fde58d | 324 | static inline void eeh_probe_devices(void) { } |
51fb5f56 | 325 | |
e8e9b34c | 326 | static inline void *eeh_dev_init(struct pci_dn *pdn, void *data) |
eb740b5f GS |
327 | { |
328 | return NULL; | |
329 | } | |
330 | ||
331 | static inline void eeh_dev_phb_init_dynamic(struct pci_controller *phb) { } | |
332 | ||
3e938052 | 333 | static inline int eeh_check_failure(const volatile void __iomem *token) |
1da177e4 | 334 | { |
3e938052 | 335 | return 0; |
1da177e4 LT |
336 | } |
337 | ||
f8f7d63f | 338 | #define eeh_dev_check_failure(x) (0) |
1da177e4 | 339 | |
3ab96a02 | 340 | static inline void eeh_addr_cache_build(void) { } |
1da177e4 | 341 | |
ff57b454 | 342 | static inline void eeh_add_device_early(struct pci_dn *pdn) { } |
f2856491 | 343 | |
ff57b454 | 344 | static inline void eeh_add_device_tree_early(struct pci_dn *pdn) { } |
022930eb | 345 | |
f2856491 GS |
346 | static inline void eeh_add_device_late(struct pci_dev *dev) { } |
347 | ||
827c1a6c JR |
348 | static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } |
349 | ||
6a040ce7 TLSC |
350 | static inline void eeh_add_sysfs_files(struct pci_bus *bus) { } |
351 | ||
807a827d | 352 | static inline void eeh_remove_device(struct pci_dev *dev) { } |
646a8499 | 353 | |
1da177e4 LT |
354 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
355 | #define EEH_IO_ERROR_VALUE(size) (-1UL) | |
356 | #endif /* CONFIG_EEH */ | |
357 | ||
8b8da358 | 358 | #ifdef CONFIG_PPC64 |
172ca926 | 359 | /* |
1da177e4 LT |
360 | * MMIO read/write operations with EEH support. |
361 | */ | |
362 | static inline u8 eeh_readb(const volatile void __iomem *addr) | |
363 | { | |
364 | u8 val = in_8(addr); | |
365 | if (EEH_POSSIBLE_ERROR(val, u8)) | |
3e938052 | 366 | eeh_check_failure(addr); |
1da177e4 LT |
367 | return val; |
368 | } | |
1da177e4 LT |
369 | |
370 | static inline u16 eeh_readw(const volatile void __iomem *addr) | |
371 | { | |
372 | u16 val = in_le16(addr); | |
373 | if (EEH_POSSIBLE_ERROR(val, u16)) | |
3e938052 | 374 | eeh_check_failure(addr); |
1da177e4 LT |
375 | return val; |
376 | } | |
1da177e4 LT |
377 | |
378 | static inline u32 eeh_readl(const volatile void __iomem *addr) | |
379 | { | |
380 | u32 val = in_le32(addr); | |
381 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
3e938052 | 382 | eeh_check_failure(addr); |
1da177e4 LT |
383 | return val; |
384 | } | |
4cb3cee0 BH |
385 | |
386 | static inline u64 eeh_readq(const volatile void __iomem *addr) | |
1da177e4 | 387 | { |
4cb3cee0 BH |
388 | u64 val = in_le64(addr); |
389 | if (EEH_POSSIBLE_ERROR(val, u64)) | |
3e938052 | 390 | eeh_check_failure(addr); |
1da177e4 LT |
391 | return val; |
392 | } | |
1da177e4 | 393 | |
4cb3cee0 | 394 | static inline u16 eeh_readw_be(const volatile void __iomem *addr) |
1da177e4 | 395 | { |
4cb3cee0 BH |
396 | u16 val = in_be16(addr); |
397 | if (EEH_POSSIBLE_ERROR(val, u16)) | |
3e938052 | 398 | eeh_check_failure(addr); |
1da177e4 LT |
399 | return val; |
400 | } | |
4cb3cee0 BH |
401 | |
402 | static inline u32 eeh_readl_be(const volatile void __iomem *addr) | |
1da177e4 | 403 | { |
4cb3cee0 BH |
404 | u32 val = in_be32(addr); |
405 | if (EEH_POSSIBLE_ERROR(val, u32)) | |
3e938052 | 406 | eeh_check_failure(addr); |
4cb3cee0 | 407 | return val; |
1da177e4 | 408 | } |
4cb3cee0 BH |
409 | |
410 | static inline u64 eeh_readq_be(const volatile void __iomem *addr) | |
1da177e4 LT |
411 | { |
412 | u64 val = in_be64(addr); | |
413 | if (EEH_POSSIBLE_ERROR(val, u64)) | |
3e938052 | 414 | eeh_check_failure(addr); |
1da177e4 LT |
415 | return val; |
416 | } | |
1da177e4 | 417 | |
68a64357 BH |
418 | static inline void eeh_memcpy_fromio(void *dest, const |
419 | volatile void __iomem *src, | |
1da177e4 LT |
420 | unsigned long n) |
421 | { | |
68a64357 | 422 | _memcpy_fromio(dest, src, n); |
1da177e4 LT |
423 | |
424 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes | |
425 | * were copied. Check all four bytes. | |
426 | */ | |
68a64357 | 427 | if (n >= 4 && EEH_POSSIBLE_ERROR(*((u32 *)(dest + n - 4)), u32)) |
3e938052 | 428 | eeh_check_failure(src); |
1da177e4 LT |
429 | } |
430 | ||
1da177e4 | 431 | /* in-string eeh macros */ |
4cb3cee0 BH |
432 | static inline void eeh_readsb(const volatile void __iomem *addr, void * buf, |
433 | int ns) | |
1da177e4 | 434 | { |
4cb3cee0 | 435 | _insb(addr, buf, ns); |
1da177e4 | 436 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) |
3e938052 | 437 | eeh_check_failure(addr); |
1da177e4 LT |
438 | } |
439 | ||
4cb3cee0 BH |
440 | static inline void eeh_readsw(const volatile void __iomem *addr, void * buf, |
441 | int ns) | |
1da177e4 | 442 | { |
4cb3cee0 | 443 | _insw(addr, buf, ns); |
1da177e4 | 444 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) |
3e938052 | 445 | eeh_check_failure(addr); |
1da177e4 LT |
446 | } |
447 | ||
4cb3cee0 BH |
448 | static inline void eeh_readsl(const volatile void __iomem *addr, void * buf, |
449 | int nl) | |
1da177e4 | 450 | { |
4cb3cee0 | 451 | _insl(addr, buf, nl); |
1da177e4 | 452 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) |
3e938052 | 453 | eeh_check_failure(addr); |
1da177e4 LT |
454 | } |
455 | ||
8b8da358 | 456 | #endif /* CONFIG_PPC64 */ |
88ced031 | 457 | #endif /* __KERNEL__ */ |
8b8da358 | 458 | #endif /* _POWERPC_EEH_H */ |