Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation. |
Gavin Shan | cb3bc9d | 2012-02-27 20:03:51 +0000 | [diff] [blame] | 3 | * Copyright 2001-2012 IBM Corporation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 14 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 20 | #ifndef _POWERPC_EEH_H |
| 21 | #define _POWERPC_EEH_H |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 22 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/init.h> |
| 25 | #include <linux/list.h> |
| 26 | #include <linux/string.h> |
| 27 | |
| 28 | struct pci_dev; |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 29 | struct pci_bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | struct device_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | #ifdef CONFIG_EEH |
| 33 | |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 34 | /* |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 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 | */ |
Gavin Shan | 5efc3ad | 2012-09-11 19:16:16 +0000 | [diff] [blame^] | 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 */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 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 | |
Gavin Shan | 5b66352 | 2012-09-07 22:44:12 +0000 | [diff] [blame] | 71 | #define eeh_pe_for_each_dev(pe, edev) \ |
| 72 | list_for_each_entry(edev, &pe->edevs, list) |
| 73 | |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 74 | /* |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 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 | */ |
Gavin Shan | dbbceee | 2012-09-07 22:44:20 +0000 | [diff] [blame] | 81 | #define EEH_DEV_IRQ_DISABLED (1<<0) /* Interrupt disabled */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 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 */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 88 | u32 config_space[16]; /* Saved PCI config space */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 89 | struct eeh_pe *pe; /* Associated PE */ |
| 90 | struct list_head list; /* Form link list in the PE */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 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 | |
| 106 | /* |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 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 | */ |
Gavin Shan | 8fb8f70 | 2012-02-27 20:03:55 +0000 | [diff] [blame] | 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 */ |
Gavin Shan | eb594a4 | 2012-02-27 20:03:57 +0000 | [diff] [blame] | 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 */ |
Gavin Shan | 2652481 | 2012-02-27 20:03:59 +0000 | [diff] [blame] | 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 */ |
Gavin Shan | 8d63329 | 2012-02-27 20:04:00 +0000 | [diff] [blame] | 127 | #define EEH_LOG_TEMP 1 /* EEH temporary error log */ |
| 128 | #define EEH_LOG_PERM 2 /* EEH permanent error log */ |
Gavin Shan | eb594a4 | 2012-02-27 20:03:57 +0000 | [diff] [blame] | 129 | |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 130 | struct eeh_ops { |
| 131 | char *name; |
| 132 | int (*init)(void); |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 133 | void* (*of_probe)(struct device_node *dn, void *flag); |
| 134 | void* (*dev_probe)(struct pci_dev *dev, void *flag); |
Gavin Shan | 371a395 | 2012-09-07 22:44:14 +0000 | [diff] [blame] | 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); |
Gavin Shan | 3780444 | 2012-02-27 20:04:11 +0000 | [diff] [blame] | 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); |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 144 | }; |
| 145 | |
| 146 | extern struct eeh_ops *eeh_ops; |
David Woodhouse | 1e28a7d | 2005-11-17 00:44:03 +0000 | [diff] [blame] | 147 | extern int eeh_subsystem_enabled; |
Gavin Shan | 646a849 | 2012-09-07 22:44:06 +0000 | [diff] [blame] | 148 | extern struct mutex eeh_mutex; |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 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 | } |
Gavin Shan | 646a849 | 2012-09-07 22:44:06 +0000 | [diff] [blame] | 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 | } |
David Woodhouse | 1e28a7d | 2005-11-17 00:44:03 +0000 | [diff] [blame] | 178 | |
Gavin Shan | cb3bc9d | 2012-02-27 20:03:51 +0000 | [diff] [blame] | 179 | /* |
| 180 | * Max number of EEH freezes allowed before we consider the device |
| 181 | * to be permanently disabled. |
| 182 | */ |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 183 | #define EEH_MAX_ALLOWED_FREEZES 5 |
| 184 | |
Gavin Shan | 22f4ab1 | 2012-09-07 22:44:08 +0000 | [diff] [blame] | 185 | typedef void *(*eeh_traverse_func)(void *data, void *flag); |
Gavin Shan | 55037d1 | 2012-09-07 22:44:07 +0000 | [diff] [blame] | 186 | int __devinit eeh_phb_pe_create(struct pci_controller *phb); |
Gavin Shan | 9b84348 | 2012-09-07 22:44:09 +0000 | [diff] [blame] | 187 | int eeh_add_to_parent_pe(struct eeh_dev *edev); |
Gavin Shan | 82e8882 | 2012-09-07 22:44:10 +0000 | [diff] [blame] | 188 | int eeh_rmv_from_parent_pe(struct eeh_dev *edev); |
Gavin Shan | 9e6d2cf | 2012-09-07 22:44:15 +0000 | [diff] [blame] | 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); |
Gavin Shan | 9b3c76f | 2012-09-07 22:44:19 +0000 | [diff] [blame] | 192 | struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe); |
Gavin Shan | 55037d1 | 2012-09-07 22:44:07 +0000 | [diff] [blame] | 193 | |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 194 | void * __devinit eeh_dev_init(struct device_node *dn, void *data); |
| 195 | void __devinit eeh_dev_phb_init_dynamic(struct pci_controller *phb); |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 196 | int __init eeh_ops_register(struct eeh_ops *ops); |
| 197 | int __exit eeh_ops_unregister(const char *name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | unsigned long eeh_check_failure(const volatile void __iomem *token, |
| 199 | unsigned long val); |
Gavin Shan | f8f7d63 | 2012-09-07 22:44:22 +0000 | [diff] [blame] | 200 | int eeh_dev_check_failure(struct eeh_dev *edev); |
Gavin Shan | 3ab96a0 | 2012-09-07 22:44:23 +0000 | [diff] [blame] | 201 | void __init eeh_addr_cache_build(void); |
Linas Vepstas | e2a296e | 2005-11-03 18:51:31 -0600 | [diff] [blame] | 202 | void eeh_add_device_tree_early(struct device_node *); |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 203 | void eeh_add_device_tree_late(struct pci_bus *); |
Linas Vepstas | e2a296e | 2005-11-03 18:51:31 -0600 | [diff] [blame] | 204 | void eeh_remove_bus_device(struct pci_dev *); |
| 205 | |
| 206 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
David Woodhouse | 1e28a7d | 2005-11-17 00:44:03 +0000 | [diff] [blame] | 212 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_subsystem_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val) |
| 231 | { |
| 232 | return val; |
| 233 | } |
| 234 | |
Gavin Shan | f8f7d63 | 2012-09-07 22:44:22 +0000 | [diff] [blame] | 235 | #define eeh_dev_check_failure(x) (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Gavin Shan | 3ab96a0 | 2012-09-07 22:44:23 +0000 | [diff] [blame] | 237 | static inline void eeh_addr_cache_build(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Haren Myneni | 022930e | 2005-12-27 18:58:29 -0800 | [diff] [blame] | 239 | static inline void eeh_add_device_tree_early(struct device_node *dn) { } |
| 240 | |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 241 | static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } |
| 242 | |
Haren Myneni | 022930e | 2005-12-27 18:58:29 -0800 | [diff] [blame] | 243 | static inline void eeh_remove_bus_device(struct pci_dev *dev) { } |
Gavin Shan | 646a849 | 2012-09-07 22:44:06 +0000 | [diff] [blame] | 244 | |
| 245 | static inline void eeh_lock(void) { } |
| 246 | static inline void eeh_unlock(void) { } |
| 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
| 249 | #define EEH_IO_ERROR_VALUE(size) (-1UL) |
| 250 | #endif /* CONFIG_EEH */ |
| 251 | |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 252 | #ifdef CONFIG_PPC64 |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 253 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
| 280 | static inline u64 eeh_readq(const volatile void __iomem *addr) |
| 281 | { |
| 282 | u64 val = in_le64(addr); |
| 283 | if (EEH_POSSIBLE_ERROR(val, u64)) |
| 284 | return eeh_check_failure(addr, val); |
| 285 | return val; |
| 286 | } |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 287 | |
| 288 | static inline u16 eeh_readw_be(const volatile void __iomem *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 290 | u16 val = in_be16(addr); |
| 291 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 292 | return eeh_check_failure(addr, val); |
| 293 | return val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 295 | |
| 296 | static inline u32 eeh_readl_be(const volatile void __iomem *addr) |
| 297 | { |
| 298 | u32 val = in_be32(addr); |
| 299 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 300 | return eeh_check_failure(addr, val); |
| 301 | return val; |
| 302 | } |
| 303 | |
| 304 | static inline u64 eeh_readq_be(const volatile void __iomem *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 312 | static inline void eeh_memcpy_fromio(void *dest, const |
| 313 | volatile void __iomem *src, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | unsigned long n) |
| 315 | { |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 316 | _memcpy_fromio(dest, src, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
| 318 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes |
| 319 | * were copied. Check all four bytes. |
| 320 | */ |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 321 | if (n >= 4 && EEH_POSSIBLE_ERROR(*((u32 *)(dest + n - 4)), u32)) |
| 322 | eeh_check_failure(src, *((u32 *)(dest + n - 4))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | } |
| 324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | /* in-string eeh macros */ |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 326 | static inline void eeh_readsb(const volatile void __iomem *addr, void * buf, |
| 327 | int ns) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 329 | _insb(addr, buf, ns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 331 | eeh_check_failure(addr, *(u8*)buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } |
| 333 | |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 334 | static inline void eeh_readsw(const volatile void __iomem *addr, void * buf, |
| 335 | int ns) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 337 | _insw(addr, buf, ns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 339 | eeh_check_failure(addr, *(u16*)buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | } |
| 341 | |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 342 | static inline void eeh_readsl(const volatile void __iomem *addr, void * buf, |
| 343 | int nl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 345 | _insl(addr, buf, nl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 347 | eeh_check_failure(addr, *(u32*)buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 350 | #endif /* CONFIG_PPC64 */ |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 351 | #endif /* __KERNEL__ */ |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 352 | #endif /* _POWERPC_EEH_H */ |