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 | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 35 | * The struct is used to trace EEH state for the associated |
| 36 | * PCI device node or PCI device. In future, it might |
| 37 | * represent PE as well so that the EEH device to form |
| 38 | * another tree except the currently existing tree of PCI |
| 39 | * buses and PCI devices |
| 40 | */ |
| 41 | #define EEH_MODE_SUPPORTED (1<<0) /* EEH supported on the device */ |
| 42 | #define EEH_MODE_NOCHECK (1<<1) /* EEH check should be skipped */ |
| 43 | #define EEH_MODE_ISOLATED (1<<2) /* The device has been isolated */ |
| 44 | #define EEH_MODE_RECOVERING (1<<3) /* Recovering the device */ |
| 45 | #define EEH_MODE_IRQ_DISABLED (1<<4) /* Interrupt disabled */ |
| 46 | |
| 47 | struct eeh_dev { |
| 48 | int mode; /* EEH mode */ |
| 49 | int class_code; /* Class code of the device */ |
| 50 | int config_addr; /* Config address */ |
| 51 | int pe_config_addr; /* PE config address */ |
| 52 | int check_count; /* Times of ignored error */ |
| 53 | int freeze_count; /* Times of froze up */ |
| 54 | int false_positives; /* Times of reported #ff's */ |
| 55 | u32 config_space[16]; /* Saved PCI config space */ |
| 56 | struct pci_controller *phb; /* Associated PHB */ |
| 57 | struct device_node *dn; /* Associated device node */ |
| 58 | struct pci_dev *pdev; /* Associated PCI device */ |
| 59 | }; |
| 60 | |
| 61 | static inline struct device_node *eeh_dev_to_of_node(struct eeh_dev *edev) |
| 62 | { |
| 63 | return edev->dn; |
| 64 | } |
| 65 | |
| 66 | static inline struct pci_dev *eeh_dev_to_pci_dev(struct eeh_dev *edev) |
| 67 | { |
| 68 | return edev->pdev; |
| 69 | } |
| 70 | |
| 71 | /* |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 72 | * The struct is used to trace the registered EEH operation |
| 73 | * callback functions. Actually, those operation callback |
| 74 | * functions are heavily platform dependent. That means the |
| 75 | * platform should register its own EEH operation callback |
| 76 | * functions before any EEH further operations. |
| 77 | */ |
Gavin Shan | 8fb8f70 | 2012-02-27 20:03:55 +0000 | [diff] [blame] | 78 | #define EEH_OPT_DISABLE 0 /* EEH disable */ |
| 79 | #define EEH_OPT_ENABLE 1 /* EEH enable */ |
| 80 | #define EEH_OPT_THAW_MMIO 2 /* MMIO enable */ |
| 81 | #define EEH_OPT_THAW_DMA 3 /* DMA enable */ |
Gavin Shan | eb594a4 | 2012-02-27 20:03:57 +0000 | [diff] [blame] | 82 | #define EEH_STATE_UNAVAILABLE (1 << 0) /* State unavailable */ |
| 83 | #define EEH_STATE_NOT_SUPPORT (1 << 1) /* EEH not supported */ |
| 84 | #define EEH_STATE_RESET_ACTIVE (1 << 2) /* Active reset */ |
| 85 | #define EEH_STATE_MMIO_ACTIVE (1 << 3) /* Active MMIO */ |
| 86 | #define EEH_STATE_DMA_ACTIVE (1 << 4) /* Active DMA */ |
| 87 | #define EEH_STATE_MMIO_ENABLED (1 << 5) /* MMIO enabled */ |
| 88 | #define EEH_STATE_DMA_ENABLED (1 << 6) /* DMA enabled */ |
Gavin Shan | 2652481 | 2012-02-27 20:03:59 +0000 | [diff] [blame] | 89 | #define EEH_RESET_DEACTIVATE 0 /* Deactivate the PE reset */ |
| 90 | #define EEH_RESET_HOT 1 /* Hot reset */ |
| 91 | #define EEH_RESET_FUNDAMENTAL 3 /* Fundamental reset */ |
Gavin Shan | 8d63329 | 2012-02-27 20:04:00 +0000 | [diff] [blame] | 92 | #define EEH_LOG_TEMP 1 /* EEH temporary error log */ |
| 93 | #define EEH_LOG_PERM 2 /* EEH permanent error log */ |
Gavin Shan | eb594a4 | 2012-02-27 20:03:57 +0000 | [diff] [blame] | 94 | |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 95 | struct eeh_ops { |
| 96 | char *name; |
| 97 | int (*init)(void); |
| 98 | int (*set_option)(struct device_node *dn, int option); |
| 99 | int (*get_pe_addr)(struct device_node *dn); |
| 100 | int (*get_state)(struct device_node *dn, int *state); |
| 101 | int (*reset)(struct device_node *dn, int option); |
| 102 | int (*wait_state)(struct device_node *dn, int max_wait); |
| 103 | int (*get_log)(struct device_node *dn, int severity, char *drv_log, unsigned long len); |
| 104 | int (*configure_bridge)(struct device_node *dn); |
Gavin Shan | 3780444 | 2012-02-27 20:04:11 +0000 | [diff] [blame] | 105 | int (*read_config)(struct device_node *dn, int where, int size, u32 *val); |
| 106 | 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] | 107 | }; |
| 108 | |
| 109 | extern struct eeh_ops *eeh_ops; |
David Woodhouse | 1e28a7d | 2005-11-17 00:44:03 +0000 | [diff] [blame] | 110 | extern int eeh_subsystem_enabled; |
| 111 | |
Gavin Shan | cb3bc9d | 2012-02-27 20:03:51 +0000 | [diff] [blame] | 112 | /* |
| 113 | * Max number of EEH freezes allowed before we consider the device |
| 114 | * to be permanently disabled. |
| 115 | */ |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 116 | #define EEH_MAX_ALLOWED_FREEZES 5 |
| 117 | |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 118 | void * __devinit eeh_dev_init(struct device_node *dn, void *data); |
| 119 | void __devinit eeh_dev_phb_init_dynamic(struct pci_controller *phb); |
| 120 | void __init eeh_dev_phb_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | void __init eeh_init(void); |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 122 | #ifdef CONFIG_PPC_PSERIES |
| 123 | int __init eeh_pseries_init(void); |
| 124 | #endif |
| 125 | int __init eeh_ops_register(struct eeh_ops *ops); |
| 126 | int __exit eeh_ops_unregister(const char *name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | unsigned long eeh_check_failure(const volatile void __iomem *token, |
| 128 | unsigned long val); |
| 129 | int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev); |
| 130 | void __init pci_addr_cache_build(void); |
Linas Vepstas | e2a296e | 2005-11-03 18:51:31 -0600 | [diff] [blame] | 131 | void eeh_add_device_tree_early(struct device_node *); |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 132 | void eeh_add_device_tree_late(struct pci_bus *); |
Linas Vepstas | e2a296e | 2005-11-03 18:51:31 -0600 | [diff] [blame] | 133 | void eeh_remove_bus_device(struct pci_dev *); |
| 134 | |
| 135 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. |
| 137 | * |
| 138 | * If this macro yields TRUE, the caller relays to eeh_check_failure() |
| 139 | * which does further tests out of line. |
| 140 | */ |
David Woodhouse | 1e28a7d | 2005-11-17 00:44:03 +0000 | [diff] [blame] | 141 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_subsystem_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | /* |
| 144 | * Reads from a device which has been isolated by EEH will return |
| 145 | * all 1s. This macro gives an all-1s value of the given size (in |
| 146 | * bytes: 1, 2, or 4) for comparing with the result of a read. |
| 147 | */ |
| 148 | #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8)) |
| 149 | |
| 150 | #else /* !CONFIG_EEH */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 151 | |
| 152 | static inline void *eeh_dev_init(struct device_node *dn, void *data) |
| 153 | { |
| 154 | return NULL; |
| 155 | } |
| 156 | |
| 157 | static inline void eeh_dev_phb_init_dynamic(struct pci_controller *phb) { } |
| 158 | |
| 159 | static inline void eeh_dev_phb_init(void) { } |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | static inline void eeh_init(void) { } |
| 162 | |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 163 | #ifdef CONFIG_PPC_PSERIES |
| 164 | static inline int eeh_pseries_init(void) |
| 165 | { |
| 166 | return 0; |
| 167 | } |
| 168 | #endif /* CONFIG_PPC_PSERIES */ |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val) |
| 171 | { |
| 172 | return val; |
| 173 | } |
| 174 | |
| 175 | static inline int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) |
| 176 | { |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | static inline void pci_addr_cache_build(void) { } |
| 181 | |
Haren Myneni | 022930e | 2005-12-27 18:58:29 -0800 | [diff] [blame] | 182 | static inline void eeh_add_device_tree_early(struct device_node *dn) { } |
| 183 | |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 184 | static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } |
| 185 | |
Haren Myneni | 022930e | 2005-12-27 18:58:29 -0800 | [diff] [blame] | 186 | static inline void eeh_remove_bus_device(struct pci_dev *dev) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
| 188 | #define EEH_IO_ERROR_VALUE(size) (-1UL) |
| 189 | #endif /* CONFIG_EEH */ |
| 190 | |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 191 | #ifdef CONFIG_PPC64 |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 192 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | * MMIO read/write operations with EEH support. |
| 194 | */ |
| 195 | static inline u8 eeh_readb(const volatile void __iomem *addr) |
| 196 | { |
| 197 | u8 val = in_8(addr); |
| 198 | if (EEH_POSSIBLE_ERROR(val, u8)) |
| 199 | return eeh_check_failure(addr, val); |
| 200 | return val; |
| 201 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
| 203 | static inline u16 eeh_readw(const volatile void __iomem *addr) |
| 204 | { |
| 205 | u16 val = in_le16(addr); |
| 206 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 207 | return eeh_check_failure(addr, val); |
| 208 | return val; |
| 209 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | static inline u32 eeh_readl(const volatile void __iomem *addr) |
| 212 | { |
| 213 | u32 val = in_le32(addr); |
| 214 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 215 | return eeh_check_failure(addr, val); |
| 216 | return val; |
| 217 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
| 219 | static inline u64 eeh_readq(const volatile void __iomem *addr) |
| 220 | { |
| 221 | u64 val = in_le64(addr); |
| 222 | if (EEH_POSSIBLE_ERROR(val, u64)) |
| 223 | return eeh_check_failure(addr, val); |
| 224 | return val; |
| 225 | } |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 226 | |
| 227 | static inline u16 eeh_readw_be(const volatile void __iomem *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 229 | u16 val = in_be16(addr); |
| 230 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 231 | return eeh_check_failure(addr, val); |
| 232 | return val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 234 | |
| 235 | static inline u32 eeh_readl_be(const volatile void __iomem *addr) |
| 236 | { |
| 237 | u32 val = in_be32(addr); |
| 238 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 239 | return eeh_check_failure(addr, val); |
| 240 | return val; |
| 241 | } |
| 242 | |
| 243 | static inline u64 eeh_readq_be(const volatile void __iomem *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
| 245 | u64 val = in_be64(addr); |
| 246 | if (EEH_POSSIBLE_ERROR(val, u64)) |
| 247 | return eeh_check_failure(addr, val); |
| 248 | return val; |
| 249 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 251 | static inline void eeh_memcpy_fromio(void *dest, const |
| 252 | volatile void __iomem *src, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | unsigned long n) |
| 254 | { |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 255 | _memcpy_fromio(dest, src, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
| 257 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes |
| 258 | * were copied. Check all four bytes. |
| 259 | */ |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 260 | if (n >= 4 && EEH_POSSIBLE_ERROR(*((u32 *)(dest + n - 4)), u32)) |
| 261 | eeh_check_failure(src, *((u32 *)(dest + n - 4))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | } |
| 263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | /* in-string eeh macros */ |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 265 | static inline void eeh_readsb(const volatile void __iomem *addr, void * buf, |
| 266 | int ns) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 268 | _insb(addr, buf, ns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 270 | eeh_check_failure(addr, *(u8*)buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
| 272 | |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 273 | static inline void eeh_readsw(const volatile void __iomem *addr, void * buf, |
| 274 | int ns) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 276 | _insw(addr, buf, ns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 278 | eeh_check_failure(addr, *(u16*)buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 281 | static inline void eeh_readsl(const volatile void __iomem *addr, void * buf, |
| 282 | int nl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 284 | _insl(addr, buf, nl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 286 | eeh_check_failure(addr, *(u32*)buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 289 | #endif /* CONFIG_PPC64 */ |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 290 | #endif /* __KERNEL__ */ |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 291 | #endif /* _POWERPC_EEH_H */ |