Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * eeh.h |
| 3 | * Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation. |
| 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. |
| 9 | * |
| 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. |
| 14 | * |
| 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 | |
| 20 | #ifndef _PPC64_EEH_H |
| 21 | #define _PPC64_EEH_H |
| 22 | |
| 23 | #include <linux/config.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/list.h> |
| 26 | #include <linux/string.h> |
| 27 | |
| 28 | struct pci_dev; |
| 29 | struct device_node; |
| 30 | struct device_node; |
| 31 | struct notifier_block; |
| 32 | |
| 33 | #ifdef CONFIG_EEH |
| 34 | |
| 35 | /* Values for eeh_mode bits in device_node */ |
| 36 | #define EEH_MODE_SUPPORTED (1<<0) |
| 37 | #define EEH_MODE_NOCHECK (1<<1) |
| 38 | #define EEH_MODE_ISOLATED (1<<2) |
| 39 | |
| 40 | void __init eeh_init(void); |
| 41 | unsigned long eeh_check_failure(const volatile void __iomem *token, |
| 42 | unsigned long val); |
| 43 | int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev); |
| 44 | void __init pci_addr_cache_build(void); |
| 45 | |
| 46 | /** |
| 47 | * eeh_add_device_early |
| 48 | * eeh_add_device_late |
| 49 | * |
| 50 | * Perform eeh initialization for devices added after boot. |
| 51 | * Call eeh_add_device_early before doing any i/o to the |
| 52 | * device (including config space i/o). Call eeh_add_device_late |
| 53 | * to finish the eeh setup for this device. |
| 54 | */ |
| 55 | void eeh_add_device_early(struct device_node *); |
| 56 | void eeh_add_device_late(struct pci_dev *); |
| 57 | |
| 58 | /** |
| 59 | * eeh_remove_device - undo EEH setup for the indicated pci device |
| 60 | * @dev: pci device to be removed |
| 61 | * |
| 62 | * This routine should be when a device is removed from a running |
| 63 | * system (e.g. by hotplug or dlpar). |
| 64 | */ |
| 65 | void eeh_remove_device(struct pci_dev *); |
| 66 | |
| 67 | #define EEH_DISABLE 0 |
| 68 | #define EEH_ENABLE 1 |
| 69 | #define EEH_RELEASE_LOADSTORE 2 |
| 70 | #define EEH_RELEASE_DMA 3 |
| 71 | |
| 72 | /** |
| 73 | * Notifier event flags. |
| 74 | */ |
| 75 | #define EEH_NOTIFY_FREEZE 1 |
| 76 | |
| 77 | /** EEH event -- structure holding pci slot data that describes |
| 78 | * a change in the isolation status of a PCI slot. A pointer |
| 79 | * to this struct is passed as the data pointer in a notify callback. |
| 80 | */ |
| 81 | struct eeh_event { |
| 82 | struct list_head list; |
| 83 | struct pci_dev *dev; |
| 84 | struct device_node *dn; |
| 85 | int reset_state; |
| 86 | }; |
| 87 | |
| 88 | /** Register to find out about EEH events. */ |
| 89 | int eeh_register_notifier(struct notifier_block *nb); |
| 90 | int eeh_unregister_notifier(struct notifier_block *nb); |
| 91 | |
| 92 | /** |
| 93 | * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. |
| 94 | * |
| 95 | * If this macro yields TRUE, the caller relays to eeh_check_failure() |
| 96 | * which does further tests out of line. |
| 97 | */ |
| 98 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0) |
| 99 | |
| 100 | /* |
| 101 | * Reads from a device which has been isolated by EEH will return |
| 102 | * all 1s. This macro gives an all-1s value of the given size (in |
| 103 | * bytes: 1, 2, or 4) for comparing with the result of a read. |
| 104 | */ |
| 105 | #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8)) |
| 106 | |
| 107 | #else /* !CONFIG_EEH */ |
| 108 | static inline void eeh_init(void) { } |
| 109 | |
| 110 | static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val) |
| 111 | { |
| 112 | return val; |
| 113 | } |
| 114 | |
| 115 | static inline int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) |
| 116 | { |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static inline void pci_addr_cache_build(void) { } |
| 121 | |
| 122 | static inline void eeh_add_device_early(struct device_node *dn) { } |
| 123 | |
| 124 | static inline void eeh_add_device_late(struct pci_dev *dev) { } |
| 125 | |
| 126 | static inline void eeh_remove_device(struct pci_dev *dev) { } |
| 127 | |
| 128 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
| 129 | #define EEH_IO_ERROR_VALUE(size) (-1UL) |
| 130 | #endif /* CONFIG_EEH */ |
| 131 | |
| 132 | /* |
| 133 | * MMIO read/write operations with EEH support. |
| 134 | */ |
| 135 | static inline u8 eeh_readb(const volatile void __iomem *addr) |
| 136 | { |
| 137 | u8 val = in_8(addr); |
| 138 | if (EEH_POSSIBLE_ERROR(val, u8)) |
| 139 | return eeh_check_failure(addr, val); |
| 140 | return val; |
| 141 | } |
| 142 | static inline void eeh_writeb(u8 val, volatile void __iomem *addr) |
| 143 | { |
| 144 | out_8(addr, val); |
| 145 | } |
| 146 | |
| 147 | static inline u16 eeh_readw(const volatile void __iomem *addr) |
| 148 | { |
| 149 | u16 val = in_le16(addr); |
| 150 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 151 | return eeh_check_failure(addr, val); |
| 152 | return val; |
| 153 | } |
| 154 | static inline void eeh_writew(u16 val, volatile void __iomem *addr) |
| 155 | { |
| 156 | out_le16(addr, val); |
| 157 | } |
| 158 | static inline u16 eeh_raw_readw(const volatile void __iomem *addr) |
| 159 | { |
| 160 | u16 val = in_be16(addr); |
| 161 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 162 | return eeh_check_failure(addr, val); |
| 163 | return val; |
| 164 | } |
| 165 | static inline void eeh_raw_writew(u16 val, volatile void __iomem *addr) { |
| 166 | volatile u16 __iomem *vaddr = (volatile u16 __iomem *) addr; |
| 167 | out_be16(vaddr, val); |
| 168 | } |
| 169 | |
| 170 | static inline u32 eeh_readl(const volatile void __iomem *addr) |
| 171 | { |
| 172 | u32 val = in_le32(addr); |
| 173 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 174 | return eeh_check_failure(addr, val); |
| 175 | return val; |
| 176 | } |
| 177 | static inline void eeh_writel(u32 val, volatile void __iomem *addr) |
| 178 | { |
| 179 | out_le32(addr, val); |
| 180 | } |
| 181 | static inline u32 eeh_raw_readl(const volatile void __iomem *addr) |
| 182 | { |
| 183 | u32 val = in_be32(addr); |
| 184 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 185 | return eeh_check_failure(addr, val); |
| 186 | return val; |
| 187 | } |
| 188 | static inline void eeh_raw_writel(u32 val, volatile void __iomem *addr) |
| 189 | { |
| 190 | out_be32(addr, val); |
| 191 | } |
| 192 | |
| 193 | static inline u64 eeh_readq(const volatile void __iomem *addr) |
| 194 | { |
| 195 | u64 val = in_le64(addr); |
| 196 | if (EEH_POSSIBLE_ERROR(val, u64)) |
| 197 | return eeh_check_failure(addr, val); |
| 198 | return val; |
| 199 | } |
| 200 | static inline void eeh_writeq(u64 val, volatile void __iomem *addr) |
| 201 | { |
| 202 | out_le64(addr, val); |
| 203 | } |
| 204 | static inline u64 eeh_raw_readq(const volatile void __iomem *addr) |
| 205 | { |
| 206 | u64 val = in_be64(addr); |
| 207 | if (EEH_POSSIBLE_ERROR(val, u64)) |
| 208 | return eeh_check_failure(addr, val); |
| 209 | return val; |
| 210 | } |
| 211 | static inline void eeh_raw_writeq(u64 val, volatile void __iomem *addr) |
| 212 | { |
| 213 | out_be64(addr, val); |
| 214 | } |
| 215 | |
| 216 | #define EEH_CHECK_ALIGN(v,a) \ |
| 217 | ((((unsigned long)(v)) & ((a) - 1)) == 0) |
| 218 | |
| 219 | static inline void eeh_memset_io(volatile void __iomem *addr, int c, |
| 220 | unsigned long n) |
| 221 | { |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 222 | void *p = (void __force *)addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | u32 lc = c; |
| 224 | lc |= lc << 8; |
| 225 | lc |= lc << 16; |
| 226 | |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 227 | while(n && !EEH_CHECK_ALIGN(p, 4)) { |
| 228 | *((volatile u8 *)p) = c; |
| 229 | p++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | n--; |
| 231 | } |
| 232 | while(n >= 4) { |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 233 | *((volatile u32 *)p) = lc; |
| 234 | p += 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | n -= 4; |
| 236 | } |
| 237 | while(n) { |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 238 | *((volatile u8 *)p) = c; |
| 239 | p++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | n--; |
| 241 | } |
| 242 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 243 | } |
| 244 | static inline void eeh_memcpy_fromio(void *dest, const volatile void __iomem *src, |
| 245 | unsigned long n) |
| 246 | { |
| 247 | void *vsrc = (void __force *) src; |
| 248 | void *destsave = dest; |
| 249 | unsigned long nsave = n; |
| 250 | |
| 251 | while(n && (!EEH_CHECK_ALIGN(vsrc, 4) || !EEH_CHECK_ALIGN(dest, 4))) { |
| 252 | *((u8 *)dest) = *((volatile u8 *)vsrc); |
| 253 | __asm__ __volatile__ ("eieio" : : : "memory"); |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 254 | vsrc++; |
| 255 | dest++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | n--; |
| 257 | } |
| 258 | while(n > 4) { |
| 259 | *((u32 *)dest) = *((volatile u32 *)vsrc); |
| 260 | __asm__ __volatile__ ("eieio" : : : "memory"); |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 261 | vsrc += 4; |
| 262 | dest += 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | n -= 4; |
| 264 | } |
| 265 | while(n) { |
| 266 | *((u8 *)dest) = *((volatile u8 *)vsrc); |
| 267 | __asm__ __volatile__ ("eieio" : : : "memory"); |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 268 | vsrc++; |
| 269 | dest++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | n--; |
| 271 | } |
| 272 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 273 | |
| 274 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes |
| 275 | * were copied. Check all four bytes. |
| 276 | */ |
| 277 | if ((nsave >= 4) && |
| 278 | (EEH_POSSIBLE_ERROR((*((u32 *) destsave+nsave-4)), u32))) { |
| 279 | eeh_check_failure(src, (*((u32 *) destsave+nsave-4))); |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | static inline void eeh_memcpy_toio(volatile void __iomem *dest, const void *src, |
| 284 | unsigned long n) |
| 285 | { |
| 286 | void *vdest = (void __force *) dest; |
| 287 | |
| 288 | while(n && (!EEH_CHECK_ALIGN(vdest, 4) || !EEH_CHECK_ALIGN(src, 4))) { |
| 289 | *((volatile u8 *)vdest) = *((u8 *)src); |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 290 | src++; |
| 291 | vdest++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | n--; |
| 293 | } |
| 294 | while(n > 4) { |
| 295 | *((volatile u32 *)vdest) = *((volatile u32 *)src); |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 296 | src += 4; |
| 297 | vdest += 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | n-=4; |
| 299 | } |
| 300 | while(n) { |
| 301 | *((volatile u8 *)vdest) = *((u8 *)src); |
viro@ZenIV.linux.org.uk | 6c9afc6 | 2005-09-09 16:50:43 +0100 | [diff] [blame^] | 302 | src++; |
| 303 | vdest++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | n--; |
| 305 | } |
| 306 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 307 | } |
| 308 | |
| 309 | #undef EEH_CHECK_ALIGN |
| 310 | |
| 311 | static inline u8 eeh_inb(unsigned long port) |
| 312 | { |
| 313 | u8 val; |
| 314 | if (!_IO_IS_VALID(port)) |
| 315 | return ~0; |
| 316 | val = in_8((u8 __iomem *)(port+pci_io_base)); |
| 317 | if (EEH_POSSIBLE_ERROR(val, u8)) |
| 318 | return eeh_check_failure((void __iomem *)(port), val); |
| 319 | return val; |
| 320 | } |
| 321 | |
| 322 | static inline void eeh_outb(u8 val, unsigned long port) |
| 323 | { |
| 324 | if (_IO_IS_VALID(port)) |
| 325 | out_8((u8 __iomem *)(port+pci_io_base), val); |
| 326 | } |
| 327 | |
| 328 | static inline u16 eeh_inw(unsigned long port) |
| 329 | { |
| 330 | u16 val; |
| 331 | if (!_IO_IS_VALID(port)) |
| 332 | return ~0; |
| 333 | val = in_le16((u16 __iomem *)(port+pci_io_base)); |
| 334 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 335 | return eeh_check_failure((void __iomem *)(port), val); |
| 336 | return val; |
| 337 | } |
| 338 | |
| 339 | static inline void eeh_outw(u16 val, unsigned long port) |
| 340 | { |
| 341 | if (_IO_IS_VALID(port)) |
| 342 | out_le16((u16 __iomem *)(port+pci_io_base), val); |
| 343 | } |
| 344 | |
| 345 | static inline u32 eeh_inl(unsigned long port) |
| 346 | { |
| 347 | u32 val; |
| 348 | if (!_IO_IS_VALID(port)) |
| 349 | return ~0; |
| 350 | val = in_le32((u32 __iomem *)(port+pci_io_base)); |
| 351 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 352 | return eeh_check_failure((void __iomem *)(port), val); |
| 353 | return val; |
| 354 | } |
| 355 | |
| 356 | static inline void eeh_outl(u32 val, unsigned long port) |
| 357 | { |
| 358 | if (_IO_IS_VALID(port)) |
| 359 | out_le32((u32 __iomem *)(port+pci_io_base), val); |
| 360 | } |
| 361 | |
| 362 | /* in-string eeh macros */ |
| 363 | static inline void eeh_insb(unsigned long port, void * buf, int ns) |
| 364 | { |
| 365 | _insb((u8 __iomem *)(port+pci_io_base), buf, ns); |
| 366 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) |
| 367 | eeh_check_failure((void __iomem *)(port), *(u8*)buf); |
| 368 | } |
| 369 | |
| 370 | static inline void eeh_insw_ns(unsigned long port, void * buf, int ns) |
| 371 | { |
| 372 | _insw_ns((u16 __iomem *)(port+pci_io_base), buf, ns); |
| 373 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) |
| 374 | eeh_check_failure((void __iomem *)(port), *(u16*)buf); |
| 375 | } |
| 376 | |
| 377 | static inline void eeh_insl_ns(unsigned long port, void * buf, int nl) |
| 378 | { |
| 379 | _insl_ns((u32 __iomem *)(port+pci_io_base), buf, nl); |
| 380 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) |
| 381 | eeh_check_failure((void __iomem *)(port), *(u32*)buf); |
| 382 | } |
| 383 | |
| 384 | #endif /* _PPC64_EEH_H */ |