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 | * 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. |
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 | |
| 20 | #ifndef _PPC64_EEH_H |
| 21 | #define _PPC64_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 | |
| 24 | #include <linux/config.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/list.h> |
| 27 | #include <linux/string.h> |
| 28 | |
| 29 | struct pci_dev; |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 30 | struct pci_bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | struct device_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | #ifdef CONFIG_EEH |
| 34 | |
David Woodhouse | 1e28a7d | 2005-11-17 00:44:03 +0000 | [diff] [blame] | 35 | extern int eeh_subsystem_enabled; |
| 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | /* Values for eeh_mode bits in device_node */ |
Linas Vepstas | 77bd741 | 2005-11-03 18:52:49 -0600 | [diff] [blame] | 38 | #define EEH_MODE_SUPPORTED (1<<0) |
| 39 | #define EEH_MODE_NOCHECK (1<<1) |
| 40 | #define EEH_MODE_ISOLATED (1<<2) |
| 41 | #define EEH_MODE_RECOVERING (1<<3) |
| 42 | #define EEH_MODE_IRQ_DISABLED (1<<4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 44 | /* Max number of EEH freezes allowed before we consider the device |
| 45 | * to be permanently disabled. */ |
| 46 | #define EEH_MAX_ALLOWED_FREEZES 5 |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | void __init eeh_init(void); |
| 49 | unsigned long eeh_check_failure(const volatile void __iomem *token, |
| 50 | unsigned long val); |
| 51 | int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev); |
| 52 | void __init pci_addr_cache_build(void); |
| 53 | |
| 54 | /** |
| 55 | * eeh_add_device_early |
| 56 | * eeh_add_device_late |
| 57 | * |
| 58 | * Perform eeh initialization for devices added after boot. |
| 59 | * Call eeh_add_device_early before doing any i/o to the |
| 60 | * device (including config space i/o). Call eeh_add_device_late |
| 61 | * to finish the eeh setup for this device. |
| 62 | */ |
| 63 | void eeh_add_device_early(struct device_node *); |
Greg KH | e5cef95 | 2006-03-01 13:46:00 -0800 | [diff] [blame] | 64 | void eeh_add_device_late(struct pci_dev *dev); |
Linas Vepstas | e2a296e | 2005-11-03 18:51:31 -0600 | [diff] [blame] | 65 | void eeh_add_device_tree_early(struct device_node *); |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 66 | void eeh_add_device_tree_late(struct pci_bus *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
| 68 | /** |
| 69 | * eeh_remove_device - undo EEH setup for the indicated pci device |
| 70 | * @dev: pci device to be removed |
| 71 | * |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 72 | * This routine should be called when a device is removed from |
| 73 | * a running system (e.g. by hotplug or dlpar). It unregisters |
| 74 | * the PCI device from the EEH subsystem. I/O errors affecting |
| 75 | * this device will no longer be detected after this call; thus, |
| 76 | * i/o errors affecting this slot may leave this device unusable. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | */ |
| 78 | void eeh_remove_device(struct pci_dev *); |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | /** |
Linas Vepstas | e2a296e | 2005-11-03 18:51:31 -0600 | [diff] [blame] | 81 | * eeh_remove_device_recursive - undo EEH for device & children. |
| 82 | * @dev: pci device to be removed |
| 83 | * |
| 84 | * As above, this removes the device; it also removes child |
| 85 | * pci devices as well. |
| 86 | */ |
| 87 | void eeh_remove_bus_device(struct pci_dev *); |
| 88 | |
| 89 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. |
| 91 | * |
| 92 | * If this macro yields TRUE, the caller relays to eeh_check_failure() |
| 93 | * which does further tests out of line. |
| 94 | */ |
David Woodhouse | 1e28a7d | 2005-11-17 00:44:03 +0000 | [diff] [blame] | 95 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_subsystem_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | /* |
| 98 | * Reads from a device which has been isolated by EEH will return |
| 99 | * all 1s. This macro gives an all-1s value of the given size (in |
| 100 | * bytes: 1, 2, or 4) for comparing with the result of a read. |
| 101 | */ |
| 102 | #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8)) |
| 103 | |
| 104 | #else /* !CONFIG_EEH */ |
| 105 | static inline void eeh_init(void) { } |
| 106 | |
| 107 | static inline unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val) |
| 108 | { |
| 109 | return val; |
| 110 | } |
| 111 | |
| 112 | static inline int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) |
| 113 | { |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static inline void pci_addr_cache_build(void) { } |
| 118 | |
| 119 | static inline void eeh_add_device_early(struct device_node *dn) { } |
| 120 | |
Mark Fasheh | 1c6cc5f | 2006-03-07 21:55:20 -0800 | [diff] [blame] | 121 | static inline void eeh_add_device_late(struct pci_dev *dev) { } |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | static inline void eeh_remove_device(struct pci_dev *dev) { } |
| 124 | |
Haren Myneni | 022930e | 2005-12-27 18:58:29 -0800 | [diff] [blame] | 125 | static inline void eeh_add_device_tree_early(struct device_node *dn) { } |
| 126 | |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 127 | static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } |
| 128 | |
Haren Myneni | 022930e | 2005-12-27 18:58:29 -0800 | [diff] [blame] | 129 | static inline void eeh_remove_bus_device(struct pci_dev *dev) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
| 131 | #define EEH_IO_ERROR_VALUE(size) (-1UL) |
| 132 | #endif /* CONFIG_EEH */ |
| 133 | |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 134 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | * MMIO read/write operations with EEH support. |
| 136 | */ |
| 137 | static inline u8 eeh_readb(const volatile void __iomem *addr) |
| 138 | { |
| 139 | u8 val = in_8(addr); |
| 140 | if (EEH_POSSIBLE_ERROR(val, u8)) |
| 141 | return eeh_check_failure(addr, val); |
| 142 | return val; |
| 143 | } |
| 144 | static inline void eeh_writeb(u8 val, volatile void __iomem *addr) |
| 145 | { |
| 146 | out_8(addr, val); |
| 147 | } |
| 148 | |
| 149 | static inline u16 eeh_readw(const volatile void __iomem *addr) |
| 150 | { |
| 151 | u16 val = in_le16(addr); |
| 152 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 153 | return eeh_check_failure(addr, val); |
| 154 | return val; |
| 155 | } |
| 156 | static inline void eeh_writew(u16 val, volatile void __iomem *addr) |
| 157 | { |
| 158 | out_le16(addr, val); |
| 159 | } |
| 160 | static inline u16 eeh_raw_readw(const volatile void __iomem *addr) |
| 161 | { |
| 162 | u16 val = in_be16(addr); |
| 163 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 164 | return eeh_check_failure(addr, val); |
| 165 | return val; |
| 166 | } |
| 167 | static inline void eeh_raw_writew(u16 val, volatile void __iomem *addr) { |
| 168 | volatile u16 __iomem *vaddr = (volatile u16 __iomem *) addr; |
| 169 | out_be16(vaddr, val); |
| 170 | } |
| 171 | |
| 172 | static inline u32 eeh_readl(const volatile void __iomem *addr) |
| 173 | { |
| 174 | u32 val = in_le32(addr); |
| 175 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 176 | return eeh_check_failure(addr, val); |
| 177 | return val; |
| 178 | } |
| 179 | static inline void eeh_writel(u32 val, volatile void __iomem *addr) |
| 180 | { |
| 181 | out_le32(addr, val); |
| 182 | } |
| 183 | static inline u32 eeh_raw_readl(const volatile void __iomem *addr) |
| 184 | { |
| 185 | u32 val = in_be32(addr); |
| 186 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 187 | return eeh_check_failure(addr, val); |
| 188 | return val; |
| 189 | } |
| 190 | static inline void eeh_raw_writel(u32 val, volatile void __iomem *addr) |
| 191 | { |
| 192 | out_be32(addr, val); |
| 193 | } |
| 194 | |
| 195 | static inline u64 eeh_readq(const volatile void __iomem *addr) |
| 196 | { |
| 197 | u64 val = in_le64(addr); |
| 198 | if (EEH_POSSIBLE_ERROR(val, u64)) |
| 199 | return eeh_check_failure(addr, val); |
| 200 | return val; |
| 201 | } |
| 202 | static inline void eeh_writeq(u64 val, volatile void __iomem *addr) |
| 203 | { |
| 204 | out_le64(addr, val); |
| 205 | } |
| 206 | static inline u64 eeh_raw_readq(const volatile void __iomem *addr) |
| 207 | { |
| 208 | u64 val = in_be64(addr); |
| 209 | if (EEH_POSSIBLE_ERROR(val, u64)) |
| 210 | return eeh_check_failure(addr, val); |
| 211 | return val; |
| 212 | } |
| 213 | static inline void eeh_raw_writeq(u64 val, volatile void __iomem *addr) |
| 214 | { |
| 215 | out_be64(addr, val); |
| 216 | } |
| 217 | |
| 218 | #define EEH_CHECK_ALIGN(v,a) \ |
| 219 | ((((unsigned long)(v)) & ((a) - 1)) == 0) |
| 220 | |
| 221 | static inline void eeh_memset_io(volatile void __iomem *addr, int c, |
| 222 | unsigned long n) |
| 223 | { |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 224 | void *p = (void __force *)addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | u32 lc = c; |
| 226 | lc |= lc << 8; |
| 227 | lc |= lc << 16; |
| 228 | |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 229 | while(n && !EEH_CHECK_ALIGN(p, 4)) { |
| 230 | *((volatile u8 *)p) = c; |
| 231 | p++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | n--; |
| 233 | } |
| 234 | while(n >= 4) { |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 235 | *((volatile u32 *)p) = lc; |
| 236 | p += 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | n -= 4; |
| 238 | } |
| 239 | while(n) { |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 240 | *((volatile u8 *)p) = c; |
| 241 | p++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | n--; |
| 243 | } |
| 244 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 245 | } |
| 246 | static inline void eeh_memcpy_fromio(void *dest, const volatile void __iomem *src, |
| 247 | unsigned long n) |
| 248 | { |
| 249 | void *vsrc = (void __force *) src; |
| 250 | void *destsave = dest; |
| 251 | unsigned long nsave = n; |
| 252 | |
| 253 | while(n && (!EEH_CHECK_ALIGN(vsrc, 4) || !EEH_CHECK_ALIGN(dest, 4))) { |
| 254 | *((u8 *)dest) = *((volatile u8 *)vsrc); |
| 255 | __asm__ __volatile__ ("eieio" : : : "memory"); |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 256 | vsrc++; |
| 257 | dest++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | n--; |
| 259 | } |
| 260 | while(n > 4) { |
| 261 | *((u32 *)dest) = *((volatile u32 *)vsrc); |
| 262 | __asm__ __volatile__ ("eieio" : : : "memory"); |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 263 | vsrc += 4; |
| 264 | dest += 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | n -= 4; |
| 266 | } |
| 267 | while(n) { |
| 268 | *((u8 *)dest) = *((volatile u8 *)vsrc); |
| 269 | __asm__ __volatile__ ("eieio" : : : "memory"); |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 270 | vsrc++; |
| 271 | dest++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | n--; |
| 273 | } |
| 274 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 275 | |
| 276 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes |
| 277 | * were copied. Check all four bytes. |
| 278 | */ |
| 279 | if ((nsave >= 4) && |
| 280 | (EEH_POSSIBLE_ERROR((*((u32 *) destsave+nsave-4)), u32))) { |
| 281 | eeh_check_failure(src, (*((u32 *) destsave+nsave-4))); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | static inline void eeh_memcpy_toio(volatile void __iomem *dest, const void *src, |
| 286 | unsigned long n) |
| 287 | { |
| 288 | void *vdest = (void __force *) dest; |
| 289 | |
| 290 | while(n && (!EEH_CHECK_ALIGN(vdest, 4) || !EEH_CHECK_ALIGN(src, 4))) { |
| 291 | *((volatile u8 *)vdest) = *((u8 *)src); |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 292 | src++; |
| 293 | vdest++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | n--; |
| 295 | } |
| 296 | while(n > 4) { |
| 297 | *((volatile u32 *)vdest) = *((volatile u32 *)src); |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 298 | src += 4; |
| 299 | vdest += 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | n-=4; |
| 301 | } |
| 302 | while(n) { |
| 303 | *((volatile u8 *)vdest) = *((u8 *)src); |
viro@ZenIV.linux.org.uk | 6c9afc65 | 2005-09-09 16:50:43 +0100 | [diff] [blame] | 304 | src++; |
| 305 | vdest++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | n--; |
| 307 | } |
| 308 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 309 | } |
| 310 | |
| 311 | #undef EEH_CHECK_ALIGN |
| 312 | |
| 313 | static inline u8 eeh_inb(unsigned long port) |
| 314 | { |
| 315 | u8 val; |
| 316 | if (!_IO_IS_VALID(port)) |
| 317 | return ~0; |
| 318 | val = in_8((u8 __iomem *)(port+pci_io_base)); |
| 319 | if (EEH_POSSIBLE_ERROR(val, u8)) |
| 320 | return eeh_check_failure((void __iomem *)(port), val); |
| 321 | return val; |
| 322 | } |
| 323 | |
| 324 | static inline void eeh_outb(u8 val, unsigned long port) |
| 325 | { |
| 326 | if (_IO_IS_VALID(port)) |
| 327 | out_8((u8 __iomem *)(port+pci_io_base), val); |
| 328 | } |
| 329 | |
| 330 | static inline u16 eeh_inw(unsigned long port) |
| 331 | { |
| 332 | u16 val; |
| 333 | if (!_IO_IS_VALID(port)) |
| 334 | return ~0; |
| 335 | val = in_le16((u16 __iomem *)(port+pci_io_base)); |
| 336 | if (EEH_POSSIBLE_ERROR(val, u16)) |
| 337 | return eeh_check_failure((void __iomem *)(port), val); |
| 338 | return val; |
| 339 | } |
| 340 | |
| 341 | static inline void eeh_outw(u16 val, unsigned long port) |
| 342 | { |
| 343 | if (_IO_IS_VALID(port)) |
| 344 | out_le16((u16 __iomem *)(port+pci_io_base), val); |
| 345 | } |
| 346 | |
| 347 | static inline u32 eeh_inl(unsigned long port) |
| 348 | { |
| 349 | u32 val; |
| 350 | if (!_IO_IS_VALID(port)) |
| 351 | return ~0; |
| 352 | val = in_le32((u32 __iomem *)(port+pci_io_base)); |
| 353 | if (EEH_POSSIBLE_ERROR(val, u32)) |
| 354 | return eeh_check_failure((void __iomem *)(port), val); |
| 355 | return val; |
| 356 | } |
| 357 | |
| 358 | static inline void eeh_outl(u32 val, unsigned long port) |
| 359 | { |
| 360 | if (_IO_IS_VALID(port)) |
| 361 | out_le32((u32 __iomem *)(port+pci_io_base), val); |
| 362 | } |
| 363 | |
| 364 | /* in-string eeh macros */ |
| 365 | static inline void eeh_insb(unsigned long port, void * buf, int ns) |
| 366 | { |
| 367 | _insb((u8 __iomem *)(port+pci_io_base), buf, ns); |
| 368 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) |
| 369 | eeh_check_failure((void __iomem *)(port), *(u8*)buf); |
| 370 | } |
| 371 | |
| 372 | static inline void eeh_insw_ns(unsigned long port, void * buf, int ns) |
| 373 | { |
| 374 | _insw_ns((u16 __iomem *)(port+pci_io_base), buf, ns); |
| 375 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) |
| 376 | eeh_check_failure((void __iomem *)(port), *(u16*)buf); |
| 377 | } |
| 378 | |
| 379 | static inline void eeh_insl_ns(unsigned long port, void * buf, int nl) |
| 380 | { |
| 381 | _insl_ns((u32 __iomem *)(port+pci_io_base), buf, nl); |
| 382 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) |
| 383 | eeh_check_failure((void __iomem *)(port), *(u32*)buf); |
| 384 | } |
| 385 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 386 | #endif /* __KERNEL__ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | #endif /* _PPC64_EEH_H */ |