Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 1 | /* |
| 2 | * HP WatchDog Driver |
| 3 | * based on |
| 4 | * |
| 5 | * SoftDog 0.05: A Software Watchdog Device |
| 6 | * |
| 7 | * (c) Copyright 2007 Hewlett-Packard Development Company, L.P. |
| 8 | * Thomas Mingarelli <thomas.mingarelli@hp.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * version 2 as published by the Free Software Foundation |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <linux/device.h> |
| 17 | #include <linux/fs.h> |
| 18 | #include <linux/init.h> |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 19 | #include <linux/io.h> |
dann frazier | a52e6d1 | 2010-07-27 17:50:50 -0600 | [diff] [blame] | 20 | #include <linux/bitops.h> |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 21 | #include <linux/kernel.h> |
| 22 | #include <linux/miscdevice.h> |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 23 | #include <linux/module.h> |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 24 | #include <linux/moduleparam.h> |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 25 | #include <linux/pci.h> |
| 26 | #include <linux/pci_ids.h> |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 27 | #include <linux/types.h> |
| 28 | #include <linux/uaccess.h> |
| 29 | #include <linux/watchdog.h> |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 30 | #ifdef CONFIG_HPWDT_NMI_DECODING |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 31 | #include <linux/dmi.h> |
dann frazier | a52e6d1 | 2010-07-27 17:50:50 -0600 | [diff] [blame] | 32 | #include <linux/spinlock.h> |
dann frazier | 923410d | 2010-07-27 17:50:54 -0600 | [diff] [blame] | 33 | #include <linux/nmi.h> |
| 34 | #include <linux/kdebug.h> |
| 35 | #include <linux/notifier.h> |
Bernhard Walle | 0602641 | 2008-11-14 15:47:03 +0100 | [diff] [blame] | 36 | #include <asm/cacheflush.h> |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 37 | #endif /* CONFIG_HPWDT_NMI_DECODING */ |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 38 | |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 39 | #define HPWDT_VERSION "1.2.0" |
dann frazier | e802e32 | 2010-06-02 16:23:39 -0600 | [diff] [blame] | 40 | #define SECS_TO_TICKS(secs) ((secs) * 1000 / 128) |
dann frazier | 6f681c2 | 2010-06-02 16:23:40 -0600 | [diff] [blame] | 41 | #define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000) |
| 42 | #define HPWDT_MAX_TIMER TICKS_TO_SECS(65535) |
dann frazier | 923410d | 2010-07-27 17:50:54 -0600 | [diff] [blame] | 43 | #define DEFAULT_MARGIN 30 |
| 44 | |
| 45 | static unsigned int soft_margin = DEFAULT_MARGIN; /* in seconds */ |
| 46 | static unsigned int reload; /* the computed soft_margin */ |
| 47 | static int nowayout = WATCHDOG_NOWAYOUT; |
| 48 | static char expect_release; |
| 49 | static unsigned long hpwdt_is_open; |
| 50 | |
| 51 | static void __iomem *pci_mem_addr; /* the PCI-memory address */ |
| 52 | static unsigned long __iomem *hpwdt_timer_reg; |
| 53 | static unsigned long __iomem *hpwdt_timer_con; |
| 54 | |
| 55 | static struct pci_device_id hpwdt_devices[] = { |
dann frazier | 36e3ff4 | 2010-07-27 17:50:57 -0600 | [diff] [blame] | 56 | { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB203) }, /* iLO2 */ |
| 57 | { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3306) }, /* iLO3 */ |
dann frazier | 923410d | 2010-07-27 17:50:54 -0600 | [diff] [blame] | 58 | {0}, /* terminate list */ |
| 59 | }; |
| 60 | MODULE_DEVICE_TABLE(pci, hpwdt_devices); |
| 61 | |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 62 | #ifdef CONFIG_HPWDT_NMI_DECODING |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 63 | #define PCI_BIOS32_SD_VALUE 0x5F32335F /* "_32_" */ |
| 64 | #define CRU_BIOS_SIGNATURE_VALUE 0x55524324 |
| 65 | #define PCI_BIOS32_PARAGRAPH_LEN 16 |
| 66 | #define PCI_ROM_BASE1 0x000F0000 |
| 67 | #define ROM_SIZE 0x10000 |
| 68 | |
| 69 | struct bios32_service_dir { |
| 70 | u32 signature; |
| 71 | u32 entry_point; |
| 72 | u8 revision; |
| 73 | u8 length; |
| 74 | u8 checksum; |
| 75 | u8 reserved[5]; |
| 76 | }; |
| 77 | |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 78 | /* type 212 */ |
| 79 | struct smbios_cru64_info { |
| 80 | u8 type; |
| 81 | u8 byte_length; |
| 82 | u16 handle; |
| 83 | u32 signature; |
| 84 | u64 physical_address; |
| 85 | u32 double_length; |
| 86 | u32 double_offset; |
| 87 | }; |
| 88 | #define SMBIOS_CRU64_INFORMATION 212 |
| 89 | |
| 90 | struct cmn_registers { |
| 91 | union { |
| 92 | struct { |
| 93 | u8 ral; |
| 94 | u8 rah; |
| 95 | u16 rea2; |
| 96 | }; |
| 97 | u32 reax; |
| 98 | } u1; |
| 99 | union { |
| 100 | struct { |
| 101 | u8 rbl; |
| 102 | u8 rbh; |
| 103 | u8 reb2l; |
| 104 | u8 reb2h; |
| 105 | }; |
| 106 | u32 rebx; |
| 107 | } u2; |
| 108 | union { |
| 109 | struct { |
| 110 | u8 rcl; |
| 111 | u8 rch; |
| 112 | u16 rec2; |
| 113 | }; |
| 114 | u32 recx; |
| 115 | } u3; |
| 116 | union { |
| 117 | struct { |
| 118 | u8 rdl; |
| 119 | u8 rdh; |
| 120 | u16 red2; |
| 121 | }; |
| 122 | u32 redx; |
| 123 | } u4; |
| 124 | |
| 125 | u32 resi; |
| 126 | u32 redi; |
| 127 | u16 rds; |
| 128 | u16 res; |
| 129 | u32 reflags; |
| 130 | } __attribute__((packed)); |
| 131 | |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 132 | static unsigned int hpwdt_nmi_decoding; |
dann frazier | 923410d | 2010-07-27 17:50:54 -0600 | [diff] [blame] | 133 | static unsigned int allow_kdump; |
Tom Mingarelli | 44df753 | 2009-06-18 23:28:57 +0000 | [diff] [blame] | 134 | static unsigned int priority; /* hpwdt at end of die_notify list */ |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 135 | static DEFINE_SPINLOCK(rom_lock); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 136 | static void *cru_rom_addr; |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 137 | static struct cmn_registers cmn_regs; |
| 138 | |
Wim Van Sebroeck | 143a2e5 | 2009-03-18 08:35:09 +0000 | [diff] [blame] | 139 | extern asmlinkage void asminline_call(struct cmn_registers *pi86Regs, |
| 140 | unsigned long *pRomEntry); |
Linus Torvalds | 1f6ef23 | 2008-06-20 12:19:28 -0700 | [diff] [blame] | 141 | |
dann frazier | 6b7f3d5 | 2010-07-27 17:50:59 -0600 | [diff] [blame] | 142 | #ifdef CONFIG_X86_32 |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 143 | /* --32 Bit Bios------------------------------------------------------------ */ |
| 144 | |
| 145 | #define HPWDT_ARCH 32 |
| 146 | |
Linus Torvalds | 1f6ef23 | 2008-06-20 12:19:28 -0700 | [diff] [blame] | 147 | asm(".text \n\t" |
| 148 | ".align 4 \n" |
| 149 | "asminline_call: \n\t" |
| 150 | "pushl %ebp \n\t" |
| 151 | "movl %esp, %ebp \n\t" |
| 152 | "pusha \n\t" |
| 153 | "pushf \n\t" |
| 154 | "push %es \n\t" |
| 155 | "push %ds \n\t" |
| 156 | "pop %es \n\t" |
| 157 | "movl 8(%ebp),%eax \n\t" |
| 158 | "movl 4(%eax),%ebx \n\t" |
| 159 | "movl 8(%eax),%ecx \n\t" |
| 160 | "movl 12(%eax),%edx \n\t" |
| 161 | "movl 16(%eax),%esi \n\t" |
| 162 | "movl 20(%eax),%edi \n\t" |
| 163 | "movl (%eax),%eax \n\t" |
| 164 | "push %cs \n\t" |
| 165 | "call *12(%ebp) \n\t" |
| 166 | "pushf \n\t" |
| 167 | "pushl %eax \n\t" |
| 168 | "movl 8(%ebp),%eax \n\t" |
| 169 | "movl %ebx,4(%eax) \n\t" |
| 170 | "movl %ecx,8(%eax) \n\t" |
| 171 | "movl %edx,12(%eax) \n\t" |
| 172 | "movl %esi,16(%eax) \n\t" |
| 173 | "movl %edi,20(%eax) \n\t" |
| 174 | "movw %ds,24(%eax) \n\t" |
| 175 | "movw %es,26(%eax) \n\t" |
| 176 | "popl %ebx \n\t" |
| 177 | "movl %ebx,(%eax) \n\t" |
| 178 | "popl %ebx \n\t" |
| 179 | "movl %ebx,28(%eax) \n\t" |
| 180 | "pop %es \n\t" |
| 181 | "popf \n\t" |
| 182 | "popa \n\t" |
| 183 | "leave \n\t" |
| 184 | "ret \n\t" |
| 185 | ".previous"); |
| 186 | |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 187 | |
| 188 | /* |
| 189 | * cru_detect |
| 190 | * |
| 191 | * Routine Description: |
| 192 | * This function uses the 32-bit BIOS Service Directory record to |
| 193 | * search for a $CRU record. |
| 194 | * |
| 195 | * Return Value: |
| 196 | * 0 : SUCCESS |
| 197 | * <0 : FAILURE |
| 198 | */ |
| 199 | static int __devinit cru_detect(unsigned long map_entry, |
| 200 | unsigned long map_offset) |
| 201 | { |
| 202 | void *bios32_map; |
| 203 | unsigned long *bios32_entrypoint; |
| 204 | unsigned long cru_physical_address; |
| 205 | unsigned long cru_length; |
| 206 | unsigned long physical_bios_base = 0; |
| 207 | unsigned long physical_bios_offset = 0; |
| 208 | int retval = -ENODEV; |
| 209 | |
| 210 | bios32_map = ioremap(map_entry, (2 * PAGE_SIZE)); |
| 211 | |
| 212 | if (bios32_map == NULL) |
| 213 | return -ENODEV; |
| 214 | |
| 215 | bios32_entrypoint = bios32_map + map_offset; |
| 216 | |
| 217 | cmn_regs.u1.reax = CRU_BIOS_SIGNATURE_VALUE; |
| 218 | |
| 219 | asminline_call(&cmn_regs, bios32_entrypoint); |
| 220 | |
| 221 | if (cmn_regs.u1.ral != 0) { |
| 222 | printk(KERN_WARNING |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 223 | "hpwdt: Call succeeded but with an error: 0x%x\n", |
| 224 | cmn_regs.u1.ral); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 225 | } else { |
| 226 | physical_bios_base = cmn_regs.u2.rebx; |
| 227 | physical_bios_offset = cmn_regs.u4.redx; |
| 228 | cru_length = cmn_regs.u3.recx; |
| 229 | cru_physical_address = |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 230 | physical_bios_base + physical_bios_offset; |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 231 | |
| 232 | /* If the values look OK, then map it in. */ |
| 233 | if ((physical_bios_base + physical_bios_offset)) { |
| 234 | cru_rom_addr = |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 235 | ioremap(cru_physical_address, cru_length); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 236 | if (cru_rom_addr) |
| 237 | retval = 0; |
| 238 | } |
| 239 | |
| 240 | printk(KERN_DEBUG "hpwdt: CRU Base Address: 0x%lx\n", |
| 241 | physical_bios_base); |
| 242 | printk(KERN_DEBUG "hpwdt: CRU Offset Address: 0x%lx\n", |
| 243 | physical_bios_offset); |
| 244 | printk(KERN_DEBUG "hpwdt: CRU Length: 0x%lx\n", |
| 245 | cru_length); |
Kulikov Vasiliy | adb2363 | 2010-07-14 22:06:30 +0400 | [diff] [blame] | 246 | printk(KERN_DEBUG "hpwdt: CRU Mapped Address: %p\n", |
| 247 | &cru_rom_addr); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 248 | } |
| 249 | iounmap(bios32_map); |
| 250 | return retval; |
| 251 | } |
| 252 | |
| 253 | /* |
Roland Dreier | 30ec910 | 2008-02-28 12:34:42 -0800 | [diff] [blame] | 254 | * bios_checksum |
| 255 | */ |
| 256 | static int __devinit bios_checksum(const char __iomem *ptr, int len) |
| 257 | { |
| 258 | char sum = 0; |
| 259 | int i; |
| 260 | |
| 261 | /* |
| 262 | * calculate checksum of size bytes. This should add up |
| 263 | * to zero if we have a valid header. |
| 264 | */ |
| 265 | for (i = 0; i < len; i++) |
| 266 | sum += ptr[i]; |
| 267 | |
| 268 | return ((sum == 0) && (len > 0)); |
| 269 | } |
| 270 | |
| 271 | /* |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 272 | * bios32_present |
| 273 | * |
| 274 | * Routine Description: |
| 275 | * This function finds the 32-bit BIOS Service Directory |
| 276 | * |
| 277 | * Return Value: |
| 278 | * 0 : SUCCESS |
| 279 | * <0 : FAILURE |
| 280 | */ |
| 281 | static int __devinit bios32_present(const char __iomem *p) |
| 282 | { |
| 283 | struct bios32_service_dir *bios_32_ptr; |
| 284 | int length; |
| 285 | unsigned long map_entry, map_offset; |
| 286 | |
| 287 | bios_32_ptr = (struct bios32_service_dir *) p; |
| 288 | |
| 289 | /* |
| 290 | * Search for signature by checking equal to the swizzled value |
| 291 | * instead of calling another routine to perform a strcmp. |
| 292 | */ |
| 293 | if (bios_32_ptr->signature == PCI_BIOS32_SD_VALUE) { |
| 294 | length = bios_32_ptr->length * PCI_BIOS32_PARAGRAPH_LEN; |
| 295 | if (bios_checksum(p, length)) { |
| 296 | /* |
| 297 | * According to the spec, we're looking for the |
| 298 | * first 4KB-aligned address below the entrypoint |
| 299 | * listed in the header. The Service Directory code |
| 300 | * is guaranteed to occupy no more than 2 4KB pages. |
| 301 | */ |
| 302 | map_entry = bios_32_ptr->entry_point & ~(PAGE_SIZE - 1); |
| 303 | map_offset = bios_32_ptr->entry_point - map_entry; |
| 304 | |
| 305 | return cru_detect(map_entry, map_offset); |
| 306 | } |
| 307 | } |
| 308 | return -ENODEV; |
| 309 | } |
| 310 | |
| 311 | static int __devinit detect_cru_service(void) |
| 312 | { |
| 313 | char __iomem *p, *q; |
| 314 | int rc = -1; |
| 315 | |
| 316 | /* |
| 317 | * Search from 0x0f0000 through 0x0fffff, inclusive. |
| 318 | */ |
| 319 | p = ioremap(PCI_ROM_BASE1, ROM_SIZE); |
| 320 | if (p == NULL) |
| 321 | return -ENOMEM; |
| 322 | |
| 323 | for (q = p; q < p + ROM_SIZE; q += 16) { |
| 324 | rc = bios32_present(q); |
| 325 | if (!rc) |
| 326 | break; |
| 327 | } |
| 328 | iounmap(p); |
| 329 | return rc; |
| 330 | } |
dann frazier | 6b7f3d5 | 2010-07-27 17:50:59 -0600 | [diff] [blame] | 331 | /* ------------------------------------------------------------------------- */ |
| 332 | #endif /* CONFIG_X86_32 */ |
| 333 | #ifdef CONFIG_X86_64 |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 334 | /* --64 Bit Bios------------------------------------------------------------ */ |
| 335 | |
| 336 | #define HPWDT_ARCH 64 |
| 337 | |
Linus Torvalds | 1f6ef23 | 2008-06-20 12:19:28 -0700 | [diff] [blame] | 338 | asm(".text \n\t" |
| 339 | ".align 4 \n" |
| 340 | "asminline_call: \n\t" |
| 341 | "pushq %rbp \n\t" |
| 342 | "movq %rsp, %rbp \n\t" |
| 343 | "pushq %rax \n\t" |
| 344 | "pushq %rbx \n\t" |
| 345 | "pushq %rdx \n\t" |
| 346 | "pushq %r12 \n\t" |
| 347 | "pushq %r9 \n\t" |
| 348 | "movq %rsi, %r12 \n\t" |
| 349 | "movq %rdi, %r9 \n\t" |
| 350 | "movl 4(%r9),%ebx \n\t" |
| 351 | "movl 8(%r9),%ecx \n\t" |
| 352 | "movl 12(%r9),%edx \n\t" |
| 353 | "movl 16(%r9),%esi \n\t" |
| 354 | "movl 20(%r9),%edi \n\t" |
| 355 | "movl (%r9),%eax \n\t" |
| 356 | "call *%r12 \n\t" |
| 357 | "pushfq \n\t" |
| 358 | "popq %r12 \n\t" |
Linus Torvalds | 1f6ef23 | 2008-06-20 12:19:28 -0700 | [diff] [blame] | 359 | "movl %eax, (%r9) \n\t" |
| 360 | "movl %ebx, 4(%r9) \n\t" |
| 361 | "movl %ecx, 8(%r9) \n\t" |
| 362 | "movl %edx, 12(%r9) \n\t" |
| 363 | "movl %esi, 16(%r9) \n\t" |
| 364 | "movl %edi, 20(%r9) \n\t" |
| 365 | "movq %r12, %rax \n\t" |
| 366 | "movl %eax, 28(%r9) \n\t" |
| 367 | "popq %r9 \n\t" |
| 368 | "popq %r12 \n\t" |
| 369 | "popq %rdx \n\t" |
| 370 | "popq %rbx \n\t" |
| 371 | "popq %rax \n\t" |
| 372 | "leave \n\t" |
| 373 | "ret \n\t" |
| 374 | ".previous"); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 375 | |
| 376 | /* |
| 377 | * dmi_find_cru |
| 378 | * |
| 379 | * Routine Description: |
Roland Dreier | 30ec910 | 2008-02-28 12:34:42 -0800 | [diff] [blame] | 380 | * This function checks whether or not a SMBIOS/DMI record is |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 381 | * the 64bit CRU info or not |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 382 | */ |
Jean Delvare | e7a19c5 | 2009-03-30 21:46:44 +0200 | [diff] [blame] | 383 | static void __devinit dmi_find_cru(const struct dmi_header *dm, void *dummy) |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 384 | { |
| 385 | struct smbios_cru64_info *smbios_cru64_ptr; |
| 386 | unsigned long cru_physical_address; |
| 387 | |
| 388 | if (dm->type == SMBIOS_CRU64_INFORMATION) { |
| 389 | smbios_cru64_ptr = (struct smbios_cru64_info *) dm; |
| 390 | if (smbios_cru64_ptr->signature == CRU_BIOS_SIGNATURE_VALUE) { |
| 391 | cru_physical_address = |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 392 | smbios_cru64_ptr->physical_address + |
| 393 | smbios_cru64_ptr->double_offset; |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 394 | cru_rom_addr = ioremap(cru_physical_address, |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 395 | smbios_cru64_ptr->double_length); |
Bernhard Walle | 0602641 | 2008-11-14 15:47:03 +0100 | [diff] [blame] | 396 | set_memory_x((unsigned long)cru_rom_addr & PAGE_MASK, |
| 397 | smbios_cru64_ptr->double_length >> PAGE_SHIFT); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 398 | } |
| 399 | } |
| 400 | } |
| 401 | |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 402 | static int __devinit detect_cru_service(void) |
| 403 | { |
| 404 | cru_rom_addr = NULL; |
| 405 | |
Jean Delvare | e7a19c5 | 2009-03-30 21:46:44 +0200 | [diff] [blame] | 406 | dmi_walk(dmi_find_cru, NULL); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 407 | |
| 408 | /* if cru_rom_addr has been set then we found a CRU service */ |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 409 | return ((cru_rom_addr != NULL) ? 0 : -ENODEV); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 410 | } |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 411 | /* ------------------------------------------------------------------------- */ |
dann frazier | 6b7f3d5 | 2010-07-27 17:50:59 -0600 | [diff] [blame] | 412 | #endif /* CONFIG_X86_64 */ |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 413 | #endif /* CONFIG_HPWDT_NMI_DECODING */ |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 414 | |
| 415 | /* |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 416 | * Watchdog operations |
| 417 | */ |
| 418 | static void hpwdt_start(void) |
| 419 | { |
dann frazier | e802e32 | 2010-06-02 16:23:39 -0600 | [diff] [blame] | 420 | reload = SECS_TO_TICKS(soft_margin); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 421 | iowrite16(reload, hpwdt_timer_reg); |
| 422 | iowrite16(0x85, hpwdt_timer_con); |
| 423 | } |
| 424 | |
| 425 | static void hpwdt_stop(void) |
| 426 | { |
| 427 | unsigned long data; |
| 428 | |
| 429 | data = ioread16(hpwdt_timer_con); |
| 430 | data &= 0xFE; |
| 431 | iowrite16(data, hpwdt_timer_con); |
| 432 | } |
| 433 | |
| 434 | static void hpwdt_ping(void) |
| 435 | { |
| 436 | iowrite16(reload, hpwdt_timer_reg); |
| 437 | } |
| 438 | |
| 439 | static int hpwdt_change_timer(int new_margin) |
| 440 | { |
dann frazier | 6f681c2 | 2010-06-02 16:23:40 -0600 | [diff] [blame] | 441 | if (new_margin < 1 || new_margin > HPWDT_MAX_TIMER) { |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 442 | printk(KERN_WARNING |
| 443 | "hpwdt: New value passed in is invalid: %d seconds.\n", |
| 444 | new_margin); |
| 445 | return -EINVAL; |
| 446 | } |
| 447 | |
| 448 | soft_margin = new_margin; |
| 449 | printk(KERN_DEBUG |
| 450 | "hpwdt: New timer passed in is %d seconds.\n", |
| 451 | new_margin); |
dann frazier | e802e32 | 2010-06-02 16:23:39 -0600 | [diff] [blame] | 452 | reload = SECS_TO_TICKS(soft_margin); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 453 | |
| 454 | return 0; |
| 455 | } |
| 456 | |
dann frazier | aae67f3 | 2010-06-02 16:23:41 -0600 | [diff] [blame] | 457 | static int hpwdt_time_left(void) |
| 458 | { |
| 459 | return TICKS_TO_SECS(ioread16(hpwdt_timer_reg)); |
| 460 | } |
| 461 | |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 462 | #ifdef CONFIG_HPWDT_NMI_DECODING |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 463 | /* |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 464 | * NMI Handler |
| 465 | */ |
| 466 | static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason, |
| 467 | void *data) |
| 468 | { |
| 469 | unsigned long rom_pl; |
| 470 | static int die_nmi_called; |
| 471 | |
| 472 | if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI) |
dann frazier | 243066b | 2010-07-27 17:50:49 -0600 | [diff] [blame] | 473 | goto out; |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 474 | |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 475 | if (!hpwdt_nmi_decoding) |
dann frazier | 243066b | 2010-07-27 17:50:49 -0600 | [diff] [blame] | 476 | goto out; |
| 477 | |
| 478 | spin_lock_irqsave(&rom_lock, rom_pl); |
| 479 | if (!die_nmi_called) |
| 480 | asminline_call(&cmn_regs, cru_rom_addr); |
| 481 | die_nmi_called = 1; |
| 482 | spin_unlock_irqrestore(&rom_lock, rom_pl); |
| 483 | if (cmn_regs.u1.ral == 0) { |
| 484 | printk(KERN_WARNING "hpwdt: An NMI occurred, " |
| 485 | "but unable to determine source.\n"); |
| 486 | } else { |
| 487 | if (allow_kdump) |
| 488 | hpwdt_stop(); |
| 489 | panic("An NMI occurred, please see the Integrated " |
| 490 | "Management Log for details.\n"); |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 491 | } |
dann frazier | 243066b | 2010-07-27 17:50:49 -0600 | [diff] [blame] | 492 | out: |
Bernhard Walle | 290172e | 2008-10-26 15:59:37 +0100 | [diff] [blame] | 493 | return NOTIFY_OK; |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 494 | } |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 495 | #endif /* CONFIG_HPWDT_NMI_DECODING */ |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 496 | |
| 497 | /* |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 498 | * /dev/watchdog handling |
| 499 | */ |
| 500 | static int hpwdt_open(struct inode *inode, struct file *file) |
| 501 | { |
| 502 | /* /dev/watchdog can only be opened once */ |
| 503 | if (test_and_set_bit(0, &hpwdt_is_open)) |
| 504 | return -EBUSY; |
| 505 | |
| 506 | /* Start the watchdog */ |
| 507 | hpwdt_start(); |
| 508 | hpwdt_ping(); |
| 509 | |
| 510 | return nonseekable_open(inode, file); |
| 511 | } |
| 512 | |
| 513 | static int hpwdt_release(struct inode *inode, struct file *file) |
| 514 | { |
| 515 | /* Stop the watchdog */ |
| 516 | if (expect_release == 42) { |
| 517 | hpwdt_stop(); |
| 518 | } else { |
| 519 | printk(KERN_CRIT |
| 520 | "hpwdt: Unexpected close, not stopping watchdog!\n"); |
| 521 | hpwdt_ping(); |
| 522 | } |
| 523 | |
| 524 | expect_release = 0; |
| 525 | |
| 526 | /* /dev/watchdog is being closed, make sure it can be re-opened */ |
| 527 | clear_bit(0, &hpwdt_is_open); |
| 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | static ssize_t hpwdt_write(struct file *file, const char __user *data, |
| 533 | size_t len, loff_t *ppos) |
| 534 | { |
| 535 | /* See if we got the magic character 'V' and reload the timer */ |
| 536 | if (len) { |
| 537 | if (!nowayout) { |
| 538 | size_t i; |
| 539 | |
| 540 | /* note: just in case someone wrote the magic character |
| 541 | * five months ago... */ |
| 542 | expect_release = 0; |
| 543 | |
| 544 | /* scan to see whether or not we got the magic char. */ |
| 545 | for (i = 0; i != len; i++) { |
| 546 | char c; |
Wim Van Sebroeck | 7944d3a | 2008-08-06 20:19:41 +0000 | [diff] [blame] | 547 | if (get_user(c, data + i)) |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 548 | return -EFAULT; |
| 549 | if (c == 'V') |
| 550 | expect_release = 42; |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | /* someone wrote to us, we should reload the timer */ |
| 555 | hpwdt_ping(); |
| 556 | } |
| 557 | |
| 558 | return len; |
| 559 | } |
| 560 | |
Wim Van Sebroeck | 42747d7 | 2009-12-26 18:55:22 +0000 | [diff] [blame] | 561 | static const struct watchdog_info ident = { |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 562 | .options = WDIOF_SETTIMEOUT | |
| 563 | WDIOF_KEEPALIVEPING | |
| 564 | WDIOF_MAGICCLOSE, |
dann frazier | 36e3ff4 | 2010-07-27 17:50:57 -0600 | [diff] [blame] | 565 | .identity = "HP iLO2+ HW Watchdog Timer", |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 566 | }; |
| 567 | |
| 568 | static long hpwdt_ioctl(struct file *file, unsigned int cmd, |
| 569 | unsigned long arg) |
| 570 | { |
| 571 | void __user *argp = (void __user *)arg; |
| 572 | int __user *p = argp; |
| 573 | int new_margin; |
| 574 | int ret = -ENOTTY; |
| 575 | |
| 576 | switch (cmd) { |
| 577 | case WDIOC_GETSUPPORT: |
| 578 | ret = 0; |
| 579 | if (copy_to_user(argp, &ident, sizeof(ident))) |
| 580 | ret = -EFAULT; |
| 581 | break; |
| 582 | |
| 583 | case WDIOC_GETSTATUS: |
| 584 | case WDIOC_GETBOOTSTATUS: |
| 585 | ret = put_user(0, p); |
| 586 | break; |
| 587 | |
| 588 | case WDIOC_KEEPALIVE: |
| 589 | hpwdt_ping(); |
| 590 | ret = 0; |
| 591 | break; |
| 592 | |
| 593 | case WDIOC_SETTIMEOUT: |
| 594 | ret = get_user(new_margin, p); |
| 595 | if (ret) |
| 596 | break; |
| 597 | |
| 598 | ret = hpwdt_change_timer(new_margin); |
| 599 | if (ret) |
| 600 | break; |
| 601 | |
| 602 | hpwdt_ping(); |
| 603 | /* Fall */ |
| 604 | case WDIOC_GETTIMEOUT: |
| 605 | ret = put_user(soft_margin, p); |
| 606 | break; |
dann frazier | aae67f3 | 2010-06-02 16:23:41 -0600 | [diff] [blame] | 607 | |
| 608 | case WDIOC_GETTIMELEFT: |
| 609 | ret = put_user(hpwdt_time_left(), p); |
| 610 | break; |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 611 | } |
| 612 | return ret; |
| 613 | } |
| 614 | |
| 615 | /* |
| 616 | * Kernel interfaces |
| 617 | */ |
Wim Van Sebroeck | d5c26a5 | 2009-03-18 08:18:43 +0000 | [diff] [blame] | 618 | static const struct file_operations hpwdt_fops = { |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 619 | .owner = THIS_MODULE, |
| 620 | .llseek = no_llseek, |
| 621 | .write = hpwdt_write, |
| 622 | .unlocked_ioctl = hpwdt_ioctl, |
| 623 | .open = hpwdt_open, |
| 624 | .release = hpwdt_release, |
| 625 | }; |
| 626 | |
| 627 | static struct miscdevice hpwdt_miscdev = { |
| 628 | .minor = WATCHDOG_MINOR, |
| 629 | .name = "watchdog", |
| 630 | .fops = &hpwdt_fops, |
| 631 | }; |
| 632 | |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 633 | #ifdef CONFIG_HPWDT_NMI_DECODING |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 634 | static struct notifier_block die_notifier = { |
| 635 | .notifier_call = hpwdt_pretimeout, |
Tom Mingarelli | 44df753 | 2009-06-18 23:28:57 +0000 | [diff] [blame] | 636 | .priority = 0, |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 637 | }; |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 638 | #endif /* CONFIG_HPWDT_NMI_DECODING */ |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 639 | |
| 640 | /* |
| 641 | * Init & Exit |
| 642 | */ |
| 643 | |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 644 | #ifdef CONFIG_HPWDT_NMI_DECODING |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 645 | #ifdef ARCH_HAS_NMI_WATCHDOG |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 646 | static void __devinit hpwdt_check_nmi_decoding(struct pci_dev *dev) |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 647 | { |
| 648 | /* |
| 649 | * If nmi_watchdog is turned off then we can turn on |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 650 | * our nmi decoding capability. |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 651 | */ |
| 652 | if (!nmi_watchdog_active()) |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 653 | hpwdt_nmi_decoding = 1; |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 654 | else |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 655 | dev_warn(&dev->dev, "NMI decoding is disabled. To enable this " |
Tom Mingarelli | 44df753 | 2009-06-18 23:28:57 +0000 | [diff] [blame] | 656 | "functionality you must reboot with nmi_watchdog=0 " |
| 657 | "and load the hpwdt driver with priority=1.\n"); |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 658 | } |
| 659 | #else |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 660 | static void __devinit hpwdt_check_nmi_decoding(struct pci_dev *dev) |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 661 | { |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 662 | dev_warn(&dev->dev, "NMI decoding is disabled. " |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 663 | "Your kernel does not support a NMI Watchdog.\n"); |
| 664 | } |
dann frazier | 2ec7ed6 | 2010-07-28 12:38:43 -0600 | [diff] [blame] | 665 | #endif /* ARCH_HAS_NMI_WATCHDOG */ |
| 666 | |
| 667 | static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev) |
| 668 | { |
| 669 | int retval; |
| 670 | |
| 671 | /* |
| 672 | * We need to map the ROM to get the CRU service. |
| 673 | * For 32 bit Operating Systems we need to go through the 32 Bit |
| 674 | * BIOS Service Directory |
| 675 | * For 64 bit Operating Systems we get that service through SMBIOS. |
| 676 | */ |
| 677 | retval = detect_cru_service(); |
| 678 | if (retval < 0) { |
| 679 | dev_warn(&dev->dev, |
| 680 | "Unable to detect the %d Bit CRU Service.\n", |
| 681 | HPWDT_ARCH); |
| 682 | return retval; |
| 683 | } |
| 684 | |
| 685 | /* |
| 686 | * We know this is the only CRU call we need to make so lets keep as |
| 687 | * few instructions as possible once the NMI comes in. |
| 688 | */ |
| 689 | cmn_regs.u1.rah = 0x0D; |
| 690 | cmn_regs.u1.ral = 0x02; |
| 691 | |
| 692 | /* |
| 693 | * If the priority is set to 1, then we will be put first on the |
| 694 | * die notify list to handle a critical NMI. The default is to |
| 695 | * be last so other users of the NMI signal can function. |
| 696 | */ |
| 697 | if (priority) |
| 698 | die_notifier.priority = 0x7FFFFFFF; |
| 699 | |
| 700 | retval = register_die_notifier(&die_notifier); |
| 701 | if (retval != 0) { |
| 702 | dev_warn(&dev->dev, |
| 703 | "Unable to register a die notifier (err=%d).\n", |
| 704 | retval); |
| 705 | if (cru_rom_addr) |
| 706 | iounmap(cru_rom_addr); |
| 707 | } |
| 708 | |
| 709 | dev_info(&dev->dev, |
| 710 | "HP Watchdog Timer Driver: NMI decoding initialized" |
| 711 | ", allow kernel dump: %s (default = 0/OFF)" |
| 712 | ", priority: %s (default = 0/LAST).\n", |
| 713 | (allow_kdump == 0) ? "OFF" : "ON", |
| 714 | (priority == 0) ? "LAST" : "FIRST"); |
| 715 | return 0; |
| 716 | } |
| 717 | |
| 718 | static void __devexit hpwdt_exit_nmi_decoding(void) |
| 719 | { |
| 720 | unregister_die_notifier(&die_notifier); |
| 721 | if (cru_rom_addr) |
| 722 | iounmap(cru_rom_addr); |
| 723 | } |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 724 | #else /* !CONFIG_HPWDT_NMI_DECODING */ |
| 725 | static void __devinit hpwdt_check_nmi_decoding(struct pci_dev *dev) |
| 726 | { |
| 727 | } |
| 728 | |
| 729 | static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev) |
| 730 | { |
| 731 | return 0; |
| 732 | } |
| 733 | |
| 734 | static void __devexit hpwdt_exit_nmi_decoding(void) |
| 735 | { |
| 736 | } |
| 737 | #endif /* CONFIG_HPWDT_NMI_DECODING */ |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 738 | |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 739 | static int __devinit hpwdt_init_one(struct pci_dev *dev, |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 740 | const struct pci_device_id *ent) |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 741 | { |
| 742 | int retval; |
| 743 | |
| 744 | /* |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 745 | * Check if we can do NMI decoding or not |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 746 | */ |
dann frazier | 34572b2 | 2010-07-27 17:51:01 -0600 | [diff] [blame] | 747 | hpwdt_check_nmi_decoding(dev); |
Thomas Mingarelli | 47bece8 | 2009-06-04 19:50:45 +0000 | [diff] [blame] | 748 | |
| 749 | /* |
dann frazier | 36e3ff4 | 2010-07-27 17:50:57 -0600 | [diff] [blame] | 750 | * First let's find out if we are on an iLO2+ server. We will |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 751 | * not run on a legacy ASM box. |
Thomas Mingarelli | ab4ba3c | 2008-07-15 19:40:41 +0000 | [diff] [blame] | 752 | * So we only support the G5 ProLiant servers and higher. |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 753 | */ |
| 754 | if (dev->subsystem_vendor != PCI_VENDOR_ID_HP) { |
| 755 | dev_warn(&dev->dev, |
dann frazier | 36e3ff4 | 2010-07-27 17:50:57 -0600 | [diff] [blame] | 756 | "This server does not have an iLO2+ ASIC.\n"); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 757 | return -ENODEV; |
| 758 | } |
| 759 | |
| 760 | if (pci_enable_device(dev)) { |
| 761 | dev_warn(&dev->dev, |
| 762 | "Not possible to enable PCI Device: 0x%x:0x%x.\n", |
| 763 | ent->vendor, ent->device); |
| 764 | return -ENODEV; |
| 765 | } |
| 766 | |
| 767 | pci_mem_addr = pci_iomap(dev, 1, 0x80); |
| 768 | if (!pci_mem_addr) { |
| 769 | dev_warn(&dev->dev, |
dann frazier | 36e3ff4 | 2010-07-27 17:50:57 -0600 | [diff] [blame] | 770 | "Unable to detect the iLO2+ server memory.\n"); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 771 | retval = -ENOMEM; |
| 772 | goto error_pci_iomap; |
| 773 | } |
| 774 | hpwdt_timer_reg = pci_mem_addr + 0x70; |
| 775 | hpwdt_timer_con = pci_mem_addr + 0x72; |
| 776 | |
| 777 | /* Make sure that we have a valid soft_margin */ |
| 778 | if (hpwdt_change_timer(soft_margin)) |
| 779 | hpwdt_change_timer(DEFAULT_MARGIN); |
| 780 | |
dann frazier | 2ec7ed6 | 2010-07-28 12:38:43 -0600 | [diff] [blame] | 781 | /* Initialize NMI Decoding functionality */ |
| 782 | retval = hpwdt_init_nmi_decoding(dev); |
| 783 | if (retval != 0) |
| 784 | goto error_init_nmi_decoding; |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 785 | |
| 786 | retval = misc_register(&hpwdt_miscdev); |
| 787 | if (retval < 0) { |
| 788 | dev_warn(&dev->dev, |
| 789 | "Unable to register miscdev on minor=%d (err=%d).\n", |
| 790 | WATCHDOG_MINOR, retval); |
| 791 | goto error_misc_register; |
| 792 | } |
| 793 | |
dann frazier | 2ec7ed6 | 2010-07-28 12:38:43 -0600 | [diff] [blame] | 794 | dev_info(&dev->dev, "HP Watchdog Timer Driver: %s" |
| 795 | ", timer margin: %d seconds (nowayout=%d).\n", |
| 796 | HPWDT_VERSION, soft_margin, nowayout); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 797 | return 0; |
| 798 | |
| 799 | error_misc_register: |
dann frazier | 2ec7ed6 | 2010-07-28 12:38:43 -0600 | [diff] [blame] | 800 | hpwdt_exit_nmi_decoding(); |
| 801 | error_init_nmi_decoding: |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 802 | pci_iounmap(dev, pci_mem_addr); |
| 803 | error_pci_iomap: |
| 804 | pci_disable_device(dev); |
| 805 | return retval; |
| 806 | } |
| 807 | |
| 808 | static void __devexit hpwdt_exit(struct pci_dev *dev) |
| 809 | { |
| 810 | if (!nowayout) |
| 811 | hpwdt_stop(); |
| 812 | |
| 813 | misc_deregister(&hpwdt_miscdev); |
dann frazier | 2ec7ed6 | 2010-07-28 12:38:43 -0600 | [diff] [blame] | 814 | hpwdt_exit_nmi_decoding(); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 815 | pci_iounmap(dev, pci_mem_addr); |
| 816 | pci_disable_device(dev); |
| 817 | } |
| 818 | |
| 819 | static struct pci_driver hpwdt_driver = { |
| 820 | .name = "hpwdt", |
| 821 | .id_table = hpwdt_devices, |
| 822 | .probe = hpwdt_init_one, |
| 823 | .remove = __devexit_p(hpwdt_exit), |
| 824 | }; |
| 825 | |
| 826 | static void __exit hpwdt_cleanup(void) |
| 827 | { |
| 828 | pci_unregister_driver(&hpwdt_driver); |
| 829 | } |
| 830 | |
| 831 | static int __init hpwdt_init(void) |
| 832 | { |
| 833 | return pci_register_driver(&hpwdt_driver); |
| 834 | } |
| 835 | |
| 836 | MODULE_AUTHOR("Tom Mingarelli"); |
| 837 | MODULE_DESCRIPTION("hp watchdog driver"); |
| 838 | MODULE_LICENSE("GPL"); |
Thomas Mingarelli | d8100c3 | 2009-03-03 00:17:16 +0000 | [diff] [blame] | 839 | MODULE_VERSION(HPWDT_VERSION); |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 840 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); |
| 841 | |
| 842 | module_param(soft_margin, int, 0); |
| 843 | MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds"); |
| 844 | |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 845 | module_param(nowayout, int, 0); |
| 846 | MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" |
| 847 | __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); |
| 848 | |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 849 | #ifdef CONFIG_HPWDT_NMI_DECODING |
dann frazier | 550d299 | 2010-07-27 17:50:54 -0600 | [diff] [blame] | 850 | module_param(allow_kdump, int, 0); |
| 851 | MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs"); |
| 852 | |
Tom Mingarelli | 44df753 | 2009-06-18 23:28:57 +0000 | [diff] [blame] | 853 | module_param(priority, int, 0); |
| 854 | MODULE_PARM_DESC(priority, "The hpwdt driver handles NMIs first or last" |
| 855 | " (default = 0/Last)\n"); |
dann frazier | 86ded1f | 2010-07-27 17:51:02 -0600 | [diff] [blame] | 856 | #endif /* !CONFIG_HPWDT_NMI_DECODING */ |
Tom Mingarelli | 44df753 | 2009-06-18 23:28:57 +0000 | [diff] [blame] | 857 | |
Thomas Mingarelli | 7f4da47 | 2007-12-04 17:41:54 +0000 | [diff] [blame] | 858 | module_init(hpwdt_init); |
| 859 | module_exit(hpwdt_cleanup); |