Diff markup
1 /* 1 /*
2 * HP WatchDog Driver 2 * HP WatchDog Driver
3 * based on 3 * based on
4 * 4 *
5 * SoftDog 0.05: A Software Watchdog De 5 * SoftDog 0.05: A Software Watchdog Device
6 * 6 *
7 * (c) Copyright 2007 Hewlett-Packard Dev 7 * (c) Copyright 2007 Hewlett-Packard Development Company, L.P.
8 * Thomas Mingarelli <thomas.mingarelli@h 8 * Thomas Mingarelli <thomas.mingarelli@hp.com>
9 * 9 *
10 * This program is free software; you can 10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU G 11 * modify it under the terms of the GNU General Public License
12 * version 2 as published by the Free Sof 12 * version 2 as published by the Free Software Foundation
13 * 13 *
14 */ 14 */
15 15
16 #include <linux/device.h> 16 #include <linux/device.h>
17 #include <linux/fs.h> 17 #include <linux/fs.h>
18 #include <linux/init.h> 18 #include <linux/init.h>
19 #include <linux/interrupt.h> 19 #include <linux/interrupt.h>
20 #include <linux/io.h> 20 #include <linux/io.h>
21 #include <linux/irq.h> 21 #include <linux/irq.h>
22 #include <linux/nmi.h> <<
23 #include <linux/kernel.h> 22 #include <linux/kernel.h>
24 #include <linux/miscdevice.h> 23 #include <linux/miscdevice.h>
25 #include <linux/mm.h> 24 #include <linux/mm.h>
26 #include <linux/module.h> 25 #include <linux/module.h>
27 #include <linux/kdebug.h> 26 #include <linux/kdebug.h>
28 #include <linux/moduleparam.h> 27 #include <linux/moduleparam.h>
29 #include <linux/notifier.h> 28 #include <linux/notifier.h>
30 #include <linux/pci.h> 29 #include <linux/pci.h>
31 #include <linux/pci_ids.h> 30 #include <linux/pci_ids.h>
32 #include <linux/reboot.h> 31 #include <linux/reboot.h>
33 #include <linux/sched.h> 32 #include <linux/sched.h>
34 #include <linux/timer.h> 33 #include <linux/timer.h>
35 #include <linux/types.h> 34 #include <linux/types.h>
36 #include <linux/uaccess.h> 35 #include <linux/uaccess.h>
37 #include <linux/watchdog.h> 36 #include <linux/watchdog.h>
38 #include <linux/dmi.h> 37 #include <linux/dmi.h>
39 #include <linux/efi.h> 38 #include <linux/efi.h>
40 #include <linux/string.h> 39 #include <linux/string.h>
41 #include <linux/bootmem.h> 40 #include <linux/bootmem.h>
42 #include <linux/slab.h> 41 #include <linux/slab.h>
>> 42 #include <asm/dmi.h>
43 #include <asm/desc.h> 43 #include <asm/desc.h>
44 #include <asm/cacheflush.h> !! 44 #include <asm/kdebug.h>
45 45
46 #define PCI_BIOS32_SD_VALUE 0x5F32 46 #define PCI_BIOS32_SD_VALUE 0x5F32335F /* "_32_" */
47 #define CRU_BIOS_SIGNATURE_VALUE 0x5552 47 #define CRU_BIOS_SIGNATURE_VALUE 0x55524324
48 #define PCI_BIOS32_PARAGRAPH_LEN 16 48 #define PCI_BIOS32_PARAGRAPH_LEN 16
49 #define PCI_ROM_BASE1 0x000F 49 #define PCI_ROM_BASE1 0x000F0000
50 #define ROM_SIZE 0x1000 50 #define ROM_SIZE 0x10000
51 #define HPWDT_VERSION "1.1.1 <<
52 51
53 struct bios32_service_dir { 52 struct bios32_service_dir {
54 u32 signature; 53 u32 signature;
55 u32 entry_point; 54 u32 entry_point;
56 u8 revision; 55 u8 revision;
57 u8 length; 56 u8 length;
58 u8 checksum; 57 u8 checksum;
59 u8 reserved[5]; 58 u8 reserved[5];
60 }; 59 };
61 60
62 /* type 212 */ 61 /* type 212 */
63 struct smbios_cru64_info { 62 struct smbios_cru64_info {
64 u8 type; 63 u8 type;
65 u8 byte_length; 64 u8 byte_length;
66 u16 handle; 65 u16 handle;
67 u32 signature; 66 u32 signature;
68 u64 physical_address; 67 u64 physical_address;
69 u32 double_length; 68 u32 double_length;
70 u32 double_offset; 69 u32 double_offset;
71 }; 70 };
72 #define SMBIOS_CRU64_INFORMATION 212 71 #define SMBIOS_CRU64_INFORMATION 212
73 72
74 struct cmn_registers { 73 struct cmn_registers {
75 union { 74 union {
76 struct { 75 struct {
77 u8 ral; 76 u8 ral;
78 u8 rah; 77 u8 rah;
79 u16 rea2; 78 u16 rea2;
80 }; 79 };
81 u32 reax; 80 u32 reax;
82 } u1; 81 } u1;
83 union { 82 union {
84 struct { 83 struct {
85 u8 rbl; 84 u8 rbl;
86 u8 rbh; 85 u8 rbh;
87 u8 reb2l; 86 u8 reb2l;
88 u8 reb2h; 87 u8 reb2h;
89 }; 88 };
90 u32 rebx; 89 u32 rebx;
91 } u2; 90 } u2;
92 union { 91 union {
93 struct { 92 struct {
94 u8 rcl; 93 u8 rcl;
95 u8 rch; 94 u8 rch;
96 u16 rec2; 95 u16 rec2;
97 }; 96 };
98 u32 recx; 97 u32 recx;
99 } u3; 98 } u3;
100 union { 99 union {
101 struct { 100 struct {
102 u8 rdl; 101 u8 rdl;
103 u8 rdh; 102 u8 rdh;
104 u16 red2; 103 u16 red2;
105 }; 104 };
106 u32 redx; 105 u32 redx;
107 } u4; 106 } u4;
108 107
109 u32 resi; 108 u32 resi;
110 u32 redi; 109 u32 redi;
111 u16 rds; 110 u16 rds;
112 u16 res; 111 u16 res;
113 u32 reflags; 112 u32 reflags;
114 } __attribute__((packed)); 113 } __attribute__((packed));
115 114
116 #define DEFAULT_MARGIN 30 115 #define DEFAULT_MARGIN 30
117 static unsigned int soft_margin = DEFAULT_MARG 116 static unsigned int soft_margin = DEFAULT_MARGIN; /* in seconds */
118 static unsigned int reload; 117 static unsigned int reload; /* the computed soft_margin */
119 static int nowayout = WATCHDOG_NOWAYOUT; 118 static int nowayout = WATCHDOG_NOWAYOUT;
120 static char expect_release; 119 static char expect_release;
121 static unsigned long hpwdt_is_open; 120 static unsigned long hpwdt_is_open;
122 static unsigned int allow_kdump; <<
123 static unsigned int hpwdt_nmi_sourcing; <<
124 static unsigned int priority; /* hpw <<
125 121
126 static void __iomem *pci_mem_addr; 122 static void __iomem *pci_mem_addr; /* the PCI-memory address */
127 static unsigned long __iomem *hpwdt_timer_reg; 123 static unsigned long __iomem *hpwdt_timer_reg;
128 static unsigned long __iomem *hpwdt_timer_con; 124 static unsigned long __iomem *hpwdt_timer_con;
129 125
130 static DEFINE_SPINLOCK(rom_lock); 126 static DEFINE_SPINLOCK(rom_lock);
131 127
132 static void *cru_rom_addr; 128 static void *cru_rom_addr;
133 129
134 static struct cmn_registers cmn_regs; 130 static struct cmn_registers cmn_regs;
135 131
136 static struct pci_device_id hpwdt_devices[] = 132 static struct pci_device_id hpwdt_devices[] = {
137 { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB !! 133 {
138 { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3306) !! 134 .vendor = PCI_VENDOR_ID_COMPAQ,
>> 135 .device = 0xB203,
>> 136 .subvendor = PCI_ANY_ID,
>> 137 .subdevice = PCI_ANY_ID,
>> 138 },
139 {0}, /* terminate l 139 {0}, /* terminate list */
140 }; 140 };
141 MODULE_DEVICE_TABLE(pci, hpwdt_devices); 141 MODULE_DEVICE_TABLE(pci, hpwdt_devices);
142 142
143 extern asmlinkage void asminline_call(struct c <<
144 <<
145 <<
146 #ifndef CONFIG_X86_64 143 #ifndef CONFIG_X86_64
147 /* --32 Bit Bios------------------------------ 144 /* --32 Bit Bios------------------------------------------------------------ */
148 145
149 #define HPWDT_ARCH 32 146 #define HPWDT_ARCH 32
150 147
151 asm(".text \n\t" !! 148 static void asminline_call(struct cmn_registers *pi86Regs,
152 ".align 4 \n" !! 149 unsigned long *pRomEntry)
153 "asminline_call: \n\t" !! 150 {
154 "pushl %ebp \n\t" !! 151 asm("pushl %ebp \n\t"
155 "movl %esp, %ebp \n\t" !! 152 "movl %esp, %ebp \n\t"
156 "pusha \n\t" !! 153 "pusha \n\t"
157 "pushf \n\t" !! 154 "pushf \n\t"
158 "push %es \n\t" !! 155 "push %es \n\t"
159 "push %ds \n\t" !! 156 "push %ds \n\t"
160 "pop %es \n\t" !! 157 "pop %es \n\t"
161 "movl 8(%ebp),%eax \n\t" !! 158 "movl 8(%ebp),%eax \n\t"
162 "movl 4(%eax),%ebx \n\t" !! 159 "movl 4(%eax),%ebx \n\t"
163 "movl 8(%eax),%ecx \n\t" !! 160 "movl 8(%eax),%ecx \n\t"
164 "movl 12(%eax),%edx \n\t" !! 161 "movl 12(%eax),%edx \n\t"
165 "movl 16(%eax),%esi \n\t" !! 162 "movl 16(%eax),%esi \n\t"
166 "movl 20(%eax),%edi \n\t" !! 163 "movl 20(%eax),%edi \n\t"
167 "movl (%eax),%eax \n\t" !! 164 "movl (%eax),%eax \n\t"
168 "push %cs \n\t" !! 165 "push %cs \n\t"
169 "call *12(%ebp) \n\t" !! 166 "call *12(%ebp) \n\t"
170 "pushf \n\t" !! 167 "pushf \n\t"
171 "pushl %eax \n\t" !! 168 "pushl %eax \n\t"
172 "movl 8(%ebp),%eax \n\t" !! 169 "movl 8(%ebp),%eax \n\t"
173 "movl %ebx,4(%eax) \n\t" !! 170 "movl %ebx,4(%eax) \n\t"
174 "movl %ecx,8(%eax) \n\t" !! 171 "movl %ecx,8(%eax) \n\t"
175 "movl %edx,12(%eax) \n\t" !! 172 "movl %edx,12(%eax) \n\t"
176 "movl %esi,16(%eax) \n\t" !! 173 "movl %esi,16(%eax) \n\t"
177 "movl %edi,20(%eax) \n\t" !! 174 "movl %edi,20(%eax) \n\t"
178 "movw %ds,24(%eax) \n\t" !! 175 "movw %ds,24(%eax) \n\t"
179 "movw %es,26(%eax) \n\t" !! 176 "movw %es,26(%eax) \n\t"
180 "popl %ebx \n\t" !! 177 "popl %ebx \n\t"
181 "movl %ebx,(%eax) \n\t" !! 178 "movl %ebx,(%eax) \n\t"
182 "popl %ebx \n\t" !! 179 "popl %ebx \n\t"
183 "movl %ebx,28(%eax) \n\t" !! 180 "movl %ebx,28(%eax) \n\t"
184 "pop %es \n\t" !! 181 "pop %es \n\t"
185 "popf \n\t" !! 182 "popf \n\t"
186 "popa \n\t" !! 183 "popa \n\t"
187 "leave \n\t" !! 184 "leave \n\t" "ret");
188 "ret \n\t" !! 185 }
189 ".previous"); <<
190 <<
191 186
192 /* 187 /*
193 * cru_detect 188 * cru_detect
194 * 189 *
195 * Routine Description: 190 * Routine Description:
196 * This function uses the 32-bit BIOS Ser 191 * This function uses the 32-bit BIOS Service Directory record to
197 * search for a $CRU record. 192 * search for a $CRU record.
198 * 193 *
199 * Return Value: 194 * Return Value:
200 * 0 : SUCCESS 195 * 0 : SUCCESS
201 * <0 : FAILURE 196 * <0 : FAILURE
202 */ 197 */
203 static int __devinit cru_detect(unsigned long 198 static int __devinit cru_detect(unsigned long map_entry,
204 unsigned long map_offset) 199 unsigned long map_offset)
205 { 200 {
206 void *bios32_map; 201 void *bios32_map;
207 unsigned long *bios32_entrypoint; 202 unsigned long *bios32_entrypoint;
208 unsigned long cru_physical_address; 203 unsigned long cru_physical_address;
209 unsigned long cru_length; 204 unsigned long cru_length;
210 unsigned long physical_bios_base = 0; 205 unsigned long physical_bios_base = 0;
211 unsigned long physical_bios_offset = 0 206 unsigned long physical_bios_offset = 0;
212 int retval = -ENODEV; 207 int retval = -ENODEV;
213 208
214 bios32_map = ioremap(map_entry, (2 * P 209 bios32_map = ioremap(map_entry, (2 * PAGE_SIZE));
215 210
216 if (bios32_map == NULL) 211 if (bios32_map == NULL)
217 return -ENODEV; 212 return -ENODEV;
218 213
219 bios32_entrypoint = bios32_map + map_o 214 bios32_entrypoint = bios32_map + map_offset;
220 215
221 cmn_regs.u1.reax = CRU_BIOS_SIGNATURE_ 216 cmn_regs.u1.reax = CRU_BIOS_SIGNATURE_VALUE;
222 217
223 asminline_call(&cmn_regs, bios32_entry 218 asminline_call(&cmn_regs, bios32_entrypoint);
224 219
225 if (cmn_regs.u1.ral != 0) { 220 if (cmn_regs.u1.ral != 0) {
226 printk(KERN_WARNING 221 printk(KERN_WARNING
227 "hpwdt: Call succeeded !! 222 "hpwdt: Call succeeded but with an error: 0x%x\n",
228 cmn_regs.u1.ral); !! 223 cmn_regs.u1.ral);
229 } else { 224 } else {
230 physical_bios_base = cmn_regs. 225 physical_bios_base = cmn_regs.u2.rebx;
231 physical_bios_offset = cmn_reg 226 physical_bios_offset = cmn_regs.u4.redx;
232 cru_length = cmn_regs.u3.recx; 227 cru_length = cmn_regs.u3.recx;
233 cru_physical_address = 228 cru_physical_address =
234 physical_bios_base + p !! 229 physical_bios_base + physical_bios_offset;
235 230
236 /* If the values look OK, then 231 /* If the values look OK, then map it in. */
237 if ((physical_bios_base + phys 232 if ((physical_bios_base + physical_bios_offset)) {
238 cru_rom_addr = 233 cru_rom_addr =
239 ioremap(cru_ph !! 234 ioremap(cru_physical_address, cru_length);
240 if (cru_rom_addr) 235 if (cru_rom_addr)
241 retval = 0; 236 retval = 0;
242 } 237 }
243 238
244 printk(KERN_DEBUG "hpwdt: CRU 239 printk(KERN_DEBUG "hpwdt: CRU Base Address: 0x%lx\n",
245 physical_bios_base); 240 physical_bios_base);
246 printk(KERN_DEBUG "hpwdt: CRU 241 printk(KERN_DEBUG "hpwdt: CRU Offset Address: 0x%lx\n",
247 physical_bios_offset); 242 physical_bios_offset);
248 printk(KERN_DEBUG "hpwdt: CRU 243 printk(KERN_DEBUG "hpwdt: CRU Length: 0x%lx\n",
249 cru_length); 244 cru_length);
250 printk(KERN_DEBUG "hpwdt: CRU 245 printk(KERN_DEBUG "hpwdt: CRU Mapped Address: 0x%x\n",
251 (unsigned int)&cru_rom 246 (unsigned int)&cru_rom_addr);
252 } 247 }
253 iounmap(bios32_map); 248 iounmap(bios32_map);
254 return retval; 249 return retval;
255 } 250 }
256 251
257 /* 252 /*
258 * bios_checksum 253 * bios_checksum
259 */ 254 */
260 static int __devinit bios_checksum(const char 255 static int __devinit bios_checksum(const char __iomem *ptr, int len)
261 { 256 {
262 char sum = 0; 257 char sum = 0;
263 int i; 258 int i;
264 259
265 /* 260 /*
266 * calculate checksum of size bytes. T 261 * calculate checksum of size bytes. This should add up
267 * to zero if we have a valid header. 262 * to zero if we have a valid header.
268 */ 263 */
269 for (i = 0; i < len; i++) 264 for (i = 0; i < len; i++)
270 sum += ptr[i]; 265 sum += ptr[i];
271 266
272 return ((sum == 0) && (len > 0)); 267 return ((sum == 0) && (len > 0));
273 } 268 }
274 269
275 /* 270 /*
276 * bios32_present 271 * bios32_present
277 * 272 *
278 * Routine Description: 273 * Routine Description:
279 * This function finds the 32-bit BIOS Se 274 * This function finds the 32-bit BIOS Service Directory
280 * 275 *
281 * Return Value: 276 * Return Value:
282 * 0 : SUCCESS 277 * 0 : SUCCESS
283 * <0 : FAILURE 278 * <0 : FAILURE
284 */ 279 */
285 static int __devinit bios32_present(const char 280 static int __devinit bios32_present(const char __iomem *p)
286 { 281 {
287 struct bios32_service_dir *bios_32_ptr 282 struct bios32_service_dir *bios_32_ptr;
288 int length; 283 int length;
289 unsigned long map_entry, map_offset; 284 unsigned long map_entry, map_offset;
290 285
291 bios_32_ptr = (struct bios32_service_d 286 bios_32_ptr = (struct bios32_service_dir *) p;
292 287
293 /* 288 /*
294 * Search for signature by checking eq 289 * Search for signature by checking equal to the swizzled value
295 * instead of calling another routine 290 * instead of calling another routine to perform a strcmp.
296 */ 291 */
297 if (bios_32_ptr->signature == PCI_BIOS 292 if (bios_32_ptr->signature == PCI_BIOS32_SD_VALUE) {
298 length = bios_32_ptr->length * 293 length = bios_32_ptr->length * PCI_BIOS32_PARAGRAPH_LEN;
299 if (bios_checksum(p, length)) 294 if (bios_checksum(p, length)) {
300 /* 295 /*
301 * According to the sp 296 * According to the spec, we're looking for the
302 * first 4KB-aligned a 297 * first 4KB-aligned address below the entrypoint
303 * listed in the heade 298 * listed in the header. The Service Directory code
304 * is guaranteed to oc 299 * is guaranteed to occupy no more than 2 4KB pages.
305 */ 300 */
306 map_entry = bios_32_pt 301 map_entry = bios_32_ptr->entry_point & ~(PAGE_SIZE - 1);
307 map_offset = bios_32_p 302 map_offset = bios_32_ptr->entry_point - map_entry;
308 303
309 return cru_detect(map_ 304 return cru_detect(map_entry, map_offset);
310 } 305 }
311 } 306 }
312 return -ENODEV; 307 return -ENODEV;
313 } 308 }
314 309
315 static int __devinit detect_cru_service(void) 310 static int __devinit detect_cru_service(void)
316 { 311 {
317 char __iomem *p, *q; 312 char __iomem *p, *q;
318 int rc = -1; 313 int rc = -1;
319 314
320 /* 315 /*
321 * Search from 0x0f0000 through 0x0fff 316 * Search from 0x0f0000 through 0x0fffff, inclusive.
322 */ 317 */
323 p = ioremap(PCI_ROM_BASE1, ROM_SIZE); 318 p = ioremap(PCI_ROM_BASE1, ROM_SIZE);
324 if (p == NULL) 319 if (p == NULL)
325 return -ENOMEM; 320 return -ENOMEM;
326 321
327 for (q = p; q < p + ROM_SIZE; q += 16) 322 for (q = p; q < p + ROM_SIZE; q += 16) {
328 rc = bios32_present(q); 323 rc = bios32_present(q);
329 if (!rc) 324 if (!rc)
330 break; 325 break;
331 } 326 }
332 iounmap(p); 327 iounmap(p);
333 return rc; 328 return rc;
334 } 329 }
335 330
336 #else 331 #else
337 /* --64 Bit Bios------------------------------ 332 /* --64 Bit Bios------------------------------------------------------------ */
338 333
339 #define HPWDT_ARCH 64 334 #define HPWDT_ARCH 64
340 335
341 asm(".text \n\t" !! 336 static void asminline_call(struct cmn_registers *pi86Regs,
342 ".align 4 \n" !! 337 unsigned long *pRomEntry)
343 "asminline_call: \n\t" !! 338 {
344 "pushq %rbp \n\t" !! 339 asm("pushq %rbp \n\t"
345 "movq %rsp, %rbp \n\t" !! 340 "movq %rsp, %rbp \n\t"
346 "pushq %rax \n\t" !! 341 "pushq %rax \n\t"
347 "pushq %rbx \n\t" !! 342 "pushq %rbx \n\t"
348 "pushq %rdx \n\t" !! 343 "pushq %rdx \n\t"
349 "pushq %r12 \n\t" !! 344 "pushq %r12 \n\t"
350 "pushq %r9 \n\t" !! 345 "pushq %r9 \n\t"
351 "movq %rsi, %r12 \n\t" !! 346 "movq %rsi, %r12 \n\t"
352 "movq %rdi, %r9 \n\t" !! 347 "movq %rdi, %r9 \n\t"
353 "movl 4(%r9),%ebx \n\t" !! 348 "movl 4(%r9),%ebx \n\t"
354 "movl 8(%r9),%ecx \n\t" !! 349 "movl 8(%r9),%ecx \n\t"
355 "movl 12(%r9),%edx \n\t" !! 350 "movl 12(%r9),%edx \n\t"
356 "movl 16(%r9),%esi \n\t" !! 351 "movl 16(%r9),%esi \n\t"
357 "movl 20(%r9),%edi \n\t" !! 352 "movl 20(%r9),%edi \n\t"
358 "movl (%r9),%eax \n\t" !! 353 "movl (%r9),%eax \n\t"
359 "call *%r12 \n\t" !! 354 "call *%r12 \n\t"
360 "pushfq \n\t" !! 355 "pushfq \n\t"
361 "popq %r12 \n\t" !! 356 "popq %r12 \n\t"
362 "movl %eax, (%r9) \n\t" !! 357 "popfq \n\t"
363 "movl %ebx, 4(%r9) \n\t" !! 358 "movl %eax, (%r9) \n\t"
364 "movl %ecx, 8(%r9) \n\t" !! 359 "movl %ebx, 4(%r9) \n\t"
365 "movl %edx, 12(%r9) \n\t" !! 360 "movl %ecx, 8(%r9) \n\t"
366 "movl %esi, 16(%r9) \n\t" !! 361 "movl %edx, 12(%r9) \n\t"
367 "movl %edi, 20(%r9) \n\t" !! 362 "movl %esi, 16(%r9) \n\t"
368 "movq %r12, %rax \n\t" !! 363 "movl %edi, 20(%r9) \n\t"
369 "movl %eax, 28(%r9) \n\t" !! 364 "movq %r12, %rax \n\t"
370 "popq %r9 \n\t" !! 365 "movl %eax, 28(%r9) \n\t"
371 "popq %r12 \n\t" !! 366 "popq %r9 \n\t"
372 "popq %rdx \n\t" !! 367 "popq %r12 \n\t"
373 "popq %rbx \n\t" !! 368 "popq %rdx \n\t"
374 "popq %rax \n\t" !! 369 "popq %rbx \n\t"
375 "leave \n\t" !! 370 "popq %rax \n\t"
376 "ret \n\t" !! 371 "leave \n\t" "ret");
377 ".previous"); !! 372 }
378 373
379 /* 374 /*
380 * dmi_find_cru 375 * dmi_find_cru
381 * 376 *
382 * Routine Description: 377 * Routine Description:
383 * This function checks whether or not a 378 * This function checks whether or not a SMBIOS/DMI record is
384 * the 64bit CRU info or not 379 * the 64bit CRU info or not
385 */ 380 */
386 static void __devinit dmi_find_cru(const struc !! 381 static void __devinit dmi_find_cru(const struct dmi_header *dm)
387 { 382 {
388 struct smbios_cru64_info *smbios_cru64 383 struct smbios_cru64_info *smbios_cru64_ptr;
389 unsigned long cru_physical_address; 384 unsigned long cru_physical_address;
390 385
391 if (dm->type == SMBIOS_CRU64_INFORMATI 386 if (dm->type == SMBIOS_CRU64_INFORMATION) {
392 smbios_cru64_ptr = (struct smb 387 smbios_cru64_ptr = (struct smbios_cru64_info *) dm;
393 if (smbios_cru64_ptr->signatur 388 if (smbios_cru64_ptr->signature == CRU_BIOS_SIGNATURE_VALUE) {
394 cru_physical_address = 389 cru_physical_address =
395 smbios_cru64_p !! 390 smbios_cru64_ptr->physical_address +
396 smbios_cru64_p !! 391 smbios_cru64_ptr->double_offset;
397 cru_rom_addr = ioremap 392 cru_rom_addr = ioremap(cru_physical_address,
398 smbios_cru64_p !! 393 smbios_cru64_ptr->double_length);
399 set_memory_x((unsigned <<
400 smbios_cru64_p <<
401 } 394 }
402 } 395 }
403 } 396 }
404 397
405 static int __devinit detect_cru_service(void) 398 static int __devinit detect_cru_service(void)
406 { 399 {
407 cru_rom_addr = NULL; 400 cru_rom_addr = NULL;
408 401
409 dmi_walk(dmi_find_cru, NULL); !! 402 dmi_walk(dmi_find_cru);
410 403
411 /* if cru_rom_addr has been set then w 404 /* if cru_rom_addr has been set then we found a CRU service */
412 return ((cru_rom_addr != NULL) ? 0 : - !! 405 return ((cru_rom_addr != NULL)? 0: -ENODEV);
413 } 406 }
414 407
415 /* ------------------------------------------- 408 /* ------------------------------------------------------------------------- */
416 409
417 #endif 410 #endif
418 411
419 /* 412 /*
>> 413 * NMI Handler
>> 414 */
>> 415 static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
>> 416 void *data)
>> 417 {
>> 418 static unsigned long rom_pl;
>> 419 static int die_nmi_called;
>> 420
>> 421 if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)
>> 422 return NOTIFY_OK;
>> 423
>> 424 spin_lock_irqsave(&rom_lock, rom_pl);
>> 425 if (!die_nmi_called)
>> 426 asminline_call(&cmn_regs, cru_rom_addr);
>> 427 die_nmi_called = 1;
>> 428 spin_unlock_irqrestore(&rom_lock, rom_pl);
>> 429 if (cmn_regs.u1.ral == 0) {
>> 430 printk(KERN_WARNING "hpwdt: An NMI occurred, "
>> 431 "but unable to determine source.\n");
>> 432 } else {
>> 433 panic("An NMI occurred, please see the Integrated "
>> 434 "Management Log for details.\n");
>> 435 }
>> 436
>> 437 return NOTIFY_STOP;
>> 438 }
>> 439
>> 440 /*
420 * Watchdog operations 441 * Watchdog operations
421 */ 442 */
422 static void hpwdt_start(void) 443 static void hpwdt_start(void)
423 { 444 {
424 reload = (soft_margin * 1000) / 128; 445 reload = (soft_margin * 1000) / 128;
425 iowrite16(reload, hpwdt_timer_reg); 446 iowrite16(reload, hpwdt_timer_reg);
426 iowrite16(0x85, hpwdt_timer_con); 447 iowrite16(0x85, hpwdt_timer_con);
427 } 448 }
428 449
429 static void hpwdt_stop(void) 450 static void hpwdt_stop(void)
430 { 451 {
431 unsigned long data; 452 unsigned long data;
432 453
433 data = ioread16(hpwdt_timer_con); 454 data = ioread16(hpwdt_timer_con);
434 data &= 0xFE; 455 data &= 0xFE;
435 iowrite16(data, hpwdt_timer_con); 456 iowrite16(data, hpwdt_timer_con);
436 } 457 }
437 458
438 static void hpwdt_ping(void) 459 static void hpwdt_ping(void)
439 { 460 {
440 iowrite16(reload, hpwdt_timer_reg); 461 iowrite16(reload, hpwdt_timer_reg);
441 } 462 }
442 463
443 static int hpwdt_change_timer(int new_margin) 464 static int hpwdt_change_timer(int new_margin)
444 { 465 {
445 /* Arbitrary, can't find the card's li 466 /* Arbitrary, can't find the card's limits */
446 if (new_margin < 30 || new_margin > 60 467 if (new_margin < 30 || new_margin > 600) {
447 printk(KERN_WARNING 468 printk(KERN_WARNING
448 "hpwdt: New value pass 469 "hpwdt: New value passed in is invalid: %d seconds.\n",
449 new_margin); 470 new_margin);
450 return -EINVAL; 471 return -EINVAL;
451 } 472 }
452 473
453 soft_margin = new_margin; 474 soft_margin = new_margin;
454 printk(KERN_DEBUG 475 printk(KERN_DEBUG
455 "hpwdt: New timer passed in is 476 "hpwdt: New timer passed in is %d seconds.\n",
456 new_margin); 477 new_margin);
457 reload = (soft_margin * 1000) / 128; 478 reload = (soft_margin * 1000) / 128;
458 479
459 return 0; 480 return 0;
460 } 481 }
461 482
462 /* 483 /*
463 * NMI Handler <<
464 */ <<
465 static int hpwdt_pretimeout(struct notifier_bl <<
466 void *data) <<
467 { <<
468 unsigned long rom_pl; <<
469 static int die_nmi_called; <<
470 <<
471 if (ulReason != DIE_NMI && ulReason != <<
472 return NOTIFY_OK; <<
473 <<
474 if (hpwdt_nmi_sourcing) { <<
475 spin_lock_irqsave(&rom_lock, r <<
476 if (!die_nmi_called) <<
477 asminline_call(&cmn_re <<
478 die_nmi_called = 1; <<
479 spin_unlock_irqrestore(&rom_lo <<
480 if (cmn_regs.u1.ral == 0) { <<
481 printk(KERN_WARNING "h <<
482 "but unable to <<
483 } else { <<
484 if (allow_kdump) <<
485 hpwdt_stop(); <<
486 panic("An NMI occurred <<
487 "Management Lo <<
488 } <<
489 } <<
490 return NOTIFY_OK; <<
491 } <<
492 <<
493 /* <<
494 * /dev/watchdog handling 484 * /dev/watchdog handling
495 */ 485 */
496 static int hpwdt_open(struct inode *inode, str 486 static int hpwdt_open(struct inode *inode, struct file *file)
497 { 487 {
498 /* /dev/watchdog can only be opened on 488 /* /dev/watchdog can only be opened once */
499 if (test_and_set_bit(0, &hpwdt_is_open 489 if (test_and_set_bit(0, &hpwdt_is_open))
500 return -EBUSY; 490 return -EBUSY;
501 491
502 /* Start the watchdog */ 492 /* Start the watchdog */
503 hpwdt_start(); 493 hpwdt_start();
504 hpwdt_ping(); 494 hpwdt_ping();
505 495
506 return nonseekable_open(inode, file); 496 return nonseekable_open(inode, file);
507 } 497 }
508 498
509 static int hpwdt_release(struct inode *inode, 499 static int hpwdt_release(struct inode *inode, struct file *file)
510 { 500 {
511 /* Stop the watchdog */ 501 /* Stop the watchdog */
512 if (expect_release == 42) { 502 if (expect_release == 42) {
513 hpwdt_stop(); 503 hpwdt_stop();
514 } else { 504 } else {
515 printk(KERN_CRIT 505 printk(KERN_CRIT
516 "hpwdt: Unexpected clo 506 "hpwdt: Unexpected close, not stopping watchdog!\n");
517 hpwdt_ping(); 507 hpwdt_ping();
518 } 508 }
519 509
520 expect_release = 0; 510 expect_release = 0;
521 511
522 /* /dev/watchdog is being closed, make 512 /* /dev/watchdog is being closed, make sure it can be re-opened */
523 clear_bit(0, &hpwdt_is_open); 513 clear_bit(0, &hpwdt_is_open);
524 514
525 return 0; 515 return 0;
526 } 516 }
527 517
528 static ssize_t hpwdt_write(struct file *file, 518 static ssize_t hpwdt_write(struct file *file, const char __user *data,
529 size_t len, loff_t *ppos) 519 size_t len, loff_t *ppos)
530 { 520 {
531 /* See if we got the magic character ' 521 /* See if we got the magic character 'V' and reload the timer */
532 if (len) { 522 if (len) {
533 if (!nowayout) { 523 if (!nowayout) {
534 size_t i; 524 size_t i;
535 525
536 /* note: just in case 526 /* note: just in case someone wrote the magic character
537 * five months ago... 527 * five months ago... */
538 expect_release = 0; 528 expect_release = 0;
539 529
540 /* scan to see whether 530 /* scan to see whether or not we got the magic char. */
541 for (i = 0; i != len; 531 for (i = 0; i != len; i++) {
542 char c; 532 char c;
543 if (get_user(c !! 533 if (get_user(c, data+i))
544 return 534 return -EFAULT;
545 if (c == 'V') 535 if (c == 'V')
546 expect 536 expect_release = 42;
547 } 537 }
548 } 538 }
549 539
550 /* someone wrote to us, we sho 540 /* someone wrote to us, we should reload the timer */
551 hpwdt_ping(); 541 hpwdt_ping();
552 } 542 }
553 543
554 return len; 544 return len;
555 } 545 }
556 546
557 static struct watchdog_info ident = { 547 static struct watchdog_info ident = {
558 .options = WDIOF_SETTIMEOUT | 548 .options = WDIOF_SETTIMEOUT |
559 WDIOF_KEEPALIVEPING | 549 WDIOF_KEEPALIVEPING |
560 WDIOF_MAGICCLOSE, 550 WDIOF_MAGICCLOSE,
561 .identity = "HP iLO2 HW Watchdog Timer 551 .identity = "HP iLO2 HW Watchdog Timer",
562 }; 552 };
563 553
564 static long hpwdt_ioctl(struct file *file, uns 554 static long hpwdt_ioctl(struct file *file, unsigned int cmd,
565 unsigned long arg) 555 unsigned long arg)
566 { 556 {
567 void __user *argp = (void __user *)arg 557 void __user *argp = (void __user *)arg;
568 int __user *p = argp; 558 int __user *p = argp;
569 int new_margin; 559 int new_margin;
570 int ret = -ENOTTY; 560 int ret = -ENOTTY;
571 561
572 switch (cmd) { 562 switch (cmd) {
573 case WDIOC_GETSUPPORT: 563 case WDIOC_GETSUPPORT:
574 ret = 0; 564 ret = 0;
575 if (copy_to_user(argp, &ident, 565 if (copy_to_user(argp, &ident, sizeof(ident)))
576 ret = -EFAULT; 566 ret = -EFAULT;
577 break; 567 break;
578 568
579 case WDIOC_GETSTATUS: 569 case WDIOC_GETSTATUS:
580 case WDIOC_GETBOOTSTATUS: 570 case WDIOC_GETBOOTSTATUS:
581 ret = put_user(0, p); 571 ret = put_user(0, p);
582 break; 572 break;
583 573
584 case WDIOC_KEEPALIVE: 574 case WDIOC_KEEPALIVE:
585 hpwdt_ping(); 575 hpwdt_ping();
586 ret = 0; 576 ret = 0;
587 break; 577 break;
588 578
589 case WDIOC_SETTIMEOUT: 579 case WDIOC_SETTIMEOUT:
590 ret = get_user(new_margin, p); 580 ret = get_user(new_margin, p);
591 if (ret) 581 if (ret)
592 break; 582 break;
593 583
594 ret = hpwdt_change_timer(new_m 584 ret = hpwdt_change_timer(new_margin);
595 if (ret) 585 if (ret)
596 break; 586 break;
597 587
598 hpwdt_ping(); 588 hpwdt_ping();
599 /* Fall */ 589 /* Fall */
600 case WDIOC_GETTIMEOUT: 590 case WDIOC_GETTIMEOUT:
601 ret = put_user(soft_margin, p) 591 ret = put_user(soft_margin, p);
602 break; 592 break;
603 } 593 }
604 return ret; 594 return ret;
605 } 595 }
606 596
607 /* 597 /*
608 * Kernel interfaces 598 * Kernel interfaces
609 */ 599 */
610 static const struct file_operations hpwdt_fops !! 600 static struct file_operations hpwdt_fops = {
611 .owner = THIS_MODULE, 601 .owner = THIS_MODULE,
612 .llseek = no_llseek, 602 .llseek = no_llseek,
613 .write = hpwdt_write, 603 .write = hpwdt_write,
614 .unlocked_ioctl = hpwdt_ioctl, 604 .unlocked_ioctl = hpwdt_ioctl,
615 .open = hpwdt_open, 605 .open = hpwdt_open,
616 .release = hpwdt_release, 606 .release = hpwdt_release,
617 }; 607 };
618 608
619 static struct miscdevice hpwdt_miscdev = { 609 static struct miscdevice hpwdt_miscdev = {
620 .minor = WATCHDOG_MINOR, 610 .minor = WATCHDOG_MINOR,
621 .name = "watchdog", 611 .name = "watchdog",
622 .fops = &hpwdt_fops, 612 .fops = &hpwdt_fops,
623 }; 613 };
624 614
625 static struct notifier_block die_notifier = { 615 static struct notifier_block die_notifier = {
626 .notifier_call = hpwdt_pretimeout, 616 .notifier_call = hpwdt_pretimeout,
627 .priority = 0, !! 617 .priority = 0x7FFFFFFF,
628 }; 618 };
629 619
630 /* 620 /*
631 * Init & Exit 621 * Init & Exit
632 */ 622 */
633 623
634 #ifdef ARCH_HAS_NMI_WATCHDOG <<
635 static void __devinit hpwdt_check_nmi_sourcing <<
636 { <<
637 /* <<
638 * If nmi_watchdog is turned off then <<
639 * our nmi sourcing capability. <<
640 */ <<
641 if (!nmi_watchdog_active()) <<
642 hpwdt_nmi_sourcing = 1; <<
643 else <<
644 dev_warn(&dev->dev, "NMI sourc <<
645 "functionality you mus <<
646 "and load the hpwdt dr <<
647 } <<
648 #else <<
649 static void __devinit hpwdt_check_nmi_sourcing <<
650 { <<
651 dev_warn(&dev->dev, "NMI sourcing is d <<
652 "Your kernel does not support <<
653 } <<
654 #endif <<
655 <<
656 static int __devinit hpwdt_init_one(struct pci 624 static int __devinit hpwdt_init_one(struct pci_dev *dev,
657 const !! 625 const struct pci_device_id *ent)
658 { 626 {
659 int retval; 627 int retval;
660 628
661 /* 629 /*
662 * Check if we can do NMI sourcing or <<
663 */ <<
664 hpwdt_check_nmi_sourcing(dev); <<
665 <<
666 /* <<
667 * First let's find out if we are on a 630 * First let's find out if we are on an iLO2 server. We will
668 * not run on a legacy ASM box. 631 * not run on a legacy ASM box.
669 * So we only support the G5 ProLiant <<
670 */ 632 */
671 if (dev->subsystem_vendor != PCI_VENDO 633 if (dev->subsystem_vendor != PCI_VENDOR_ID_HP) {
672 dev_warn(&dev->dev, 634 dev_warn(&dev->dev,
673 "This server does not !! 635 "This server does not have an iLO2 ASIC.\n");
674 return -ENODEV; 636 return -ENODEV;
675 } 637 }
676 638
677 if (pci_enable_device(dev)) { 639 if (pci_enable_device(dev)) {
678 dev_warn(&dev->dev, 640 dev_warn(&dev->dev,
679 "Not possible to enabl 641 "Not possible to enable PCI Device: 0x%x:0x%x.\n",
680 ent->vendor, ent->devi 642 ent->vendor, ent->device);
681 return -ENODEV; 643 return -ENODEV;
682 } 644 }
683 645
684 pci_mem_addr = pci_iomap(dev, 1, 0x80) 646 pci_mem_addr = pci_iomap(dev, 1, 0x80);
685 if (!pci_mem_addr) { 647 if (!pci_mem_addr) {
686 dev_warn(&dev->dev, 648 dev_warn(&dev->dev,
687 "Unable to detect the 649 "Unable to detect the iLO2 server memory.\n");
688 retval = -ENOMEM; 650 retval = -ENOMEM;
689 goto error_pci_iomap; 651 goto error_pci_iomap;
690 } 652 }
691 hpwdt_timer_reg = pci_mem_addr + 0x70; 653 hpwdt_timer_reg = pci_mem_addr + 0x70;
692 hpwdt_timer_con = pci_mem_addr + 0x72; 654 hpwdt_timer_con = pci_mem_addr + 0x72;
693 655
694 /* Make sure that we have a valid soft 656 /* Make sure that we have a valid soft_margin */
695 if (hpwdt_change_timer(soft_margin)) 657 if (hpwdt_change_timer(soft_margin))
696 hpwdt_change_timer(DEFAULT_MAR 658 hpwdt_change_timer(DEFAULT_MARGIN);
697 659
698 /* 660 /*
699 * We need to map the ROM to get the C 661 * We need to map the ROM to get the CRU service.
700 * For 32 bit Operating Systems we nee 662 * For 32 bit Operating Systems we need to go through the 32 Bit
701 * BIOS Service Directory 663 * BIOS Service Directory
702 * For 64 bit Operating Systems we get 664 * For 64 bit Operating Systems we get that service through SMBIOS.
703 */ 665 */
704 retval = detect_cru_service(); 666 retval = detect_cru_service();
705 if (retval < 0) { 667 if (retval < 0) {
706 dev_warn(&dev->dev, 668 dev_warn(&dev->dev,
707 "Unable to detect the !! 669 "Unable to detect the %d Bit CRU Service.\n",
708 HPWDT_ARCH); 670 HPWDT_ARCH);
709 goto error_get_cru; 671 goto error_get_cru;
710 } 672 }
711 673
712 /* 674 /*
713 * We know this is the only CRU call w 675 * We know this is the only CRU call we need to make so lets keep as
714 * few instructions as possible once t 676 * few instructions as possible once the NMI comes in.
715 */ 677 */
716 cmn_regs.u1.rah = 0x0D; 678 cmn_regs.u1.rah = 0x0D;
717 cmn_regs.u1.ral = 0x02; 679 cmn_regs.u1.ral = 0x02;
718 680
719 /* <<
720 * If the priority is set to 1, then w <<
721 * die notify list to handle a critica <<
722 * be last so other users of the NMI s <<
723 */ <<
724 if (priority) <<
725 die_notifier.priority = 0x7FFF <<
726 <<
727 retval = register_die_notifier(&die_no 681 retval = register_die_notifier(&die_notifier);
728 if (retval != 0) { 682 if (retval != 0) {
729 dev_warn(&dev->dev, 683 dev_warn(&dev->dev,
730 "Unable to register a !! 684 "Unable to register a die notifier (err=%d).\n",
731 retval); 685 retval);
732 goto error_die_notifier; 686 goto error_die_notifier;
733 } 687 }
734 688
735 retval = misc_register(&hpwdt_miscdev) 689 retval = misc_register(&hpwdt_miscdev);
736 if (retval < 0) { 690 if (retval < 0) {
737 dev_warn(&dev->dev, 691 dev_warn(&dev->dev,
738 "Unable to register mi 692 "Unable to register miscdev on minor=%d (err=%d).\n",
739 WATCHDOG_MINOR, retval 693 WATCHDOG_MINOR, retval);
740 goto error_misc_register; 694 goto error_misc_register;
741 } 695 }
742 696
743 printk(KERN_INFO 697 printk(KERN_INFO
744 "hp Watchdog Timer Driver: %s" !! 698 "hp Watchdog Timer Driver: 1.00"
745 ", timer margin: %d seconds (n !! 699 ", timer margin: %d seconds( nowayout=%d).\n",
746 ", allow kernel dump: %s (defa !! 700 soft_margin, nowayout);
747 ", priority: %s (default = 0/L <<
748 HPWDT_VERSION, soft_margin, no <<
749 (allow_kdump == 0) ? "OFF" : " <<
750 (priority == 0) ? "LAST" : "FI <<
751 701
752 return 0; 702 return 0;
753 703
754 error_misc_register: 704 error_misc_register:
755 unregister_die_notifier(&die_notifier) 705 unregister_die_notifier(&die_notifier);
756 error_die_notifier: 706 error_die_notifier:
757 if (cru_rom_addr) 707 if (cru_rom_addr)
758 iounmap(cru_rom_addr); 708 iounmap(cru_rom_addr);
759 error_get_cru: 709 error_get_cru:
760 pci_iounmap(dev, pci_mem_addr); 710 pci_iounmap(dev, pci_mem_addr);
761 error_pci_iomap: 711 error_pci_iomap:
762 pci_disable_device(dev); 712 pci_disable_device(dev);
763 return retval; 713 return retval;
764 } 714 }
765 715
766 static void __devexit hpwdt_exit(struct pci_de 716 static void __devexit hpwdt_exit(struct pci_dev *dev)
767 { 717 {
768 if (!nowayout) 718 if (!nowayout)
769 hpwdt_stop(); 719 hpwdt_stop();
770 720
771 misc_deregister(&hpwdt_miscdev); 721 misc_deregister(&hpwdt_miscdev);
772 unregister_die_notifier(&die_notifier) 722 unregister_die_notifier(&die_notifier);
773 723
774 if (cru_rom_addr) 724 if (cru_rom_addr)
775 iounmap(cru_rom_addr); 725 iounmap(cru_rom_addr);
776 pci_iounmap(dev, pci_mem_addr); 726 pci_iounmap(dev, pci_mem_addr);
777 pci_disable_device(dev); 727 pci_disable_device(dev);
778 } 728 }
779 729
780 static struct pci_driver hpwdt_driver = { 730 static struct pci_driver hpwdt_driver = {
781 .name = "hpwdt", 731 .name = "hpwdt",
782 .id_table = hpwdt_devices, 732 .id_table = hpwdt_devices,
783 .probe = hpwdt_init_one, 733 .probe = hpwdt_init_one,
784 .remove = __devexit_p(hpwdt_exit), 734 .remove = __devexit_p(hpwdt_exit),
785 }; 735 };
786 736
787 static void __exit hpwdt_cleanup(void) 737 static void __exit hpwdt_cleanup(void)
788 { 738 {
789 pci_unregister_driver(&hpwdt_driver); 739 pci_unregister_driver(&hpwdt_driver);
790 } 740 }
791 741
792 static int __init hpwdt_init(void) 742 static int __init hpwdt_init(void)
793 { 743 {
794 return pci_register_driver(&hpwdt_driv 744 return pci_register_driver(&hpwdt_driver);
795 } 745 }
796 746
797 MODULE_AUTHOR("Tom Mingarelli"); 747 MODULE_AUTHOR("Tom Mingarelli");
798 MODULE_DESCRIPTION("hp watchdog driver"); 748 MODULE_DESCRIPTION("hp watchdog driver");
799 MODULE_LICENSE("GPL"); 749 MODULE_LICENSE("GPL");
800 MODULE_VERSION(HPWDT_VERSION); <<
801 MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); 750 MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
802 751
803 module_param(soft_margin, int, 0); 752 module_param(soft_margin, int, 0);
804 MODULE_PARM_DESC(soft_margin, "Watchdog timeou 753 MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");
805 754
806 module_param(allow_kdump, int, 0); <<
807 MODULE_PARM_DESC(allow_kdump, "Start a kernel <<
808 <<
809 module_param(nowayout, int, 0); 755 module_param(nowayout, int, 0);
810 MODULE_PARM_DESC(nowayout, "Watchdog cannot be 756 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
811 __MODULE_STRING(WATCHDOG_NOWAY 757 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
812 758
813 module_param(priority, int, 0); <<
814 MODULE_PARM_DESC(priority, "The hpwdt driver h <<
815 " (default = 0/Last)\n"); <<
816 <<
817 module_init(hpwdt_init); 759 module_init(hpwdt_init);
818 module_exit(hpwdt_cleanup); 760 module_exit(hpwdt_cleanup);
819 761
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