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0caa8cdf | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Base infrastructure for Linux-z/VM Monitor Stream, Stage 1. |
4 | * Exports appldata_register_ops() and appldata_unregister_ops() for the | |
5 | * data gathering modules. | |
6 | * | |
524dbcda | 7 | * Copyright IBM Corp. 2003, 2009 |
1da177e4 | 8 | * |
5b5dd21a | 9 | * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com> |
1da177e4 LT |
10 | */ |
11 | ||
e7534b0e GS |
12 | #define KMSG_COMPONENT "appldata" |
13 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
14 | ||
1da177e4 | 15 | #include <linux/module.h> |
3605df49 | 16 | #include <linux/sched/stat.h> |
1da177e4 LT |
17 | #include <linux/init.h> |
18 | #include <linux/slab.h> | |
19 | #include <linux/errno.h> | |
1da177e4 LT |
20 | #include <linux/interrupt.h> |
21 | #include <linux/proc_fs.h> | |
2dcea57a | 22 | #include <linux/mm.h> |
1da177e4 LT |
23 | #include <linux/swap.h> |
24 | #include <linux/pagemap.h> | |
25 | #include <linux/sysctl.h> | |
1da177e4 LT |
26 | #include <linux/notifier.h> |
27 | #include <linux/cpu.h> | |
f26d583e | 28 | #include <linux/workqueue.h> |
524dbcda GS |
29 | #include <linux/suspend.h> |
30 | #include <linux/platform_device.h> | |
1f38d613 | 31 | #include <asm/appldata.h> |
27f6b416 | 32 | #include <asm/vtimer.h> |
7c0f6ba6 | 33 | #include <linux/uaccess.h> |
1f38d613 GS |
34 | #include <asm/io.h> |
35 | #include <asm/smp.h> | |
1da177e4 LT |
36 | |
37 | #include "appldata.h" | |
38 | ||
39 | ||
1da177e4 LT |
40 | #define APPLDATA_CPU_INTERVAL 10000 /* default (CPU) time for |
41 | sampling interval in | |
42 | milliseconds */ | |
43 | ||
44 | #define TOD_MICRO 0x01000 /* nr. of TOD clock units | |
45 | for 1 microsecond */ | |
524dbcda GS |
46 | |
47 | static struct platform_device *appldata_pdev; | |
48 | ||
1da177e4 LT |
49 | /* |
50 | * /proc entries (sysctl) | |
51 | */ | |
52 | static const char appldata_proc_name[APPLDATA_PROC_NAME_LENGTH] = "appldata"; | |
302bfe20 | 53 | static int appldata_timer_handler(struct ctl_table *ctl, int write, |
1da177e4 | 54 | void __user *buffer, size_t *lenp, loff_t *ppos); |
302bfe20 | 55 | static int appldata_interval_handler(struct ctl_table *ctl, int write, |
1da177e4 LT |
56 | void __user *buffer, |
57 | size_t *lenp, loff_t *ppos); | |
58 | ||
59 | static struct ctl_table_header *appldata_sysctl_header; | |
60 | static struct ctl_table appldata_table[] = { | |
61 | { | |
1da177e4 LT |
62 | .procname = "timer", |
63 | .mode = S_IRUGO | S_IWUSR, | |
6d456111 | 64 | .proc_handler = appldata_timer_handler, |
1da177e4 LT |
65 | }, |
66 | { | |
1da177e4 LT |
67 | .procname = "interval", |
68 | .mode = S_IRUGO | S_IWUSR, | |
6d456111 | 69 | .proc_handler = appldata_interval_handler, |
1da177e4 | 70 | }, |
37e3a6ac | 71 | { }, |
1da177e4 LT |
72 | }; |
73 | ||
74 | static struct ctl_table appldata_dir_table[] = { | |
75 | { | |
1da177e4 LT |
76 | .procname = appldata_proc_name, |
77 | .maxlen = 0, | |
78 | .mode = S_IRUGO | S_IXUGO, | |
79 | .child = appldata_table, | |
80 | }, | |
37e3a6ac | 81 | { }, |
1da177e4 LT |
82 | }; |
83 | ||
84 | /* | |
85 | * Timer | |
86 | */ | |
27f6b416 | 87 | static struct vtimer_list appldata_timer; |
1da177e4 LT |
88 | |
89 | static DEFINE_SPINLOCK(appldata_timer_lock); | |
90 | static int appldata_interval = APPLDATA_CPU_INTERVAL; | |
91 | static int appldata_timer_active; | |
524dbcda | 92 | static int appldata_timer_suspended = 0; |
1da177e4 LT |
93 | |
94 | /* | |
f26d583e | 95 | * Work queue |
1da177e4 | 96 | */ |
f26d583e | 97 | static struct workqueue_struct *appldata_wq; |
6d5aefb8 DH |
98 | static void appldata_work_fn(struct work_struct *work); |
99 | static DECLARE_WORK(appldata_work, appldata_work_fn); | |
f26d583e | 100 | |
1da177e4 LT |
101 | |
102 | /* | |
103 | * Ops list | |
104 | */ | |
b1ad171e | 105 | static DEFINE_MUTEX(appldata_ops_mutex); |
1da177e4 LT |
106 | static LIST_HEAD(appldata_ops_list); |
107 | ||
108 | ||
f26d583e | 109 | /*************************** timer, work, DIAG *******************************/ |
1da177e4 LT |
110 | /* |
111 | * appldata_timer_function() | |
112 | * | |
f26d583e | 113 | * schedule work and reschedule timer |
1da177e4 | 114 | */ |
9d0a57cb | 115 | static void appldata_timer_function(unsigned long data) |
1da177e4 | 116 | { |
27f6b416 | 117 | queue_work(appldata_wq, (struct work_struct *) data); |
1da177e4 LT |
118 | } |
119 | ||
120 | /* | |
f26d583e | 121 | * appldata_work_fn() |
1da177e4 LT |
122 | * |
123 | * call data gathering function for each (active) module | |
124 | */ | |
6d5aefb8 | 125 | static void appldata_work_fn(struct work_struct *work) |
1da177e4 LT |
126 | { |
127 | struct list_head *lh; | |
128 | struct appldata_ops *ops; | |
1da177e4 | 129 | |
b1ad171e | 130 | mutex_lock(&appldata_ops_mutex); |
1da177e4 LT |
131 | list_for_each(lh, &appldata_ops_list) { |
132 | ops = list_entry(lh, struct appldata_ops, list); | |
1da177e4 LT |
133 | if (ops->active == 1) { |
134 | ops->callback(ops->data); | |
135 | } | |
136 | } | |
b1ad171e | 137 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
138 | } |
139 | ||
140 | /* | |
141 | * appldata_diag() | |
142 | * | |
143 | * prepare parameter list, issue DIAG 0xDC | |
144 | */ | |
5b5dd21a GS |
145 | int appldata_diag(char record_nr, u16 function, unsigned long buffer, |
146 | u16 length, char *mod_lvl) | |
1da177e4 | 147 | { |
1f38d613 | 148 | struct appldata_product_id id = { |
1da177e4 | 149 | .prod_nr = {0xD3, 0xC9, 0xD5, 0xE4, |
1f38d613 GS |
150 | 0xE7, 0xD2, 0xD9}, /* "LINUXKR" */ |
151 | .prod_fn = 0xD5D3, /* "NL" */ | |
1f38d613 GS |
152 | .version_nr = 0xF2F6, /* "26" */ |
153 | .release_nr = 0xF0F1, /* "01" */ | |
1da177e4 LT |
154 | }; |
155 | ||
925afbd6 GS |
156 | id.record_nr = record_nr; |
157 | id.mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1]; | |
1f38d613 | 158 | return appldata_asm(&id, function, (void *) buffer, length); |
1da177e4 | 159 | } |
f26d583e | 160 | /************************ timer, work, DIAG <END> ****************************/ |
1da177e4 LT |
161 | |
162 | ||
163 | /****************************** /proc stuff **********************************/ | |
164 | ||
1da177e4 LT |
165 | #define APPLDATA_ADD_TIMER 0 |
166 | #define APPLDATA_DEL_TIMER 1 | |
167 | #define APPLDATA_MOD_TIMER 2 | |
168 | ||
169 | /* | |
170 | * __appldata_vtimer_setup() | |
171 | * | |
172 | * Add, delete or modify virtual timers on all online cpus. | |
173 | * The caller needs to get the appldata_timer_lock spinlock. | |
174 | */ | |
27f6b416 | 175 | static void __appldata_vtimer_setup(int cmd) |
1da177e4 | 176 | { |
27f6b416 | 177 | u64 timer_interval = (u64) appldata_interval * 1000 * TOD_MICRO; |
1da177e4 LT |
178 | |
179 | switch (cmd) { | |
180 | case APPLDATA_ADD_TIMER: | |
181 | if (appldata_timer_active) | |
182 | break; | |
27f6b416 MS |
183 | appldata_timer.expires = timer_interval; |
184 | add_virt_timer_periodic(&appldata_timer); | |
1da177e4 | 185 | appldata_timer_active = 1; |
1da177e4 LT |
186 | break; |
187 | case APPLDATA_DEL_TIMER: | |
27f6b416 | 188 | del_virt_timer(&appldata_timer); |
1da177e4 LT |
189 | if (!appldata_timer_active) |
190 | break; | |
191 | appldata_timer_active = 0; | |
1da177e4 LT |
192 | break; |
193 | case APPLDATA_MOD_TIMER: | |
1da177e4 LT |
194 | if (!appldata_timer_active) |
195 | break; | |
27f6b416 | 196 | mod_virt_timer_periodic(&appldata_timer, timer_interval); |
1da177e4 LT |
197 | } |
198 | } | |
199 | ||
200 | /* | |
201 | * appldata_timer_handler() | |
202 | * | |
203 | * Start/Stop timer, show status of timer (0 = not active, 1 = active) | |
204 | */ | |
205 | static int | |
302bfe20 | 206 | appldata_timer_handler(struct ctl_table *ctl, int write, |
1da177e4 LT |
207 | void __user *buffer, size_t *lenp, loff_t *ppos) |
208 | { | |
57f47ba0 | 209 | unsigned int len; |
1da177e4 LT |
210 | char buf[2]; |
211 | ||
212 | if (!*lenp || *ppos) { | |
213 | *lenp = 0; | |
214 | return 0; | |
215 | } | |
216 | if (!write) { | |
d5b4c2f4 CG |
217 | strncpy(buf, appldata_timer_active ? "1\n" : "0\n", |
218 | ARRAY_SIZE(buf)); | |
219 | len = strnlen(buf, ARRAY_SIZE(buf)); | |
1da177e4 LT |
220 | if (len > *lenp) |
221 | len = *lenp; | |
222 | if (copy_to_user(buffer, buf, len)) | |
223 | return -EFAULT; | |
224 | goto out; | |
225 | } | |
226 | len = *lenp; | |
227 | if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len)) | |
228 | return -EFAULT; | |
229 | spin_lock(&appldata_timer_lock); | |
230 | if (buf[0] == '1') | |
231 | __appldata_vtimer_setup(APPLDATA_ADD_TIMER); | |
232 | else if (buf[0] == '0') | |
233 | __appldata_vtimer_setup(APPLDATA_DEL_TIMER); | |
234 | spin_unlock(&appldata_timer_lock); | |
235 | out: | |
236 | *lenp = len; | |
237 | *ppos += len; | |
238 | return 0; | |
239 | } | |
240 | ||
241 | /* | |
242 | * appldata_interval_handler() | |
243 | * | |
244 | * Set (CPU) timer interval for collection of data (in milliseconds), show | |
245 | * current timer interval. | |
246 | */ | |
247 | static int | |
302bfe20 | 248 | appldata_interval_handler(struct ctl_table *ctl, int write, |
1da177e4 LT |
249 | void __user *buffer, size_t *lenp, loff_t *ppos) |
250 | { | |
57f47ba0 HC |
251 | unsigned int len; |
252 | int interval; | |
1da177e4 LT |
253 | char buf[16]; |
254 | ||
255 | if (!*lenp || *ppos) { | |
256 | *lenp = 0; | |
257 | return 0; | |
258 | } | |
259 | if (!write) { | |
260 | len = sprintf(buf, "%i\n", appldata_interval); | |
261 | if (len > *lenp) | |
262 | len = *lenp; | |
263 | if (copy_to_user(buffer, buf, len)) | |
264 | return -EFAULT; | |
265 | goto out; | |
266 | } | |
267 | len = *lenp; | |
27f6b416 | 268 | if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len)) |
1da177e4 | 269 | return -EFAULT; |
95425f19 | 270 | interval = 0; |
1da177e4 | 271 | sscanf(buf, "%i", &interval); |
d3ae942d | 272 | if (interval <= 0) |
1da177e4 | 273 | return -EINVAL; |
1da177e4 LT |
274 | |
275 | spin_lock(&appldata_timer_lock); | |
276 | appldata_interval = interval; | |
277 | __appldata_vtimer_setup(APPLDATA_MOD_TIMER); | |
278 | spin_unlock(&appldata_timer_lock); | |
1da177e4 LT |
279 | out: |
280 | *lenp = len; | |
281 | *ppos += len; | |
282 | return 0; | |
283 | } | |
284 | ||
285 | /* | |
286 | * appldata_generic_handler() | |
287 | * | |
288 | * Generic start/stop monitoring and DIAG, show status of | |
289 | * monitoring (0 = not in process, 1 = in process) | |
290 | */ | |
291 | static int | |
302bfe20 | 292 | appldata_generic_handler(struct ctl_table *ctl, int write, |
1da177e4 LT |
293 | void __user *buffer, size_t *lenp, loff_t *ppos) |
294 | { | |
295 | struct appldata_ops *ops = NULL, *tmp_ops; | |
57f47ba0 HC |
296 | unsigned int len; |
297 | int rc, found; | |
1da177e4 LT |
298 | char buf[2]; |
299 | struct list_head *lh; | |
300 | ||
301 | found = 0; | |
b1ad171e | 302 | mutex_lock(&appldata_ops_mutex); |
1da177e4 LT |
303 | list_for_each(lh, &appldata_ops_list) { |
304 | tmp_ops = list_entry(lh, struct appldata_ops, list); | |
305 | if (&tmp_ops->ctl_table[2] == ctl) { | |
306 | found = 1; | |
307 | } | |
308 | } | |
309 | if (!found) { | |
b1ad171e | 310 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
311 | return -ENODEV; |
312 | } | |
313 | ops = ctl->data; | |
314 | if (!try_module_get(ops->owner)) { // protect this function | |
b1ad171e | 315 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
316 | return -ENODEV; |
317 | } | |
b1ad171e | 318 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
319 | |
320 | if (!*lenp || *ppos) { | |
321 | *lenp = 0; | |
322 | module_put(ops->owner); | |
323 | return 0; | |
324 | } | |
325 | if (!write) { | |
d5b4c2f4 CG |
326 | strncpy(buf, ops->active ? "1\n" : "0\n", ARRAY_SIZE(buf)); |
327 | len = strnlen(buf, ARRAY_SIZE(buf)); | |
1da177e4 LT |
328 | if (len > *lenp) |
329 | len = *lenp; | |
330 | if (copy_to_user(buffer, buf, len)) { | |
331 | module_put(ops->owner); | |
332 | return -EFAULT; | |
333 | } | |
334 | goto out; | |
335 | } | |
336 | len = *lenp; | |
337 | if (copy_from_user(buf, buffer, | |
338 | len > sizeof(buf) ? sizeof(buf) : len)) { | |
339 | module_put(ops->owner); | |
340 | return -EFAULT; | |
341 | } | |
342 | ||
b1ad171e | 343 | mutex_lock(&appldata_ops_mutex); |
1da177e4 | 344 | if ((buf[0] == '1') && (ops->active == 0)) { |
f26d583e GS |
345 | // protect work queue callback |
346 | if (!try_module_get(ops->owner)) { | |
b1ad171e | 347 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
348 | module_put(ops->owner); |
349 | return -ENODEV; | |
350 | } | |
1da177e4 LT |
351 | ops->callback(ops->data); // init record |
352 | rc = appldata_diag(ops->record_nr, | |
353 | APPLDATA_START_INTERVAL_REC, | |
5b5dd21a GS |
354 | (unsigned long) ops->data, ops->size, |
355 | ops->mod_lvl); | |
1da177e4 | 356 | if (rc != 0) { |
e7534b0e GS |
357 | pr_err("Starting the data collection for %s " |
358 | "failed with rc=%d\n", ops->name, rc); | |
1da177e4 | 359 | module_put(ops->owner); |
d3ae942d | 360 | } else |
5b5dd21a | 361 | ops->active = 1; |
1da177e4 LT |
362 | } else if ((buf[0] == '0') && (ops->active == 1)) { |
363 | ops->active = 0; | |
364 | rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC, | |
5b5dd21a GS |
365 | (unsigned long) ops->data, ops->size, |
366 | ops->mod_lvl); | |
d3ae942d | 367 | if (rc != 0) |
e7534b0e GS |
368 | pr_err("Stopping the data collection for %s " |
369 | "failed with rc=%d\n", ops->name, rc); | |
1da177e4 LT |
370 | module_put(ops->owner); |
371 | } | |
b1ad171e | 372 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
373 | out: |
374 | *lenp = len; | |
375 | *ppos += len; | |
376 | module_put(ops->owner); | |
377 | return 0; | |
378 | } | |
379 | ||
380 | /*************************** /proc stuff <END> *******************************/ | |
381 | ||
382 | ||
383 | /************************* module-ops management *****************************/ | |
384 | /* | |
385 | * appldata_register_ops() | |
386 | * | |
387 | * update ops list, register /proc/sys entries | |
388 | */ | |
389 | int appldata_register_ops(struct appldata_ops *ops) | |
390 | { | |
13f8b7c5 | 391 | if (ops->size > APPLDATA_MAX_REC_SIZE) |
37e3a6ac | 392 | return -EINVAL; |
1da177e4 | 393 | |
37e3a6ac HC |
394 | ops->ctl_table = kzalloc(4 * sizeof(struct ctl_table), GFP_KERNEL); |
395 | if (!ops->ctl_table) | |
1da177e4 | 396 | return -ENOMEM; |
1da177e4 | 397 | |
b1ad171e | 398 | mutex_lock(&appldata_ops_mutex); |
1da177e4 | 399 | list_add(&ops->list, &appldata_ops_list); |
b1ad171e | 400 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 | 401 | |
1da177e4 LT |
402 | ops->ctl_table[0].procname = appldata_proc_name; |
403 | ops->ctl_table[0].maxlen = 0; | |
404 | ops->ctl_table[0].mode = S_IRUGO | S_IXUGO; | |
405 | ops->ctl_table[0].child = &ops->ctl_table[2]; | |
406 | ||
1da177e4 LT |
407 | ops->ctl_table[2].procname = ops->name; |
408 | ops->ctl_table[2].mode = S_IRUGO | S_IWUSR; | |
409 | ops->ctl_table[2].proc_handler = appldata_generic_handler; | |
410 | ops->ctl_table[2].data = ops; | |
411 | ||
0b4d4147 | 412 | ops->sysctl_header = register_sysctl_table(ops->ctl_table); |
37e3a6ac HC |
413 | if (!ops->sysctl_header) |
414 | goto out; | |
1da177e4 | 415 | return 0; |
37e3a6ac | 416 | out: |
b1ad171e | 417 | mutex_lock(&appldata_ops_mutex); |
37e3a6ac | 418 | list_del(&ops->list); |
b1ad171e | 419 | mutex_unlock(&appldata_ops_mutex); |
37e3a6ac HC |
420 | kfree(ops->ctl_table); |
421 | return -ENOMEM; | |
1da177e4 LT |
422 | } |
423 | ||
424 | /* | |
425 | * appldata_unregister_ops() | |
426 | * | |
427 | * update ops list, unregister /proc entries, stop DIAG if necessary | |
428 | */ | |
429 | void appldata_unregister_ops(struct appldata_ops *ops) | |
430 | { | |
b1ad171e | 431 | mutex_lock(&appldata_ops_mutex); |
1da177e4 | 432 | list_del(&ops->list); |
b1ad171e | 433 | mutex_unlock(&appldata_ops_mutex); |
330d57fb | 434 | unregister_sysctl_table(ops->sysctl_header); |
37e3a6ac | 435 | kfree(ops->ctl_table); |
1da177e4 LT |
436 | } |
437 | /********************** module-ops management <END> **************************/ | |
438 | ||
439 | ||
524dbcda GS |
440 | /**************************** suspend / resume *******************************/ |
441 | static int appldata_freeze(struct device *dev) | |
442 | { | |
443 | struct appldata_ops *ops; | |
444 | int rc; | |
445 | struct list_head *lh; | |
446 | ||
524dbcda GS |
447 | spin_lock(&appldata_timer_lock); |
448 | if (appldata_timer_active) { | |
449 | __appldata_vtimer_setup(APPLDATA_DEL_TIMER); | |
450 | appldata_timer_suspended = 1; | |
451 | } | |
452 | spin_unlock(&appldata_timer_lock); | |
524dbcda GS |
453 | |
454 | mutex_lock(&appldata_ops_mutex); | |
455 | list_for_each(lh, &appldata_ops_list) { | |
456 | ops = list_entry(lh, struct appldata_ops, list); | |
457 | if (ops->active == 1) { | |
458 | rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC, | |
459 | (unsigned long) ops->data, ops->size, | |
460 | ops->mod_lvl); | |
461 | if (rc != 0) | |
462 | pr_err("Stopping the data collection for %s " | |
463 | "failed with rc=%d\n", ops->name, rc); | |
464 | } | |
465 | } | |
466 | mutex_unlock(&appldata_ops_mutex); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static int appldata_restore(struct device *dev) | |
471 | { | |
472 | struct appldata_ops *ops; | |
473 | int rc; | |
474 | struct list_head *lh; | |
475 | ||
524dbcda GS |
476 | spin_lock(&appldata_timer_lock); |
477 | if (appldata_timer_suspended) { | |
478 | __appldata_vtimer_setup(APPLDATA_ADD_TIMER); | |
479 | appldata_timer_suspended = 0; | |
480 | } | |
481 | spin_unlock(&appldata_timer_lock); | |
524dbcda GS |
482 | |
483 | mutex_lock(&appldata_ops_mutex); | |
484 | list_for_each(lh, &appldata_ops_list) { | |
485 | ops = list_entry(lh, struct appldata_ops, list); | |
486 | if (ops->active == 1) { | |
487 | ops->callback(ops->data); // init record | |
488 | rc = appldata_diag(ops->record_nr, | |
489 | APPLDATA_START_INTERVAL_REC, | |
490 | (unsigned long) ops->data, ops->size, | |
491 | ops->mod_lvl); | |
492 | if (rc != 0) { | |
493 | pr_err("Starting the data collection for %s " | |
494 | "failed with rc=%d\n", ops->name, rc); | |
495 | } | |
496 | } | |
497 | } | |
498 | mutex_unlock(&appldata_ops_mutex); | |
499 | return 0; | |
500 | } | |
501 | ||
502 | static int appldata_thaw(struct device *dev) | |
503 | { | |
504 | return appldata_restore(dev); | |
505 | } | |
506 | ||
47145210 | 507 | static const struct dev_pm_ops appldata_pm_ops = { |
524dbcda GS |
508 | .freeze = appldata_freeze, |
509 | .thaw = appldata_thaw, | |
510 | .restore = appldata_restore, | |
511 | }; | |
512 | ||
513 | static struct platform_driver appldata_pdrv = { | |
514 | .driver = { | |
515 | .name = "appldata", | |
524dbcda GS |
516 | .pm = &appldata_pm_ops, |
517 | }, | |
518 | }; | |
519 | /************************* suspend / resume <END> ****************************/ | |
520 | ||
521 | ||
1da177e4 LT |
522 | /******************************* init / exit *********************************/ |
523 | ||
1da177e4 LT |
524 | /* |
525 | * appldata_init() | |
526 | * | |
f26d583e | 527 | * init timer, register /proc entries |
1da177e4 LT |
528 | */ |
529 | static int __init appldata_init(void) | |
530 | { | |
27f6b416 MS |
531 | int rc; |
532 | ||
b7c5b1aa | 533 | init_virt_timer(&appldata_timer); |
27f6b416 MS |
534 | appldata_timer.function = appldata_timer_function; |
535 | appldata_timer.data = (unsigned long) &appldata_work; | |
524dbcda GS |
536 | |
537 | rc = platform_driver_register(&appldata_pdrv); | |
538 | if (rc) | |
539 | return rc; | |
1da177e4 | 540 | |
524dbcda GS |
541 | appldata_pdev = platform_device_register_simple("appldata", -1, NULL, |
542 | 0); | |
543 | if (IS_ERR(appldata_pdev)) { | |
544 | rc = PTR_ERR(appldata_pdev); | |
545 | goto out_driver; | |
546 | } | |
e68f1d4c | 547 | appldata_wq = alloc_ordered_workqueue("appldata", 0); |
524dbcda GS |
548 | if (!appldata_wq) { |
549 | rc = -ENOMEM; | |
550 | goto out_device; | |
551 | } | |
f26d583e | 552 | |
0b4d4147 | 553 | appldata_sysctl_header = register_sysctl_table(appldata_dir_table); |
1da177e4 | 554 | return 0; |
524dbcda GS |
555 | |
556 | out_device: | |
557 | platform_device_unregister(appldata_pdev); | |
558 | out_driver: | |
559 | platform_driver_unregister(&appldata_pdrv); | |
560 | return rc; | |
1da177e4 LT |
561 | } |
562 | ||
076fc808 | 563 | __initcall(appldata_init); |
1da177e4 | 564 | |
1da177e4 LT |
565 | /**************************** init / exit <END> ******************************/ |
566 | ||
1da177e4 LT |
567 | EXPORT_SYMBOL_GPL(appldata_register_ops); |
568 | EXPORT_SYMBOL_GPL(appldata_unregister_ops); | |
5b5dd21a | 569 | EXPORT_SYMBOL_GPL(appldata_diag); |
1da177e4 | 570 | |
0c3252d5 | 571 | #ifdef CONFIG_SWAP |
1da177e4 | 572 | EXPORT_SYMBOL_GPL(si_swapinfo); |
0c3252d5 | 573 | #endif |
1da177e4 | 574 | EXPORT_SYMBOL_GPL(nr_threads); |
1da177e4 LT |
575 | EXPORT_SYMBOL_GPL(nr_running); |
576 | EXPORT_SYMBOL_GPL(nr_iowait); |