2 * arch/s390/appldata/appldata_base.c
4 * Base infrastructure for Linux-z/VM Monitor Stream, Stage 1.
5 * Exports appldata_register_ops() and appldata_unregister_ops() for the
6 * data gathering modules.
8 * Copyright (C) 2003 IBM Corporation, IBM Deutschland Entwicklung GmbH.
10 * Author: Gerald Schaefer <geraldsc@de.ibm.com>
13 #include <linux/config.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
17 #include <linux/errno.h>
18 #include <asm/uaccess.h>
21 #include <linux/interrupt.h>
22 #include <linux/proc_fs.h>
23 #include <linux/page-flags.h>
24 #include <linux/swap.h>
25 #include <linux/pagemap.h>
26 #include <linux/sysctl.h>
27 #include <asm/timer.h>
28 //#include <linux/kernel_stat.h>
29 #include <linux/notifier.h>
30 #include <linux/cpu.h>
31 #include <linux/workqueue.h>
36 #define MY_PRINT_NAME "appldata" /* for debug messages, etc. */
37 #define APPLDATA_CPU_INTERVAL 10000 /* default (CPU) time for
41 #define TOD_MICRO 0x01000 /* nr. of TOD clock units
45 #define APPLDATA_START_INTERVAL_REC 0x00 /* Function codes for */
46 #define APPLDATA_STOP_REC 0x01 /* DIAG 0xDC */
47 #define APPLDATA_GEN_EVENT_RECORD 0x02
48 #define APPLDATA_START_CONFIG_REC 0x03
52 #define APPLDATA_START_INTERVAL_REC 0x80
53 #define APPLDATA_STOP_REC 0x81
54 #define APPLDATA_GEN_EVENT_RECORD 0x82
55 #define APPLDATA_START_CONFIG_REC 0x83
57 #endif /* CONFIG_64BIT */
61 * Parameter list for DIAGNOSE X'DC'
64 struct appldata_parameter_list {
65 u16 diag; /* The DIAGNOSE code X'00DC' */
66 u8 function; /* The function code for the DIAGNOSE */
67 u8 parlist_length; /* Length of the parameter list */
68 u32 product_id_addr; /* Address of the 16-byte product ID */
70 u16 buffer_length; /* Length of the application data buffer */
71 u32 buffer_addr; /* Address of the application data buffer */
74 struct appldata_parameter_list {
85 #endif /* CONFIG_64BIT */
88 * /proc entries (sysctl)
90 static const char appldata_proc_name[APPLDATA_PROC_NAME_LENGTH] = "appldata";
91 static int appldata_timer_handler(ctl_table *ctl, int write, struct file *filp,
92 void __user *buffer, size_t *lenp, loff_t *ppos);
93 static int appldata_interval_handler(ctl_table *ctl, int write,
96 size_t *lenp, loff_t *ppos);
98 static struct ctl_table_header *appldata_sysctl_header;
99 static struct ctl_table appldata_table[] = {
101 .ctl_name = CTL_APPLDATA_TIMER,
103 .mode = S_IRUGO | S_IWUSR,
104 .proc_handler = &appldata_timer_handler,
107 .ctl_name = CTL_APPLDATA_INTERVAL,
108 .procname = "interval",
109 .mode = S_IRUGO | S_IWUSR,
110 .proc_handler = &appldata_interval_handler,
115 static struct ctl_table appldata_dir_table[] = {
117 .ctl_name = CTL_APPLDATA,
118 .procname = appldata_proc_name,
120 .mode = S_IRUGO | S_IXUGO,
121 .child = appldata_table,
129 DEFINE_PER_CPU(struct vtimer_list, appldata_timer);
130 static atomic_t appldata_expire_count = ATOMIC_INIT(0);
132 static DEFINE_SPINLOCK(appldata_timer_lock);
133 static int appldata_interval = APPLDATA_CPU_INTERVAL;
134 static int appldata_timer_active;
139 static struct workqueue_struct *appldata_wq;
140 static void appldata_work_fn(void *data);
141 static DECLARE_WORK(appldata_work, appldata_work_fn, NULL);
147 static DEFINE_SPINLOCK(appldata_ops_lock);
148 static LIST_HEAD(appldata_ops_list);
151 /*************************** timer, work, DIAG *******************************/
153 * appldata_timer_function()
155 * schedule work and reschedule timer
157 static void appldata_timer_function(unsigned long data, struct pt_regs *regs)
159 P_DEBUG(" -= Timer =-\n");
160 P_DEBUG("CPU: %i, expire_count: %i\n", smp_processor_id(),
161 atomic_read(&appldata_expire_count));
162 if (atomic_dec_and_test(&appldata_expire_count)) {
163 atomic_set(&appldata_expire_count, num_online_cpus());
164 queue_work(appldata_wq, (struct work_struct *) data);
171 * call data gathering function for each (active) module
173 static void appldata_work_fn(void *data)
175 struct list_head *lh;
176 struct appldata_ops *ops;
179 P_DEBUG(" -= Work Queue =-\n");
181 spin_lock(&appldata_ops_lock);
182 list_for_each(lh, &appldata_ops_list) {
183 ops = list_entry(lh, struct appldata_ops, list);
184 P_DEBUG("list_for_each loop: %i) active = %u, name = %s\n",
185 ++i, ops->active, ops->name);
186 if (ops->active == 1) {
187 ops->callback(ops->data);
190 spin_unlock(&appldata_ops_lock);
196 * prepare parameter list, issue DIAG 0xDC
198 static int appldata_diag(char record_nr, u16 function, unsigned long buffer,
202 struct appldata_product_id {
203 char prod_nr[7]; /* product nr. */
204 char prod_fn[2]; /* product function */
205 char record_nr; /* record nr. */
206 char version_nr[2]; /* version */
207 char release_nr[2]; /* release */
208 char mod_lvl[2]; /* modification lvl. */
209 } appldata_product_id = {
210 /* all strings are EBCDIC, record_nr is byte */
211 .prod_nr = {0xD3, 0xC9, 0xD5, 0xE4,
212 0xE7, 0xD2, 0xD9}, /* "LINUXKR" */
213 .prod_fn = {0xD5, 0xD3}, /* "NL" */
214 .record_nr = record_nr,
215 .version_nr = {0xF2, 0xF6}, /* "26" */
216 .release_nr = {0xF0, 0xF1}, /* "01" */
217 .mod_lvl = {0xF0, 0xF0}, /* "00" */
219 struct appldata_parameter_list appldata_parameter_list = {
221 .function = function,
223 sizeof(appldata_parameter_list),
224 .buffer_length = length,
226 (unsigned long) &appldata_product_id,
227 .buffer_addr = virt_to_phys((void *) buffer)
234 "diag %1,%0,0xDC\n\t"
236 : "d" (&appldata_parameter_list),
237 "m" (appldata_parameter_list),
238 "m" (appldata_product_id)
242 /************************ timer, work, DIAG <END> ****************************/
245 /****************************** /proc stuff **********************************/
248 * appldata_mod_vtimer_wrap()
250 * wrapper function for mod_virt_timer(), because smp_call_function_on()
251 * accepts only one parameter.
253 static void __appldata_mod_vtimer_wrap(void *p) {
255 struct vtimer_list *timer;
258 mod_virt_timer(args->timer, args->expires);
261 #define APPLDATA_ADD_TIMER 0
262 #define APPLDATA_DEL_TIMER 1
263 #define APPLDATA_MOD_TIMER 2
266 * __appldata_vtimer_setup()
268 * Add, delete or modify virtual timers on all online cpus.
269 * The caller needs to get the appldata_timer_lock spinlock.
272 __appldata_vtimer_setup(int cmd)
274 u64 per_cpu_interval;
278 case APPLDATA_ADD_TIMER:
279 if (appldata_timer_active)
281 per_cpu_interval = (u64) (appldata_interval*1000 /
282 num_online_cpus()) * TOD_MICRO;
283 for_each_online_cpu(i) {
284 per_cpu(appldata_timer, i).expires = per_cpu_interval;
285 smp_call_function_on(add_virt_timer_periodic,
286 &per_cpu(appldata_timer, i),
289 appldata_timer_active = 1;
290 P_INFO("Monitoring timer started.\n");
292 case APPLDATA_DEL_TIMER:
293 for_each_online_cpu(i)
294 del_virt_timer(&per_cpu(appldata_timer, i));
295 if (!appldata_timer_active)
297 appldata_timer_active = 0;
298 atomic_set(&appldata_expire_count, num_online_cpus());
299 P_INFO("Monitoring timer stopped.\n");
301 case APPLDATA_MOD_TIMER:
302 per_cpu_interval = (u64) (appldata_interval*1000 /
303 num_online_cpus()) * TOD_MICRO;
304 if (!appldata_timer_active)
306 for_each_online_cpu(i) {
308 struct vtimer_list *timer;
311 args.timer = &per_cpu(appldata_timer, i);
312 args.expires = per_cpu_interval;
313 smp_call_function_on(__appldata_mod_vtimer_wrap,
320 * appldata_timer_handler()
322 * Start/Stop timer, show status of timer (0 = not active, 1 = active)
325 appldata_timer_handler(ctl_table *ctl, int write, struct file *filp,
326 void __user *buffer, size_t *lenp, loff_t *ppos)
331 if (!*lenp || *ppos) {
336 len = sprintf(buf, appldata_timer_active ? "1\n" : "0\n");
339 if (copy_to_user(buffer, buf, len))
344 if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
346 spin_lock(&appldata_timer_lock);
348 __appldata_vtimer_setup(APPLDATA_ADD_TIMER);
349 else if (buf[0] == '0')
350 __appldata_vtimer_setup(APPLDATA_DEL_TIMER);
351 spin_unlock(&appldata_timer_lock);
359 * appldata_interval_handler()
361 * Set (CPU) timer interval for collection of data (in milliseconds), show
362 * current timer interval.
365 appldata_interval_handler(ctl_table *ctl, int write, struct file *filp,
366 void __user *buffer, size_t *lenp, loff_t *ppos)
371 if (!*lenp || *ppos) {
376 len = sprintf(buf, "%i\n", appldata_interval);
379 if (copy_to_user(buffer, buf, len))
384 if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len)) {
387 sscanf(buf, "%i", &interval);
389 P_ERROR("Timer CPU interval has to be > 0!\n");
393 spin_lock(&appldata_timer_lock);
394 appldata_interval = interval;
395 __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
396 spin_unlock(&appldata_timer_lock);
398 P_INFO("Monitoring CPU interval set to %u milliseconds.\n",
407 * appldata_generic_handler()
409 * Generic start/stop monitoring and DIAG, show status of
410 * monitoring (0 = not in process, 1 = in process)
413 appldata_generic_handler(ctl_table *ctl, int write, struct file *filp,
414 void __user *buffer, size_t *lenp, loff_t *ppos)
416 struct appldata_ops *ops = NULL, *tmp_ops;
419 struct list_head *lh;
422 spin_lock(&appldata_ops_lock);
423 list_for_each(lh, &appldata_ops_list) {
424 tmp_ops = list_entry(lh, struct appldata_ops, list);
425 if (&tmp_ops->ctl_table[2] == ctl) {
430 spin_unlock(&appldata_ops_lock);
434 if (!try_module_get(ops->owner)) { // protect this function
435 spin_unlock(&appldata_ops_lock);
438 spin_unlock(&appldata_ops_lock);
440 if (!*lenp || *ppos) {
442 module_put(ops->owner);
446 len = sprintf(buf, ops->active ? "1\n" : "0\n");
449 if (copy_to_user(buffer, buf, len)) {
450 module_put(ops->owner);
456 if (copy_from_user(buf, buffer,
457 len > sizeof(buf) ? sizeof(buf) : len)) {
458 module_put(ops->owner);
462 spin_lock(&appldata_ops_lock);
463 if ((buf[0] == '1') && (ops->active == 0)) {
464 // protect work queue callback
465 if (!try_module_get(ops->owner)) {
466 spin_unlock(&appldata_ops_lock);
467 module_put(ops->owner);
471 ops->callback(ops->data); // init record
472 rc = appldata_diag(ops->record_nr,
473 APPLDATA_START_INTERVAL_REC,
474 (unsigned long) ops->data, ops->size);
476 P_ERROR("START DIAG 0xDC for %s failed, "
477 "return code: %d\n", ops->name, rc);
478 module_put(ops->owner);
481 P_INFO("Monitoring %s data enabled, "
482 "DIAG 0xDC started.\n", ops->name);
484 } else if ((buf[0] == '0') && (ops->active == 1)) {
486 rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
487 (unsigned long) ops->data, ops->size);
489 P_ERROR("STOP DIAG 0xDC for %s failed, "
490 "return code: %d\n", ops->name, rc);
492 P_INFO("Monitoring %s data disabled, "
493 "DIAG 0xDC stopped.\n", ops->name);
495 module_put(ops->owner);
497 spin_unlock(&appldata_ops_lock);
501 module_put(ops->owner);
505 /*************************** /proc stuff <END> *******************************/
508 /************************* module-ops management *****************************/
510 * appldata_register_ops()
512 * update ops list, register /proc/sys entries
514 int appldata_register_ops(struct appldata_ops *ops)
516 struct list_head *lh;
517 struct appldata_ops *tmp_ops;
522 if ((ops->size > APPLDATA_MAX_REC_SIZE) ||
524 P_ERROR("Invalid size of %s record = %i, maximum = %i!\n",
525 ops->name, ops->size, APPLDATA_MAX_REC_SIZE);
528 if ((ops->ctl_nr == CTL_APPLDATA) ||
529 (ops->ctl_nr == CTL_APPLDATA_TIMER) ||
530 (ops->ctl_nr == CTL_APPLDATA_INTERVAL)) {
531 P_ERROR("ctl_nr %i already in use!\n", ops->ctl_nr);
534 ops->ctl_table = kmalloc(4*sizeof(struct ctl_table), GFP_KERNEL);
535 if (ops->ctl_table == NULL) {
536 P_ERROR("Not enough memory for %s ctl_table!\n", ops->name);
539 memset(ops->ctl_table, 0, 4*sizeof(struct ctl_table));
541 spin_lock(&appldata_ops_lock);
542 list_for_each(lh, &appldata_ops_list) {
543 tmp_ops = list_entry(lh, struct appldata_ops, list);
544 P_DEBUG("register_ops loop: %i) name = %s, ctl = %i\n",
545 ++i, tmp_ops->name, tmp_ops->ctl_nr);
546 P_DEBUG("Comparing %s (ctl %i) with %s (ctl %i)\n",
547 tmp_ops->name, tmp_ops->ctl_nr, ops->name,
549 if (strncmp(tmp_ops->name, ops->name,
550 APPLDATA_PROC_NAME_LENGTH) == 0) {
551 P_ERROR("Name \"%s\" already registered!\n", ops->name);
552 kfree(ops->ctl_table);
553 spin_unlock(&appldata_ops_lock);
556 if (tmp_ops->ctl_nr == ops->ctl_nr) {
557 P_ERROR("ctl_nr %i already registered!\n", ops->ctl_nr);
558 kfree(ops->ctl_table);
559 spin_unlock(&appldata_ops_lock);
563 list_add(&ops->list, &appldata_ops_list);
564 spin_unlock(&appldata_ops_lock);
566 ops->ctl_table[0].ctl_name = CTL_APPLDATA;
567 ops->ctl_table[0].procname = appldata_proc_name;
568 ops->ctl_table[0].maxlen = 0;
569 ops->ctl_table[0].mode = S_IRUGO | S_IXUGO;
570 ops->ctl_table[0].child = &ops->ctl_table[2];
572 ops->ctl_table[1].ctl_name = 0;
574 ops->ctl_table[2].ctl_name = ops->ctl_nr;
575 ops->ctl_table[2].procname = ops->name;
576 ops->ctl_table[2].mode = S_IRUGO | S_IWUSR;
577 ops->ctl_table[2].proc_handler = appldata_generic_handler;
578 ops->ctl_table[2].data = ops;
580 ops->ctl_table[3].ctl_name = 0;
582 ops->sysctl_header = register_sysctl_table(ops->ctl_table,1);
584 P_INFO("%s-ops registered!\n", ops->name);
589 * appldata_unregister_ops()
591 * update ops list, unregister /proc entries, stop DIAG if necessary
593 void appldata_unregister_ops(struct appldata_ops *ops)
596 spin_lock(&appldata_ops_lock);
597 list_del(&ops->list);
598 /* at that point any incoming access will fail */
599 table = ops->ctl_table;
600 ops->ctl_table = NULL;
601 spin_unlock(&appldata_ops_lock);
602 unregister_sysctl_table(ops->sysctl_header);
604 P_INFO("%s-ops unregistered!\n", ops->name);
606 /********************** module-ops management <END> **************************/
609 /******************************* init / exit *********************************/
612 appldata_online_cpu(int cpu)
614 init_virt_timer(&per_cpu(appldata_timer, cpu));
615 per_cpu(appldata_timer, cpu).function = appldata_timer_function;
616 per_cpu(appldata_timer, cpu).data = (unsigned long)
618 atomic_inc(&appldata_expire_count);
619 spin_lock(&appldata_timer_lock);
620 __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
621 spin_unlock(&appldata_timer_lock);
625 appldata_offline_cpu(int cpu)
627 del_virt_timer(&per_cpu(appldata_timer, cpu));
628 if (atomic_dec_and_test(&appldata_expire_count)) {
629 atomic_set(&appldata_expire_count, num_online_cpus());
630 queue_work(appldata_wq, &appldata_work);
632 spin_lock(&appldata_timer_lock);
633 __appldata_vtimer_setup(APPLDATA_MOD_TIMER);
634 spin_unlock(&appldata_timer_lock);
638 appldata_cpu_notify(struct notifier_block *self,
639 unsigned long action, void *hcpu)
643 appldata_online_cpu((long) hcpu);
645 #ifdef CONFIG_HOTPLUG_CPU
647 appldata_offline_cpu((long) hcpu);
656 static struct notifier_block __devinitdata appldata_nb = {
657 .notifier_call = appldata_cpu_notify,
663 * init timer, register /proc entries
665 static int __init appldata_init(void)
669 P_DEBUG("sizeof(parameter_list) = %lu\n",
670 sizeof(struct appldata_parameter_list));
672 appldata_wq = create_singlethread_workqueue("appldata");
674 P_ERROR("Could not create work queue\n");
678 for_each_online_cpu(i)
679 appldata_online_cpu(i);
681 /* Register cpu hotplug notifier */
682 register_cpu_notifier(&appldata_nb);
684 appldata_sysctl_header = register_sysctl_table(appldata_dir_table, 1);
686 appldata_dir_table[0].de->owner = THIS_MODULE;
687 appldata_table[0].de->owner = THIS_MODULE;
688 appldata_table[1].de->owner = THIS_MODULE;
691 P_DEBUG("Base interface initialized.\n");
698 * stop timer, unregister /proc entries
700 static void __exit appldata_exit(void)
702 struct list_head *lh;
703 struct appldata_ops *ops;
706 P_DEBUG("Unloading module ...\n");
708 * ops list should be empty, but just in case something went wrong...
710 spin_lock(&appldata_ops_lock);
711 list_for_each(lh, &appldata_ops_list) {
712 ops = list_entry(lh, struct appldata_ops, list);
713 rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
714 (unsigned long) ops->data, ops->size);
716 P_ERROR("STOP DIAG 0xDC for %s failed, "
717 "return code: %d\n", ops->name, rc);
720 spin_unlock(&appldata_ops_lock);
722 for_each_online_cpu(i)
723 appldata_offline_cpu(i);
725 appldata_timer_active = 0;
727 unregister_sysctl_table(appldata_sysctl_header);
729 destroy_workqueue(appldata_wq);
730 P_DEBUG("... module unloaded!\n");
732 /**************************** init / exit <END> ******************************/
735 module_init(appldata_init);
736 module_exit(appldata_exit);
737 MODULE_LICENSE("GPL");
738 MODULE_AUTHOR("Gerald Schaefer");
739 MODULE_DESCRIPTION("Linux-VM Monitor Stream, base infrastructure");
741 EXPORT_SYMBOL_GPL(appldata_register_ops);
742 EXPORT_SYMBOL_GPL(appldata_unregister_ops);
746 * Kernel symbols needed by appldata_mem and appldata_os modules.
747 * However, if this file is compiled as a module (for testing only), these
748 * symbols are not exported. In this case, we define them locally and export
751 void si_swapinfo(struct sysinfo *val)
753 val->freeswap = -1ul;
754 val->totalswap = -1ul;
757 unsigned long avenrun[3] = {-1 - FIXED_1/200, -1 - FIXED_1/200,
761 void get_full_page_state(struct page_state *ps)
763 memset(ps, -1, sizeof(struct page_state));
766 unsigned long nr_running(void)
771 unsigned long nr_iowait(void)
776 /*unsigned long nr_context_switches(void)
781 EXPORT_SYMBOL_GPL(si_swapinfo);
782 EXPORT_SYMBOL_GPL(nr_threads);
783 EXPORT_SYMBOL_GPL(avenrun);
784 EXPORT_SYMBOL_GPL(get_full_page_state);
785 EXPORT_SYMBOL_GPL(nr_running);
786 EXPORT_SYMBOL_GPL(nr_iowait);
787 //EXPORT_SYMBOL_GPL(nr_context_switches);