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
= kzalloc(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
);
540 spin_lock(&appldata_ops_lock
);
541 list_for_each(lh
, &appldata_ops_list
) {
542 tmp_ops
= list_entry(lh
, struct appldata_ops
, list
);
543 P_DEBUG("register_ops loop: %i) name = %s, ctl = %i\n",
544 ++i
, tmp_ops
->name
, tmp_ops
->ctl_nr
);
545 P_DEBUG("Comparing %s (ctl %i) with %s (ctl %i)\n",
546 tmp_ops
->name
, tmp_ops
->ctl_nr
, ops
->name
,
548 if (strncmp(tmp_ops
->name
, ops
->name
,
549 APPLDATA_PROC_NAME_LENGTH
) == 0) {
550 P_ERROR("Name \"%s\" already registered!\n", ops
->name
);
551 kfree(ops
->ctl_table
);
552 spin_unlock(&appldata_ops_lock
);
555 if (tmp_ops
->ctl_nr
== ops
->ctl_nr
) {
556 P_ERROR("ctl_nr %i already registered!\n", ops
->ctl_nr
);
557 kfree(ops
->ctl_table
);
558 spin_unlock(&appldata_ops_lock
);
562 list_add(&ops
->list
, &appldata_ops_list
);
563 spin_unlock(&appldata_ops_lock
);
565 ops
->ctl_table
[0].ctl_name
= CTL_APPLDATA
;
566 ops
->ctl_table
[0].procname
= appldata_proc_name
;
567 ops
->ctl_table
[0].maxlen
= 0;
568 ops
->ctl_table
[0].mode
= S_IRUGO
| S_IXUGO
;
569 ops
->ctl_table
[0].child
= &ops
->ctl_table
[2];
571 ops
->ctl_table
[1].ctl_name
= 0;
573 ops
->ctl_table
[2].ctl_name
= ops
->ctl_nr
;
574 ops
->ctl_table
[2].procname
= ops
->name
;
575 ops
->ctl_table
[2].mode
= S_IRUGO
| S_IWUSR
;
576 ops
->ctl_table
[2].proc_handler
= appldata_generic_handler
;
577 ops
->ctl_table
[2].data
= ops
;
579 ops
->ctl_table
[3].ctl_name
= 0;
581 ops
->sysctl_header
= register_sysctl_table(ops
->ctl_table
,1);
583 P_INFO("%s-ops registered!\n", ops
->name
);
588 * appldata_unregister_ops()
590 * update ops list, unregister /proc entries, stop DIAG if necessary
592 void appldata_unregister_ops(struct appldata_ops
*ops
)
595 spin_lock(&appldata_ops_lock
);
596 list_del(&ops
->list
);
597 /* at that point any incoming access will fail */
598 table
= ops
->ctl_table
;
599 ops
->ctl_table
= NULL
;
600 spin_unlock(&appldata_ops_lock
);
601 unregister_sysctl_table(ops
->sysctl_header
);
603 P_INFO("%s-ops unregistered!\n", ops
->name
);
605 /********************** module-ops management <END> **************************/
608 /******************************* init / exit *********************************/
611 appldata_online_cpu(int cpu
)
613 init_virt_timer(&per_cpu(appldata_timer
, cpu
));
614 per_cpu(appldata_timer
, cpu
).function
= appldata_timer_function
;
615 per_cpu(appldata_timer
, cpu
).data
= (unsigned long)
617 atomic_inc(&appldata_expire_count
);
618 spin_lock(&appldata_timer_lock
);
619 __appldata_vtimer_setup(APPLDATA_MOD_TIMER
);
620 spin_unlock(&appldata_timer_lock
);
624 appldata_offline_cpu(int cpu
)
626 del_virt_timer(&per_cpu(appldata_timer
, cpu
));
627 if (atomic_dec_and_test(&appldata_expire_count
)) {
628 atomic_set(&appldata_expire_count
, num_online_cpus());
629 queue_work(appldata_wq
, &appldata_work
);
631 spin_lock(&appldata_timer_lock
);
632 __appldata_vtimer_setup(APPLDATA_MOD_TIMER
);
633 spin_unlock(&appldata_timer_lock
);
637 appldata_cpu_notify(struct notifier_block
*self
,
638 unsigned long action
, void *hcpu
)
642 appldata_online_cpu((long) hcpu
);
644 #ifdef CONFIG_HOTPLUG_CPU
646 appldata_offline_cpu((long) hcpu
);
655 static struct notifier_block __devinitdata appldata_nb
= {
656 .notifier_call
= appldata_cpu_notify
,
662 * init timer, register /proc entries
664 static int __init
appldata_init(void)
668 P_DEBUG("sizeof(parameter_list) = %lu\n",
669 sizeof(struct appldata_parameter_list
));
671 appldata_wq
= create_singlethread_workqueue("appldata");
673 P_ERROR("Could not create work queue\n");
677 for_each_online_cpu(i
)
678 appldata_online_cpu(i
);
680 /* Register cpu hotplug notifier */
681 register_cpu_notifier(&appldata_nb
);
683 appldata_sysctl_header
= register_sysctl_table(appldata_dir_table
, 1);
685 appldata_dir_table
[0].de
->owner
= THIS_MODULE
;
686 appldata_table
[0].de
->owner
= THIS_MODULE
;
687 appldata_table
[1].de
->owner
= THIS_MODULE
;
690 P_DEBUG("Base interface initialized.\n");
697 * stop timer, unregister /proc entries
699 static void __exit
appldata_exit(void)
701 struct list_head
*lh
;
702 struct appldata_ops
*ops
;
705 P_DEBUG("Unloading module ...\n");
707 * ops list should be empty, but just in case something went wrong...
709 spin_lock(&appldata_ops_lock
);
710 list_for_each(lh
, &appldata_ops_list
) {
711 ops
= list_entry(lh
, struct appldata_ops
, list
);
712 rc
= appldata_diag(ops
->record_nr
, APPLDATA_STOP_REC
,
713 (unsigned long) ops
->data
, ops
->size
);
715 P_ERROR("STOP DIAG 0xDC for %s failed, "
716 "return code: %d\n", ops
->name
, rc
);
719 spin_unlock(&appldata_ops_lock
);
721 for_each_online_cpu(i
)
722 appldata_offline_cpu(i
);
724 appldata_timer_active
= 0;
726 unregister_sysctl_table(appldata_sysctl_header
);
728 destroy_workqueue(appldata_wq
);
729 P_DEBUG("... module unloaded!\n");
731 /**************************** init / exit <END> ******************************/
734 module_init(appldata_init
);
735 module_exit(appldata_exit
);
736 MODULE_LICENSE("GPL");
737 MODULE_AUTHOR("Gerald Schaefer");
738 MODULE_DESCRIPTION("Linux-VM Monitor Stream, base infrastructure");
740 EXPORT_SYMBOL_GPL(appldata_register_ops
);
741 EXPORT_SYMBOL_GPL(appldata_unregister_ops
);
745 * Kernel symbols needed by appldata_mem and appldata_os modules.
746 * However, if this file is compiled as a module (for testing only), these
747 * symbols are not exported. In this case, we define them locally and export
750 void si_swapinfo(struct sysinfo
*val
)
752 val
->freeswap
= -1ul;
753 val
->totalswap
= -1ul;
756 unsigned long avenrun
[3] = {-1 - FIXED_1
/200, -1 - FIXED_1
/200,
760 void get_full_page_state(struct page_state
*ps
)
762 memset(ps
, -1, sizeof(struct page_state
));
765 unsigned long nr_running(void)
770 unsigned long nr_iowait(void)
775 /*unsigned long nr_context_switches(void)
780 EXPORT_SYMBOL_GPL(si_swapinfo
);
781 EXPORT_SYMBOL_GPL(nr_threads
);
782 EXPORT_SYMBOL_GPL(avenrun
);
783 EXPORT_SYMBOL_GPL(get_full_page_state
);
784 EXPORT_SYMBOL_GPL(nr_running
);
785 EXPORT_SYMBOL_GPL(nr_iowait
);
786 //EXPORT_SYMBOL_GPL(nr_context_switches);