[net-next-2.6.git] / arch / s390 / kernel / sysinfo.c

/*
 *  Copyright IBM Corp. 2001, 2009
 *  Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
 *	       Martin Schwidefsky <schwidefsky@de.ibm.com>,
 */

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/ebcdic.h>
#include <asm/sysinfo.h>
#include <asm/cpcmd.h>

/* Sigh, math-emu. Don't ask. */
#include <asm/sfp-util.h>
#include <math-emu/soft-fp.h>
#include <math-emu/single.h>

static inline int stsi_0(void)
{
	int rc = stsi(NULL, 0, 0, 0);
	return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
}

static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
{
	if (stsi(info, 1, 1, 1) == -ENOSYS)
		return len;

	EBCASC(info->manufacturer, sizeof(info->manufacturer));
	EBCASC(info->type, sizeof(info->type));
	EBCASC(info->model, sizeof(info->model));
	EBCASC(info->sequence, sizeof(info->sequence));
	EBCASC(info->plant, sizeof(info->plant));
	EBCASC(info->model_capacity, sizeof(info->model_capacity));
	EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
	EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
	len += sprintf(page + len, "Manufacturer:         %-16.16s\n",
		       info->manufacturer);
	len += sprintf(page + len, "Type:                 %-4.4s\n",
		       info->type);
	if (info->model[0] != '\0')
		/*
		 * Sigh: the model field has been renamed with System z9
		 * to model_capacity and a new model field has been added
		 * after the plant field. To avoid confusing older programs
		 * the "Model:" prints "model_capacity model" or just
		 * "model_capacity" if the model string is empty .
		 */
		len += sprintf(page + len,
			       "Model:                %-16.16s %-16.16s\n",
			       info->model_capacity, info->model);
	else
		len += sprintf(page + len, "Model:                %-16.16s\n",
			       info->model_capacity);
	len += sprintf(page + len, "Sequence Code:        %-16.16s\n",
		       info->sequence);
	len += sprintf(page + len, "Plant:                %-4.4s\n",
		       info->plant);
	len += sprintf(page + len, "Model Capacity:       %-16.16s %08u\n",
		       info->model_capacity, *(u32 *) info->model_cap_rating);
	if (info->model_perm_cap[0] != '\0')
		len += sprintf(page + len,
			       "Model Perm. Capacity: %-16.16s %08u\n",
			       info->model_perm_cap,
			       *(u32 *) info->model_perm_cap_rating);
	if (info->model_temp_cap[0] != '\0')
		len += sprintf(page + len,
			       "Model Temp. Capacity: %-16.16s %08u\n",
			       info->model_temp_cap,
			       *(u32 *) info->model_temp_cap_rating);
	if (info->cai) {
		len += sprintf(page + len,
			       "Capacity Adj. Ind.:   %d\n",
			       info->cai);
		len += sprintf(page + len, "Capacity Ch. Reason:  %d\n",
			       info->ccr);
	}
	return len;
}

static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
{
	struct sysinfo_1_2_2_extension *ext;
	int i;

	if (stsi(info, 1, 2, 2) == -ENOSYS)
		return len;
	ext = (struct sysinfo_1_2_2_extension *)
		((unsigned long) info + info->acc_offset);

	len += sprintf(page + len, "\n");
	len += sprintf(page + len, "CPUs Total:           %d\n",
		       info->cpus_total);
	len += sprintf(page + len, "CPUs Configured:      %d\n",
		       info->cpus_configured);
	len += sprintf(page + len, "CPUs Standby:         %d\n",
		       info->cpus_standby);
	len += sprintf(page + len, "CPUs Reserved:        %d\n",
		       info->cpus_reserved);

	if (info->format == 1) {
		/*
		 * Sigh 2. According to the specification the alternate
		 * capability field is a 32 bit floating point number
		 * if the higher order 8 bits are not zero. Printing
		 * a floating point number in the kernel is a no-no,
		 * always print the number as 32 bit unsigned integer.
		 * The user-space needs to know about the strange
		 * encoding of the alternate cpu capability.
		 */
		len += sprintf(page + len, "Capability:           %u %u\n",
			       info->capability, ext->alt_capability);
		for (i = 2; i <= info->cpus_total; i++)
			len += sprintf(page + len,
				       "Adjustment %02d-way:    %u %u\n",
				       i, info->adjustment[i-2],
				       ext->alt_adjustment[i-2]);

	} else {
		len += sprintf(page + len, "Capability:           %u\n",
			       info->capability);
		for (i = 2; i <= info->cpus_total; i++)
			len += sprintf(page + len,
				       "Adjustment %02d-way:    %u\n",
				       i, info->adjustment[i-2]);
	}

	if (info->secondary_capability != 0)
		len += sprintf(page + len, "Secondary Capability: %d\n",
			       info->secondary_capability);
	return len;
}

static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
{
	if (stsi(info, 2, 2, 2) == -ENOSYS)
		return len;

	EBCASC(info->name, sizeof(info->name));

	len += sprintf(page + len, "\n");
	len += sprintf(page + len, "LPAR Number:          %d\n",
		       info->lpar_number);

	len += sprintf(page + len, "LPAR Characteristics: ");
	if (info->characteristics & LPAR_CHAR_DEDICATED)
		len += sprintf(page + len, "Dedicated ");
	if (info->characteristics & LPAR_CHAR_SHARED)
		len += sprintf(page + len, "Shared ");
	if (info->characteristics & LPAR_CHAR_LIMITED)
		len += sprintf(page + len, "Limited ");
	len += sprintf(page + len, "\n");

	len += sprintf(page + len, "LPAR Name:            %-8.8s\n",
		       info->name);

	len += sprintf(page + len, "LPAR Adjustment:      %d\n",
		       info->caf);

	len += sprintf(page + len, "LPAR CPUs Total:      %d\n",
		       info->cpus_total);
	len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
		       info->cpus_configured);
	len += sprintf(page + len, "LPAR CPUs Standby:    %d\n",
		       info->cpus_standby);
	len += sprintf(page + len, "LPAR CPUs Reserved:   %d\n",
		       info->cpus_reserved);
	len += sprintf(page + len, "LPAR CPUs Dedicated:  %d\n",
		       info->cpus_dedicated);
	len += sprintf(page + len, "LPAR CPUs Shared:     %d\n",
		       info->cpus_shared);
	return len;
}

static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
{
	int i;

	if (stsi(info, 3, 2, 2) == -ENOSYS)
		return len;
	for (i = 0; i < info->count; i++) {
		EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
		EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
		len += sprintf(page + len, "\n");
		len += sprintf(page + len, "VM%02d Name:            %-8.8s\n",
			       i, info->vm[i].name);
		len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
			       i, info->vm[i].cpi);

		len += sprintf(page + len, "VM%02d Adjustment:      %d\n",
			       i, info->vm[i].caf);

		len += sprintf(page + len, "VM%02d CPUs Total:      %d\n",
			       i, info->vm[i].cpus_total);
		len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
			       i, info->vm[i].cpus_configured);
		len += sprintf(page + len, "VM%02d CPUs Standby:    %d\n",
			       i, info->vm[i].cpus_standby);
		len += sprintf(page + len, "VM%02d CPUs Reserved:   %d\n",
			       i, info->vm[i].cpus_reserved);
	}
	return len;
}

static int proc_read_sysinfo(char *page, char **start,
			     off_t off, int count,
			     int *eof, void *data)
{
	unsigned long info = get_zeroed_page(GFP_KERNEL);
	int level, len;

	if (!info)
		return 0;

	len = 0;
	level = stsi_0();
	if (level >= 1)
		len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);

	if (level >= 1)
		len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);

	if (level >= 2)
		len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);

	if (level >= 3)
		len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);

	free_page(info);
	return len;
}

static __init int create_proc_sysinfo(void)
{
	create_proc_read_entry("sysinfo", 0444, NULL,
			       proc_read_sysinfo, NULL);
	return 0;
}
device_initcall(create_proc_sysinfo);

/*
 * Service levels interface.
 */

static DECLARE_RWSEM(service_level_sem);
static LIST_HEAD(service_level_list);

int register_service_level(struct service_level *slr)
{
	struct service_level *ptr;

	down_write(&service_level_sem);
	list_for_each_entry(ptr, &service_level_list, list)
		if (ptr == slr) {
			up_write(&service_level_sem);
			return -EEXIST;
		}
	list_add_tail(&slr->list, &service_level_list);
	up_write(&service_level_sem);
	return 0;
}
EXPORT_SYMBOL(register_service_level);

int unregister_service_level(struct service_level *slr)
{
	struct service_level *ptr, *next;
	int rc = -ENOENT;

	down_write(&service_level_sem);
	list_for_each_entry_safe(ptr, next, &service_level_list, list) {
		if (ptr != slr)
			continue;
		list_del(&ptr->list);
		rc = 0;
		break;
	}
	up_write(&service_level_sem);
	return rc;
}
EXPORT_SYMBOL(unregister_service_level);

static void *service_level_start(struct seq_file *m, loff_t *pos)
{
	down_read(&service_level_sem);
	return seq_list_start(&service_level_list, *pos);
}

static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
{
	return seq_list_next(p, &service_level_list, pos);
}

static void service_level_stop(struct seq_file *m, void *p)
{
	up_read(&service_level_sem);
}

static int service_level_show(struct seq_file *m, void *p)
{
	struct service_level *slr;

	slr = list_entry(p, struct service_level, list);
	slr->seq_print(m, slr);
	return 0;
}

static const struct seq_operations service_level_seq_ops = {
	.start		= service_level_start,
	.next		= service_level_next,
	.stop		= service_level_stop,
	.show		= service_level_show
};

static int service_level_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &service_level_seq_ops);
}

static const struct file_operations service_level_ops = {
	.open		= service_level_open,
	.read		= seq_read,
	.llseek 	= seq_lseek,
	.release	= seq_release
};

static void service_level_vm_print(struct seq_file *m,
				   struct service_level *slr)
{
	char *query_buffer, *str;

	query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
	if (!query_buffer)
		return;
	cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
	str = strchr(query_buffer, '\n');
	if (str)
		*str = 0;
	seq_printf(m, "VM: %s\n", query_buffer);
	kfree(query_buffer);
}

static struct service_level service_level_vm = {
	.seq_print = service_level_vm_print
};

static __init int create_proc_service_level(void)
{
	proc_create("service_levels", 0, NULL, &service_level_ops);
	if (MACHINE_IS_VM)
		register_service_level(&service_level_vm);
	return 0;
}
subsys_initcall(create_proc_service_level);

/*
 * Bogomips calculation based on cpu capability.
 */
int get_cpu_capability(unsigned int *capability)
{
	struct sysinfo_1_2_2 *info;
	int rc;

	info = (void *) get_zeroed_page(GFP_KERNEL);
	if (!info)
		return -ENOMEM;
	rc = stsi(info, 1, 2, 2);
	if (rc == -ENOSYS)
		goto out;
	rc = 0;
	*capability = info->capability;
out:
	free_page((unsigned long) info);
	return rc;
}

/*
 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
 */
void s390_adjust_jiffies(void)
{
	struct sysinfo_1_2_2 *info;
	const unsigned int fmil = 0x4b189680;	/* 1e7 as 32-bit float. */
	FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
	FP_DECL_EX;
	unsigned int capability;

	info = (void *) get_zeroed_page(GFP_KERNEL);
	if (!info)
		return;

	if (stsi(info, 1, 2, 2) != -ENOSYS) {
		/*
		 * Major sigh. The cpu capability encoding is "special".
		 * If the first 9 bits of info->capability are 0 then it
		 * is a 32 bit unsigned integer in the range 0 .. 2^23.
		 * If the first 9 bits are != 0 then it is a 32 bit float.
		 * In addition a lower value indicates a proportionally
		 * higher cpu capacity. Bogomips are the other way round.
		 * To get to a halfway suitable number we divide 1e7
		 * by the cpu capability number. Yes, that means a floating
		 * point division .. math-emu here we come :-)
		 */
		FP_UNPACK_SP(SA, &fmil);
		if ((info->capability >> 23) == 0)
			FP_FROM_INT_S(SB, info->capability, 32, int);
		else
			FP_UNPACK_SP(SB, &info->capability);
		FP_DIV_S(SR, SA, SB);
		FP_TO_INT_S(capability, SR, 32, 0);
	} else
		/*
		 * Really old machine without stsi block for basic
		 * cpu information. Report 42.0 bogomips.
		 */
		capability = 42;
	loops_per_jiffy = capability * (500000/HZ);
	free_page((unsigned long) info);
}

/*
 * calibrate the delay loop
 */
void __cpuinit calibrate_delay(void)
{
	s390_adjust_jiffies();
	/* Print the good old Bogomips line .. */
	printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
	       "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
	       (loops_per_jiffy/(5000/HZ)) % 100);
}
Commit	Line	Data
1da177e4	1	/*
94f5b09d HC	2	* Copyright IBM Corp. 2001, 2009
	3	* Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
	4	* Martin Schwidefsky <schwidefsky@de.ibm.com>,
1da177e4 LT	5	*/
1da177e4 LT	6
1da177e4 LT	7	#include <linux/kernel.h>
	8	#include <linux/mm.h>
	9	#include <linux/proc_fs.h>
6bcac508	10	#include <linux/seq_file.h>
1da177e4	11	#include <linux/init.h>
31ee4b2f	12	#include <linux/delay.h>
6bcac508	13	#include <linux/module.h>
5a0e3ad6	14	#include <linux/slab.h>
1da177e4	15	#include <asm/ebcdic.h>
aa24f7f0	16	#include <asm/sysinfo.h>
6bcac508	17	#include <asm/cpcmd.h>
1da177e4	18
31ee4b2f MS	19	/* Sigh, math-emu. Don't ask. */
	20	#include <asm/sfp-util.h>
	21	#include <math-emu/soft-fp.h>
	22	#include <math-emu/single.h>
	23
0fee644a	24	static inline int stsi_0(void)
1da177e4	25	{
94f5b09d	26	int rc = stsi(NULL, 0, 0, 0);
0fee644a	27	return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
1da177e4 LT	28	}
1da177e4 LT	29
0fee644a	30	static int stsi_1_1_1(struct sysinfo_1_1_1 info, char page, int len)
1da177e4	31	{
0fee644a MS	32	if (stsi(info, 1, 1, 1) == -ENOSYS)
	33	return len;
	34
	35	EBCASC(info->manufacturer, sizeof(info->manufacturer));
	36	EBCASC(info->type, sizeof(info->type));
	37	EBCASC(info->model, sizeof(info->model));
	38	EBCASC(info->sequence, sizeof(info->sequence));
	39	EBCASC(info->plant, sizeof(info->plant));
	40	EBCASC(info->model_capacity, sizeof(info->model_capacity));
cbce70e6 MS	41	EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
cbce70e6 MS	42	EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
0fee644a MS	43	len += sprintf(page + len, "Manufacturer: %-16.16s\n",
	44	info->manufacturer);
	45	len += sprintf(page + len, "Type: %-4.4s\n",
	46	info->type);
	47	if (info->model[0] != '\0')
	48	/*
	49	* Sigh: the model field has been renamed with System z9
	50	* to model_capacity and a new model field has been added
	51	* after the plant field. To avoid confusing older programs
	52	* the "Model:" prints "model_capacity model" or just
	53	* "model_capacity" if the model string is empty .
	54	*/
	55	len += sprintf(page + len,
	56	"Model: %-16.16s %-16.16s\n",
	57	info->model_capacity, info->model);
	58	else
	59	len += sprintf(page + len, "Model: %-16.16s\n",
	60	info->model_capacity);
	61	len += sprintf(page + len, "Sequence Code: %-16.16s\n",
	62	info->sequence);
	63	len += sprintf(page + len, "Plant: %-4.4s\n",
	64	info->plant);
cbce70e6 MS	65	len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n",
	66	info->model_capacity, (u32 ) info->model_cap_rating);
	67	if (info->model_perm_cap[0] != '\0')
	68	len += sprintf(page + len,
	69	"Model Perm. Capacity: %-16.16s %08u\n",
	70	info->model_perm_cap,
	71	(u32 ) info->model_perm_cap_rating);
	72	if (info->model_temp_cap[0] != '\0')
	73	len += sprintf(page + len,
	74	"Model Temp. Capacity: %-16.16s %08u\n",
	75	info->model_temp_cap,
	76	(u32 ) info->model_temp_cap_rating);
7aca2eda HC	77	if (info->cai) {
	78	len += sprintf(page + len,
	79	"Capacity Adj. Ind.: %d\n",
	80	info->cai);
	81	len += sprintf(page + len, "Capacity Ch. Reason: %d\n",
	82	info->ccr);
	83	}
0fee644a	84	return len;
1da177e4 LT	85	}
1da177e4 LT	86
0fee644a	87	static int stsi_1_2_2(struct sysinfo_1_2_2 info, char page, int len)
1da177e4	88	{
0fee644a MS	89	struct sysinfo_1_2_2_extension *ext;
	90	int i;
	91
	92	if (stsi(info, 1, 2, 2) == -ENOSYS)
	93	return len;
	94	ext = (struct sysinfo_1_2_2_extension *)
	95	((unsigned long) info + info->acc_offset);
	96
	97	len += sprintf(page + len, "\n");
	98	len += sprintf(page + len, "CPUs Total: %d\n",
	99	info->cpus_total);
	100	len += sprintf(page + len, "CPUs Configured: %d\n",
	101	info->cpus_configured);
	102	len += sprintf(page + len, "CPUs Standby: %d\n",
	103	info->cpus_standby);
	104	len += sprintf(page + len, "CPUs Reserved: %d\n",
	105	info->cpus_reserved);
	106
	107	if (info->format == 1) {
	108	/*
	109	* Sigh 2. According to the specification the alternate
	110	* capability field is a 32 bit floating point number
	111	* if the higher order 8 bits are not zero. Printing
	112	* a floating point number in the kernel is a no-no,
	113	* always print the number as 32 bit unsigned integer.
31ee4b2f	114	* The user-space needs to know about the strange
0fee644a MS	115	* encoding of the alternate cpu capability.
	116	*/
	117	len += sprintf(page + len, "Capability: %u %u\n",
	118	info->capability, ext->alt_capability);
	119	for (i = 2; i <= info->cpus_total; i++)
	120	len += sprintf(page + len,
	121	"Adjustment %02d-way: %u %u\n",
	122	i, info->adjustment[i-2],
	123	ext->alt_adjustment[i-2]);
	124
	125	} else {
	126	len += sprintf(page + len, "Capability: %u\n",
	127	info->capability);
	128	for (i = 2; i <= info->cpus_total; i++)
	129	len += sprintf(page + len,
	130	"Adjustment %02d-way: %u\n",
	131	i, info->adjustment[i-2]);
	132	}
	133
	134	if (info->secondary_capability != 0)
	135	len += sprintf(page + len, "Secondary Capability: %d\n",
	136	info->secondary_capability);
0fee644a	137	return len;
1da177e4 LT	138	}
1da177e4 LT	139
0fee644a	140	static int stsi_2_2_2(struct sysinfo_2_2_2 info, char page, int len)
1da177e4	141	{
0fee644a MS	142	if (stsi(info, 2, 2, 2) == -ENOSYS)
	143	return len;
	144
94f5b09d	145	EBCASC(info->name, sizeof(info->name));
0fee644a MS	146
	147	len += sprintf(page + len, "\n");
	148	len += sprintf(page + len, "LPAR Number: %d\n",
	149	info->lpar_number);
	150
	151	len += sprintf(page + len, "LPAR Characteristics: ");
	152	if (info->characteristics & LPAR_CHAR_DEDICATED)
	153	len += sprintf(page + len, "Dedicated ");
	154	if (info->characteristics & LPAR_CHAR_SHARED)
	155	len += sprintf(page + len, "Shared ");
	156	if (info->characteristics & LPAR_CHAR_LIMITED)
	157	len += sprintf(page + len, "Limited ");
	158	len += sprintf(page + len, "\n");
	159
	160	len += sprintf(page + len, "LPAR Name: %-8.8s\n",
	161	info->name);
	162
	163	len += sprintf(page + len, "LPAR Adjustment: %d\n",
	164	info->caf);
	165
	166	len += sprintf(page + len, "LPAR CPUs Total: %d\n",
	167	info->cpus_total);
	168	len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
	169	info->cpus_configured);
	170	len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
	171	info->cpus_standby);
	172	len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
	173	info->cpus_reserved);
	174	len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
	175	info->cpus_dedicated);
	176	len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
	177	info->cpus_shared);
	178	return len;
1da177e4 LT	179	}
1da177e4 LT	180
0fee644a	181	static int stsi_3_2_2(struct sysinfo_3_2_2 info, char page, int len)
1da177e4	182	{
0fee644a MS	183	int i;
	184
	185	if (stsi(info, 3, 2, 2) == -ENOSYS)
	186	return len;
	187	for (i = 0; i < info->count; i++) {
94f5b09d HC	188	EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
94f5b09d HC	189	EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
0fee644a MS	190	len += sprintf(page + len, "\n");
	191	len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
	192	i, info->vm[i].name);
	193	len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
	194	i, info->vm[i].cpi);
	195
	196	len += sprintf(page + len, "VM%02d Adjustment: %d\n",
	197	i, info->vm[i].caf);
	198
	199	len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
	200	i, info->vm[i].cpus_total);
	201	len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
	202	i, info->vm[i].cpus_configured);
	203	len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
	204	i, info->vm[i].cpus_standby);
	205	len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
	206	i, info->vm[i].cpus_reserved);
1da177e4	207	}
0fee644a	208	return len;
1da177e4 LT	209	}
1da177e4 LT	210
1da177e4	211	static int proc_read_sysinfo(char page, char *start,
94f5b09d HC	212	off_t off, int count,
94f5b09d HC	213	int eof, void data)
1da177e4	214	{
94f5b09d	215	unsigned long info = get_zeroed_page(GFP_KERNEL);
0fee644a	216	int level, len;
94f5b09d	217
1da177e4 LT	218	if (!info)
	219	return 0;
	220
0fee644a MS	221	len = 0;
	222	level = stsi_0();
	223	if (level >= 1)
	224	len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
1da177e4	225
0fee644a MS	226	if (level >= 1)
0fee644a MS	227	len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
1da177e4	228
0fee644a MS	229	if (level >= 2)
0fee644a MS	230	len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
1da177e4	231
0fee644a MS	232	if (level >= 3)
0fee644a MS	233	len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
1da177e4	234
94f5b09d HC	235	free_page(info);
94f5b09d HC	236	return len;
1da177e4 LT	237	}
	238
	239	static __init int create_proc_sysinfo(void)
	240	{
0fee644a MS	241	create_proc_read_entry("sysinfo", 0444, NULL,
0fee644a MS	242	proc_read_sysinfo, NULL);
1da177e4 LT	243	return 0;
1da177e4 LT	244	}
94f5b09d	245	device_initcall(create_proc_sysinfo);
1da177e4	246
6bcac508 MS	247	/*
	248	* Service levels interface.
	249	*/
	250
	251	static DECLARE_RWSEM(service_level_sem);
	252	static LIST_HEAD(service_level_list);
	253
	254	int register_service_level(struct service_level *slr)
	255	{
	256	struct service_level *ptr;
	257
	258	down_write(&service_level_sem);
	259	list_for_each_entry(ptr, &service_level_list, list)
	260	if (ptr == slr) {
	261	up_write(&service_level_sem);
	262	return -EEXIST;
	263	}
	264	list_add_tail(&slr->list, &service_level_list);
	265	up_write(&service_level_sem);
	266	return 0;
	267	}
	268	EXPORT_SYMBOL(register_service_level);
	269
	270	int unregister_service_level(struct service_level *slr)
	271	{
	272	struct service_level ptr, next;
	273	int rc = -ENOENT;
	274
	275	down_write(&service_level_sem);
	276	list_for_each_entry_safe(ptr, next, &service_level_list, list) {
	277	if (ptr != slr)
	278	continue;
	279	list_del(&ptr->list);
	280	rc = 0;
	281	break;
	282	}
	283	up_write(&service_level_sem);
	284	return rc;
	285	}
	286	EXPORT_SYMBOL(unregister_service_level);
	287
	288	static void service_level_start(struct seq_file m, loff_t *pos)
	289	{
	290	down_read(&service_level_sem);
	291	return seq_list_start(&service_level_list, *pos);
	292	}
	293
	294	static void service_level_next(struct seq_file m, void p, loff_t pos)
	295	{
	296	return seq_list_next(p, &service_level_list, pos);
	297	}
	298
	299	static void service_level_stop(struct seq_file m, void p)
	300	{
	301	up_read(&service_level_sem);
	302	}
	303
	304	static int service_level_show(struct seq_file m, void p)
	305	{
	306	struct service_level *slr;
	307
	308	slr = list_entry(p, struct service_level, list);
	309	slr->seq_print(m, slr);
	310	return 0;
311	}
312
313	static const struct seq_operations service_level_seq_ops = {
314	.start = service_level_start,
315	.next = service_level_next,
316	.stop = service_level_stop,
317	.show = service_level_show
318	};
319
320	static int service_level_open(struct inode inode, struct file file)
321	{
322	return seq_open(file, &service_level_seq_ops);
323	}
324
325	static const struct file_operations service_level_ops = {
326	.open = service_level_open,
327	.read = seq_read,
328	.llseek = seq_lseek,
329	.release = seq_release
330	};
331
332	static void service_level_vm_print(struct seq_file *m,
333	struct service_level *slr)
334	{
335	char query_buffer, str;
336
337	query_buffer = kmalloc(1024, GFP_KERNEL \| GFP_DMA);
338	if (!query_buffer)
339	return;
340	cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
341	str = strchr(query_buffer, '\n');
342	if (str)
343	*str = 0;
344	seq_printf(m, "VM: %s\n", query_buffer);
345	kfree(query_buffer);
346	}
347
348	static struct service_level service_level_vm = {
349	.seq_print = service_level_vm_print
350	};
351
352	static __init int create_proc_service_level(void)
353	{
354	proc_create("service_levels", 0, NULL, &service_level_ops);
355	if (MACHINE_IS_VM)
356	register_service_level(&service_level_vm);
357	return 0;
358	}
6bcac508 MS	359	subsys_initcall(create_proc_service_level);
	360
	361	/*
	362	* Bogomips calculation based on cpu capability.
	363	*/
2fc2d1e9 HC	364	int get_cpu_capability(unsigned int *capability)
	365	{
	366	struct sysinfo_1_2_2 *info;
	367	int rc;
	368
	369	info = (void *) get_zeroed_page(GFP_KERNEL);
	370	if (!info)
	371	return -ENOMEM;
	372	rc = stsi(info, 1, 2, 2);
	373	if (rc == -ENOSYS)
	374	goto out;
	375	rc = 0;
	376	*capability = info->capability;
	377	out:
	378	free_page((unsigned long) info);
	379	return rc;
	380	}
	381
31ee4b2f MS	382	/*
	383	* CPU capability might have changed. Therefore recalculate loops_per_jiffy.
	384	*/
	385	void s390_adjust_jiffies(void)
	386	{
	387	struct sysinfo_1_2_2 *info;
	388	const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
	389	FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
	390	FP_DECL_EX;
	391	unsigned int capability;
	392
	393	info = (void *) get_zeroed_page(GFP_KERNEL);
	394	if (!info)
	395	return;
	396
	397	if (stsi(info, 1, 2, 2) != -ENOSYS) {
	398	/*
	399	* Major sigh. The cpu capability encoding is "special".
	400	* If the first 9 bits of info->capability are 0 then it
	401	* is a 32 bit unsigned integer in the range 0 .. 2^23.
	402	* If the first 9 bits are != 0 then it is a 32 bit float.
	403	* In addition a lower value indicates a proportionally
	404	* higher cpu capacity. Bogomips are the other way round.
	405	* To get to a halfway suitable number we divide 1e7
	406	* by the cpu capability number. Yes, that means a floating
	407	* point division .. math-emu here we come :-)
	408	*/
	409	FP_UNPACK_SP(SA, &fmil);
	410	if ((info->capability >> 23) == 0)
	411	FP_FROM_INT_S(SB, info->capability, 32, int);
	412	else
	413	FP_UNPACK_SP(SB, &info->capability);
	414	FP_DIV_S(SR, SA, SB);
	415	FP_TO_INT_S(capability, SR, 32, 0);
	416	} else
	417	/*
	418	* Really old machine without stsi block for basic
	419	* cpu information. Report 42.0 bogomips.
	420	*/
	421	capability = 42;
	422	loops_per_jiffy = capability * (500000/HZ);
	423	free_page((unsigned long) info);
	424	}
	425
	426	/*
	427	* calibrate the delay loop
	428	*/
6c81c32f	429	void __cpuinit calibrate_delay(void)
31ee4b2f MS	430	{
	431	s390_adjust_jiffies();
	432	/* Print the good old Bogomips line .. */
	433	printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
	434	"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
	435	(loops_per_jiffy/(5000/HZ)) % 100);
	436	}