summaryrefslogtreecommitdiff
path: root/arch/s390/kernel/diag.c
blob: 4ddb5200ddf0a0f457cde957f49b791715e91ed6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*
 * Implementation of s390 diagnose codes
 *
 * Copyright IBM Corp. 2007
 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
 */

#include <linux/module.h>
#include <linux/cpu.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <asm/diag.h>

DEFINE_PER_CPU(struct diag_stat, diag_stat);
EXPORT_PER_CPU_SYMBOL(diag_stat);

struct diag_desc {
	int code;
	char *name;
};

static const struct diag_desc diag_map[NR_DIAG_STAT] = {
	[DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
	[DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
	[DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
	[DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
	[DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
	[DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
	[DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
	[DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
	[DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
	[DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
	[DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
	[DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
	[DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
	[DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
	[DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
	[DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
	[DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
	[DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
	[DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
};

static int show_diag_stat(struct seq_file *m, void *v)
{
	struct diag_stat *stat;
	unsigned long n = (unsigned long) v - 1;
	int cpu, prec, tmp;

	get_online_cpus();
	if (n == 0) {
		seq_puts(m, "         ");

		for_each_online_cpu(cpu) {
			prec = 10;
			for (tmp = 10; cpu >= tmp; tmp *= 10)
				prec--;
			seq_printf(m, "%*s%d", prec, "CPU", cpu);
		}
		seq_putc(m, '\n');
	} else if (n <= NR_DIAG_STAT) {
		seq_printf(m, "diag %03x:", diag_map[n-1].code);
		for_each_online_cpu(cpu) {
			stat = &per_cpu(diag_stat, cpu);
			seq_printf(m, " %10u", stat->counter[n-1]);
		}
		seq_printf(m, "    %s\n", diag_map[n-1].name);
	}
	put_online_cpus();
	return 0;
}

static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
{
	return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
}

static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
{
	++*pos;
	return show_diag_stat_start(m, pos);
}

static void show_diag_stat_stop(struct seq_file *m, void *v)
{
}

static const struct seq_operations show_diag_stat_sops = {
	.start	= show_diag_stat_start,
	.next	= show_diag_stat_next,
	.stop	= show_diag_stat_stop,
	.show	= show_diag_stat,
};

static int show_diag_stat_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &show_diag_stat_sops);
}

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


static int __init show_diag_stat_init(void)
{
	debugfs_create_file("diag_stat", 0400, NULL, NULL,
			    &show_diag_stat_fops);
	return 0;
}

device_initcall(show_diag_stat_init);

/*
 * Diagnose 14: Input spool file manipulation
 */
static inline int __diag14(unsigned long rx, unsigned long ry1,
			   unsigned long subcode)
{
	register unsigned long _ry1 asm("2") = ry1;
	register unsigned long _ry2 asm("3") = subcode;
	int rc = 0;

	asm volatile(
		"   sam31\n"
		"   diag    %2,2,0x14\n"
		"   sam64\n"
		"   ipm     %0\n"
		"   srl     %0,28\n"
		: "=d" (rc), "+d" (_ry2)
		: "d" (rx), "d" (_ry1)
		: "cc");

	return rc;
}

int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
{
	diag_stat_inc(DIAG_STAT_X014);
	return __diag14(rx, ry1, subcode);
}
EXPORT_SYMBOL(diag14);

/*
 * Diagnose 210: Get information about a virtual device
 */
int diag210(struct diag210 *addr)
{
	/*
	 * diag 210 needs its data below the 2GB border, so we
	 * use a static data area to be sure
	 */
	static struct diag210 diag210_tmp;
	static DEFINE_SPINLOCK(diag210_lock);
	unsigned long flags;
	int ccode;

	spin_lock_irqsave(&diag210_lock, flags);
	diag210_tmp = *addr;

	diag_stat_inc(DIAG_STAT_X210);
	asm volatile(
		"	lhi	%0,-1\n"
		"	sam31\n"
		"	diag	%1,0,0x210\n"
		"0:	ipm	%0\n"
		"	srl	%0,28\n"
		"1:	sam64\n"
		EX_TABLE(0b, 1b)
		: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");

	*addr = diag210_tmp;
	spin_unlock_irqrestore(&diag210_lock, flags);

	return ccode;
}
EXPORT_SYMBOL(diag210);