1/*
 2 * Implementation of s390 diagnose codes
 3 *
 4 * Copyright IBM Corp. 2007
 5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
 6 */
 7
 8#include <linux/module.h>
 
 
 
 9#include <asm/diag.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10
11/*
12 * Diagnose 14: Input spool file manipulation
13 */
14int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
 
15{
16	register unsigned long _ry1 asm("2") = ry1;
17	register unsigned long _ry2 asm("3") = subcode;
18	int rc = 0;
19
20	asm volatile(
21#ifdef CONFIG_64BIT
22		"   sam31\n"
23		"   diag    %2,2,0x14\n"
24		"   sam64\n"
25#else
26		"   diag    %2,2,0x14\n"
27#endif
28		"   ipm     %0\n"
29		"   srl     %0,28\n"
30		: "=d" (rc), "+d" (_ry2)
31		: "d" (rx), "d" (_ry1)
32		: "cc");
33
34	return rc;
35}
 
 
 
 
 
 
36EXPORT_SYMBOL(diag14);
37
38/*
39 * Diagnose 210: Get information about a virtual device
40 */
41int diag210(struct diag210 *addr)
42{
43	/*
44	 * diag 210 needs its data below the 2GB border, so we
45	 * use a static data area to be sure
46	 */
47	static struct diag210 diag210_tmp;
48	static DEFINE_SPINLOCK(diag210_lock);
49	unsigned long flags;
50	int ccode;
51
52	spin_lock_irqsave(&diag210_lock, flags);
53	diag210_tmp = *addr;
54
55#ifdef CONFIG_64BIT
56	asm volatile(
57		"	lhi	%0,-1\n"
58		"	sam31\n"
59		"	diag	%1,0,0x210\n"
60		"0:	ipm	%0\n"
61		"	srl	%0,28\n"
62		"1:	sam64\n"
63		EX_TABLE(0b, 1b)
64		: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
65#else
66	asm volatile(
67		"	lhi	%0,-1\n"
68		"	diag	%1,0,0x210\n"
69		"0:	ipm	%0\n"
70		"	srl	%0,28\n"
71		"1:\n"
72		EX_TABLE(0b, 1b)
73		: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
74#endif
75
76	*addr = diag210_tmp;
77	spin_unlock_irqrestore(&diag210_lock, flags);
78
79	return ccode;
80}
81EXPORT_SYMBOL(diag210);

  1/*
  2 * Implementation of s390 diagnose codes
  3 *
  4 * Copyright IBM Corp. 2007
  5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
  6 */
  7
  8#include <linux/module.h>
  9#include <linux/cpu.h>
 10#include <linux/seq_file.h>
 11#include <linux/debugfs.h>
 12#include <asm/diag.h>
 13#include <asm/trace/diag.h>
 14
 15struct diag_stat {
 16	unsigned int counter[NR_DIAG_STAT];
 17};
 18
 19static DEFINE_PER_CPU(struct diag_stat, diag_stat);
 20
 21struct diag_desc {
 22	int code;
 23	char *name;
 24};
 25
 26static const struct diag_desc diag_map[NR_DIAG_STAT] = {
 27	[DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
 28	[DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
 29	[DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
 30	[DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
 31	[DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
 32	[DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
 33	[DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
 34	[DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
 35	[DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
 36	[DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
 37	[DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
 38	[DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
 39	[DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
 40	[DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
 41	[DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
 42	[DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
 43	[DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
 44	[DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
 45	[DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
 46};
 47
 48static int show_diag_stat(struct seq_file *m, void *v)
 49{
 50	struct diag_stat *stat;
 51	unsigned long n = (unsigned long) v - 1;
 52	int cpu, prec, tmp;
 53
 54	get_online_cpus();
 55	if (n == 0) {
 56		seq_puts(m, "         ");
 57
 58		for_each_online_cpu(cpu) {
 59			prec = 10;
 60			for (tmp = 10; cpu >= tmp; tmp *= 10)
 61				prec--;
 62			seq_printf(m, "%*s%d", prec, "CPU", cpu);
 63		}
 64		seq_putc(m, '\n');
 65	} else if (n <= NR_DIAG_STAT) {
 66		seq_printf(m, "diag %03x:", diag_map[n-1].code);
 67		for_each_online_cpu(cpu) {
 68			stat = &per_cpu(diag_stat, cpu);
 69			seq_printf(m, " %10u", stat->counter[n-1]);
 70		}
 71		seq_printf(m, "    %s\n", diag_map[n-1].name);
 72	}
 73	put_online_cpus();
 74	return 0;
 75}
 76
 77static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
 78{
 79	return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
 80}
 81
 82static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
 83{
 84	++*pos;
 85	return show_diag_stat_start(m, pos);
 86}
 87
 88static void show_diag_stat_stop(struct seq_file *m, void *v)
 89{
 90}
 91
 92static const struct seq_operations show_diag_stat_sops = {
 93	.start	= show_diag_stat_start,
 94	.next	= show_diag_stat_next,
 95	.stop	= show_diag_stat_stop,
 96	.show	= show_diag_stat,
 97};
 98
 99static int show_diag_stat_open(struct inode *inode, struct file *file)
100{
101	return seq_open(file, &show_diag_stat_sops);
102}
103
104static const struct file_operations show_diag_stat_fops = {
105	.open		= show_diag_stat_open,
106	.read		= seq_read,
107	.llseek		= seq_lseek,
108	.release	= seq_release,
109};
110
111
112static int __init show_diag_stat_init(void)
113{
114	debugfs_create_file("diag_stat", 0400, NULL, NULL,
115			    &show_diag_stat_fops);
116	return 0;
117}
118
119device_initcall(show_diag_stat_init);
120
121void diag_stat_inc(enum diag_stat_enum nr)
122{
123	this_cpu_inc(diag_stat.counter[nr]);
124	trace_s390_diagnose(diag_map[nr].code);
125}
126EXPORT_SYMBOL(diag_stat_inc);
127
128void diag_stat_inc_norecursion(enum diag_stat_enum nr)
129{
130	this_cpu_inc(diag_stat.counter[nr]);
131	trace_s390_diagnose_norecursion(diag_map[nr].code);
132}
133EXPORT_SYMBOL(diag_stat_inc_norecursion);
134
135/*
136 * Diagnose 14: Input spool file manipulation
137 */
138static inline int __diag14(unsigned long rx, unsigned long ry1,
139			   unsigned long subcode)
140{
141	register unsigned long _ry1 asm("2") = ry1;
142	register unsigned long _ry2 asm("3") = subcode;
143	int rc = 0;
144
145	asm volatile(
 
146		"   sam31\n"
147		"   diag    %2,2,0x14\n"
148		"   sam64\n"
 
 
 
149		"   ipm     %0\n"
150		"   srl     %0,28\n"
151		: "=d" (rc), "+d" (_ry2)
152		: "d" (rx), "d" (_ry1)
153		: "cc");
154
155	return rc;
156}
157
158int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
159{
160	diag_stat_inc(DIAG_STAT_X014);
161	return __diag14(rx, ry1, subcode);
162}
163EXPORT_SYMBOL(diag14);
164
165/*
166 * Diagnose 210: Get information about a virtual device
167 */
168int diag210(struct diag210 *addr)
169{
170	/*
171	 * diag 210 needs its data below the 2GB border, so we
172	 * use a static data area to be sure
173	 */
174	static struct diag210 diag210_tmp;
175	static DEFINE_SPINLOCK(diag210_lock);
176	unsigned long flags;
177	int ccode;
178
179	spin_lock_irqsave(&diag210_lock, flags);
180	diag210_tmp = *addr;
181
182	diag_stat_inc(DIAG_STAT_X210);
183	asm volatile(
184		"	lhi	%0,-1\n"
185		"	sam31\n"
186		"	diag	%1,0,0x210\n"
187		"0:	ipm	%0\n"
188		"	srl	%0,28\n"
189		"1:	sam64\n"
190		EX_TABLE(0b, 1b)
191		: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
 
 
 
 
 
 
 
 
 
 
192
193	*addr = diag210_tmp;
194	spin_unlock_irqrestore(&diag210_lock, flags);
195
196	return ccode;
197}
198EXPORT_SYMBOL(diag210);