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9#include <linux/export.h>
10#include <linux/init.h>
11#include <linux/cpu.h>
12#include <linux/seq_file.h>
13#include <linux/debugfs.h>
14#include <asm/diag.h>
15#include <asm/trace/diag.h>
16
17struct diag_stat {
18 unsigned int counter[NR_DIAG_STAT];
19};
20
21static DEFINE_PER_CPU(struct diag_stat, diag_stat);
22
23struct diag_desc {
24 int code;
25 char *name;
26};
27
28static const struct diag_desc diag_map[NR_DIAG_STAT] = {
29 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
30 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
31 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
32 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
33 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
34 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
35 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
36 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
37 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
38 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
39 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
40 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
41 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
42 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
43 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
44 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
45 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
46 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
47 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
48 [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
49 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
50};
51
52static int show_diag_stat(struct seq_file *m, void *v)
53{
54 struct diag_stat *stat;
55 unsigned long n = (unsigned long) v - 1;
56 int cpu, prec, tmp;
57
58 get_online_cpus();
59 if (n == 0) {
60 seq_puts(m, " ");
61
62 for_each_online_cpu(cpu) {
63 prec = 10;
64 for (tmp = 10; cpu >= tmp; tmp *= 10)
65 prec--;
66 seq_printf(m, "%*s%d", prec, "CPU", cpu);
67 }
68 seq_putc(m, '\n');
69 } else if (n <= NR_DIAG_STAT) {
70 seq_printf(m, "diag %03x:", diag_map[n-1].code);
71 for_each_online_cpu(cpu) {
72 stat = &per_cpu(diag_stat, cpu);
73 seq_printf(m, " %10u", stat->counter[n-1]);
74 }
75 seq_printf(m, " %s\n", diag_map[n-1].name);
76 }
77 put_online_cpus();
78 return 0;
79}
80
81static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
82{
83 return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
84}
85
86static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
87{
88 ++*pos;
89 return show_diag_stat_start(m, pos);
90}
91
92static void show_diag_stat_stop(struct seq_file *m, void *v)
93{
94}
95
96static const struct seq_operations show_diag_stat_sops = {
97 .start = show_diag_stat_start,
98 .next = show_diag_stat_next,
99 .stop = show_diag_stat_stop,
100 .show = show_diag_stat,
101};
102
103static int show_diag_stat_open(struct inode *inode, struct file *file)
104{
105 return seq_open(file, &show_diag_stat_sops);
106}
107
108static const struct file_operations show_diag_stat_fops = {
109 .open = show_diag_stat_open,
110 .read = seq_read,
111 .llseek = seq_lseek,
112 .release = seq_release,
113};
114
115
116static int __init show_diag_stat_init(void)
117{
118 debugfs_create_file("diag_stat", 0400, NULL, NULL,
119 &show_diag_stat_fops);
120 return 0;
121}
122
123device_initcall(show_diag_stat_init);
124
125void diag_stat_inc(enum diag_stat_enum nr)
126{
127 this_cpu_inc(diag_stat.counter[nr]);
128 trace_s390_diagnose(diag_map[nr].code);
129}
130EXPORT_SYMBOL(diag_stat_inc);
131
132void diag_stat_inc_norecursion(enum diag_stat_enum nr)
133{
134 this_cpu_inc(diag_stat.counter[nr]);
135 trace_s390_diagnose_norecursion(diag_map[nr].code);
136}
137EXPORT_SYMBOL(diag_stat_inc_norecursion);
138
139
140
141
142static inline int __diag14(unsigned long rx, unsigned long ry1,
143 unsigned long subcode)
144{
145 register unsigned long _ry1 asm("2") = ry1;
146 register unsigned long _ry2 asm("3") = subcode;
147 int rc = 0;
148
149 asm volatile(
150 " sam31\n"
151 " diag %2,2,0x14\n"
152 " sam64\n"
153 " ipm %0\n"
154 " srl %0,28\n"
155 : "=d" (rc), "+d" (_ry2)
156 : "d" (rx), "d" (_ry1)
157 : "cc");
158
159 return rc;
160}
161
162int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
163{
164 diag_stat_inc(DIAG_STAT_X014);
165 return __diag14(rx, ry1, subcode);
166}
167EXPORT_SYMBOL(diag14);
168
169static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
170{
171 register unsigned long _subcode asm("0") = *subcode;
172 register unsigned long _size asm("1") = size;
173
174 asm volatile(
175 " diag %2,%0,0x204\n"
176 "0: nopr %%r7\n"
177 EX_TABLE(0b,0b)
178 : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
179 *subcode = _subcode;
180 return _size;
181}
182
183int diag204(unsigned long subcode, unsigned long size, void *addr)
184{
185 diag_stat_inc(DIAG_STAT_X204);
186 size = __diag204(&subcode, size, addr);
187 if (subcode)
188 return -1;
189 return size;
190}
191EXPORT_SYMBOL(diag204);
192
193
194
195
196int diag210(struct diag210 *addr)
197{
198
199
200
201
202 static struct diag210 diag210_tmp;
203 static DEFINE_SPINLOCK(diag210_lock);
204 unsigned long flags;
205 int ccode;
206
207 spin_lock_irqsave(&diag210_lock, flags);
208 diag210_tmp = *addr;
209
210 diag_stat_inc(DIAG_STAT_X210);
211 asm volatile(
212 " lhi %0,-1\n"
213 " sam31\n"
214 " diag %1,0,0x210\n"
215 "0: ipm %0\n"
216 " srl %0,28\n"
217 "1: sam64\n"
218 EX_TABLE(0b, 1b)
219 : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
220
221 *addr = diag210_tmp;
222 spin_unlock_irqrestore(&diag210_lock, flags);
223
224 return ccode;
225}
226EXPORT_SYMBOL(diag210);
227
228int diag224(void *ptr)
229{
230 int rc = -EOPNOTSUPP;
231
232 diag_stat_inc(DIAG_STAT_X224);
233 asm volatile(
234 " diag %1,%2,0x224\n"
235 "0: lhi %0,0x0\n"
236 "1:\n"
237 EX_TABLE(0b,1b)
238 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
239 return rc;
240}
241EXPORT_SYMBOL(diag224);
242
243
244
245
246static inline int __diag26c(void *req, void *resp, enum diag26c_sc subcode)
247{
248 register unsigned long _req asm("2") = (addr_t) req;
249 register unsigned long _resp asm("3") = (addr_t) resp;
250 register unsigned long _subcode asm("4") = subcode;
251 register unsigned long _rc asm("5") = -EOPNOTSUPP;
252
253 asm volatile(
254 " sam31\n"
255 " diag %[rx],%[ry],0x26c\n"
256 "0: sam64\n"
257 EX_TABLE(0b,0b)
258 : "+d" (_rc)
259 : [rx] "d" (_req), "d" (_resp), [ry] "d" (_subcode)
260 : "cc", "memory");
261 return _rc;
262}
263
264int diag26c(void *req, void *resp, enum diag26c_sc subcode)
265{
266 diag_stat_inc(DIAG_STAT_X26C);
267 return __diag26c(req, resp, subcode);
268}
269EXPORT_SYMBOL(diag26c);
270
