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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#include <asm/sections.h>
17
18struct diag_stat {
19 unsigned int counter[NR_DIAG_STAT];
20};
21
22static DEFINE_PER_CPU(struct diag_stat, diag_stat);
23
24struct diag_desc {
25 int code;
26 char *name;
27};
28
29static const struct diag_desc diag_map[NR_DIAG_STAT] = {
30 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
31 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
32 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
33 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
34 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
35 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
36 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
37 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
38 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
39 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
40 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
41 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
42 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
43 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
44 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
45 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
46 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
47 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
48 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
49 [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
50 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
51};
52
53struct diag_ops __bootdata_preserved(diag_dma_ops);
54struct diag210 *__bootdata_preserved(__diag210_tmp_dma);
55
56static int show_diag_stat(struct seq_file *m, void *v)
57{
58 struct diag_stat *stat;
59 unsigned long n = (unsigned long) v - 1;
60 int cpu, prec, tmp;
61
62 get_online_cpus();
63 if (n == 0) {
64 seq_puts(m, " ");
65
66 for_each_online_cpu(cpu) {
67 prec = 10;
68 for (tmp = 10; cpu >= tmp; tmp *= 10)
69 prec--;
70 seq_printf(m, "%*s%d", prec, "CPU", cpu);
71 }
72 seq_putc(m, '\n');
73 } else if (n <= NR_DIAG_STAT) {
74 seq_printf(m, "diag %03x:", diag_map[n-1].code);
75 for_each_online_cpu(cpu) {
76 stat = &per_cpu(diag_stat, cpu);
77 seq_printf(m, " %10u", stat->counter[n-1]);
78 }
79 seq_printf(m, " %s\n", diag_map[n-1].name);
80 }
81 put_online_cpus();
82 return 0;
83}
84
85static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
86{
87 return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
88}
89
90static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
91{
92 ++*pos;
93 return show_diag_stat_start(m, pos);
94}
95
96static void show_diag_stat_stop(struct seq_file *m, void *v)
97{
98}
99
100static const struct seq_operations show_diag_stat_sops = {
101 .start = show_diag_stat_start,
102 .next = show_diag_stat_next,
103 .stop = show_diag_stat_stop,
104 .show = show_diag_stat,
105};
106
107static int show_diag_stat_open(struct inode *inode, struct file *file)
108{
109 return seq_open(file, &show_diag_stat_sops);
110}
111
112static const struct file_operations show_diag_stat_fops = {
113 .open = show_diag_stat_open,
114 .read = seq_read,
115 .llseek = seq_lseek,
116 .release = seq_release,
117};
118
119
120static int __init show_diag_stat_init(void)
121{
122 debugfs_create_file("diag_stat", 0400, NULL, NULL,
123 &show_diag_stat_fops);
124 return 0;
125}
126
127device_initcall(show_diag_stat_init);
128
129void diag_stat_inc(enum diag_stat_enum nr)
130{
131 this_cpu_inc(diag_stat.counter[nr]);
132 trace_s390_diagnose(diag_map[nr].code);
133}
134EXPORT_SYMBOL(diag_stat_inc);
135
136void diag_stat_inc_norecursion(enum diag_stat_enum nr)
137{
138 this_cpu_inc(diag_stat.counter[nr]);
139 trace_s390_diagnose_norecursion(diag_map[nr].code);
140}
141EXPORT_SYMBOL(diag_stat_inc_norecursion);
142
143
144
145
146int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
147{
148 diag_stat_inc(DIAG_STAT_X014);
149 return diag_dma_ops.diag14(rx, ry1, subcode);
150}
151EXPORT_SYMBOL(diag14);
152
153static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
154{
155 register unsigned long _subcode asm("0") = *subcode;
156 register unsigned long _size asm("1") = size;
157
158 asm volatile(
159 " diag %2,%0,0x204\n"
160 "0: nopr %%r7\n"
161 EX_TABLE(0b,0b)
162 : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
163 *subcode = _subcode;
164 return _size;
165}
166
167int diag204(unsigned long subcode, unsigned long size, void *addr)
168{
169 diag_stat_inc(DIAG_STAT_X204);
170 size = __diag204(&subcode, size, addr);
171 if (subcode)
172 return -1;
173 return size;
174}
175EXPORT_SYMBOL(diag204);
176
177
178
179
180int diag210(struct diag210 *addr)
181{
182 static DEFINE_SPINLOCK(diag210_lock);
183 unsigned long flags;
184 int ccode;
185
186 spin_lock_irqsave(&diag210_lock, flags);
187 *__diag210_tmp_dma = *addr;
188
189 diag_stat_inc(DIAG_STAT_X210);
190 ccode = diag_dma_ops.diag210(__diag210_tmp_dma);
191
192 *addr = *__diag210_tmp_dma;
193 spin_unlock_irqrestore(&diag210_lock, flags);
194
195 return ccode;
196}
197EXPORT_SYMBOL(diag210);
198
199int diag224(void *ptr)
200{
201 int rc = -EOPNOTSUPP;
202
203 diag_stat_inc(DIAG_STAT_X224);
204 asm volatile(
205 " diag %1,%2,0x224\n"
206 "0: lhi %0,0x0\n"
207 "1:\n"
208 EX_TABLE(0b,1b)
209 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
210 return rc;
211}
212EXPORT_SYMBOL(diag224);
213
214
215
216
217int diag26c(void *req, void *resp, enum diag26c_sc subcode)
218{
219 diag_stat_inc(DIAG_STAT_X26C);
220 return diag_dma_ops.diag26c(req, resp, subcode);
221}
222EXPORT_SYMBOL(diag26c);
223
