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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
0a87c5cf MH |
2 | /* |
3 | * Implementation of s390 diagnose codes | |
4 | * | |
5 | * Copyright IBM Corp. 2007 | |
6 | * Author(s): Michael Holzheu <holzheu@de.ibm.com> | |
7 | */ | |
8 | ||
3994a52b PG |
9 | #include <linux/export.h> |
10 | #include <linux/init.h> | |
1ec2772e MS |
11 | #include <linux/cpu.h> |
12 | #include <linux/seq_file.h> | |
13 | #include <linux/debugfs.h> | |
0a87c5cf | 14 | #include <asm/diag.h> |
b5a6b71b | 15 | #include <asm/trace/diag.h> |
0a87c5cf | 16 | |
b5a6b71b MS |
17 | struct diag_stat { |
18 | unsigned int counter[NR_DIAG_STAT]; | |
19 | }; | |
20 | ||
21 | static DEFINE_PER_CPU(struct diag_stat, diag_stat); | |
1ec2772e MS |
22 | |
23 | struct diag_desc { | |
24 | int code; | |
25 | char *name; | |
26 | }; | |
27 | ||
28 | static 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" }, | |
1b030478 | 42 | [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" }, |
1ec2772e MS |
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_X500] = { .code = 0x500, .name = "Virtio Service" }, | |
49 | }; | |
50 | ||
51 | static int show_diag_stat(struct seq_file *m, void *v) | |
52 | { | |
53 | struct diag_stat *stat; | |
54 | unsigned long n = (unsigned long) v - 1; | |
55 | int cpu, prec, tmp; | |
56 | ||
57 | get_online_cpus(); | |
58 | if (n == 0) { | |
59 | seq_puts(m, " "); | |
60 | ||
61 | for_each_online_cpu(cpu) { | |
62 | prec = 10; | |
63 | for (tmp = 10; cpu >= tmp; tmp *= 10) | |
64 | prec--; | |
65 | seq_printf(m, "%*s%d", prec, "CPU", cpu); | |
66 | } | |
67 | seq_putc(m, '\n'); | |
68 | } else if (n <= NR_DIAG_STAT) { | |
69 | seq_printf(m, "diag %03x:", diag_map[n-1].code); | |
70 | for_each_online_cpu(cpu) { | |
71 | stat = &per_cpu(diag_stat, cpu); | |
72 | seq_printf(m, " %10u", stat->counter[n-1]); | |
73 | } | |
74 | seq_printf(m, " %s\n", diag_map[n-1].name); | |
75 | } | |
76 | put_online_cpus(); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static void *show_diag_stat_start(struct seq_file *m, loff_t *pos) | |
81 | { | |
82 | return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL; | |
83 | } | |
84 | ||
85 | static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos) | |
86 | { | |
87 | ++*pos; | |
88 | return show_diag_stat_start(m, pos); | |
89 | } | |
90 | ||
91 | static void show_diag_stat_stop(struct seq_file *m, void *v) | |
92 | { | |
93 | } | |
94 | ||
95 | static const struct seq_operations show_diag_stat_sops = { | |
96 | .start = show_diag_stat_start, | |
97 | .next = show_diag_stat_next, | |
98 | .stop = show_diag_stat_stop, | |
99 | .show = show_diag_stat, | |
100 | }; | |
101 | ||
102 | static int show_diag_stat_open(struct inode *inode, struct file *file) | |
103 | { | |
104 | return seq_open(file, &show_diag_stat_sops); | |
105 | } | |
106 | ||
107 | static const struct file_operations show_diag_stat_fops = { | |
108 | .open = show_diag_stat_open, | |
109 | .read = seq_read, | |
110 | .llseek = seq_lseek, | |
111 | .release = seq_release, | |
112 | }; | |
113 | ||
114 | ||
115 | static int __init show_diag_stat_init(void) | |
116 | { | |
117 | debugfs_create_file("diag_stat", 0400, NULL, NULL, | |
118 | &show_diag_stat_fops); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | device_initcall(show_diag_stat_init); | |
123 | ||
b5a6b71b MS |
124 | void diag_stat_inc(enum diag_stat_enum nr) |
125 | { | |
126 | this_cpu_inc(diag_stat.counter[nr]); | |
230ccb37 | 127 | trace_s390_diagnose(diag_map[nr].code); |
b5a6b71b MS |
128 | } |
129 | EXPORT_SYMBOL(diag_stat_inc); | |
130 | ||
131 | void diag_stat_inc_norecursion(enum diag_stat_enum nr) | |
132 | { | |
133 | this_cpu_inc(diag_stat.counter[nr]); | |
230ccb37 | 134 | trace_s390_diagnose_norecursion(diag_map[nr].code); |
b5a6b71b MS |
135 | } |
136 | EXPORT_SYMBOL(diag_stat_inc_norecursion); | |
137 | ||
0a87c5cf MH |
138 | /* |
139 | * Diagnose 14: Input spool file manipulation | |
140 | */ | |
1ec2772e MS |
141 | static inline int __diag14(unsigned long rx, unsigned long ry1, |
142 | unsigned long subcode) | |
0a87c5cf MH |
143 | { |
144 | register unsigned long _ry1 asm("2") = ry1; | |
145 | register unsigned long _ry2 asm("3") = subcode; | |
146 | int rc = 0; | |
147 | ||
148 | asm volatile( | |
0a87c5cf MH |
149 | " sam31\n" |
150 | " diag %2,2,0x14\n" | |
151 | " sam64\n" | |
0a87c5cf MH |
152 | " ipm %0\n" |
153 | " srl %0,28\n" | |
154 | : "=d" (rc), "+d" (_ry2) | |
155 | : "d" (rx), "d" (_ry1) | |
156 | : "cc"); | |
157 | ||
158 | return rc; | |
159 | } | |
1ec2772e MS |
160 | |
161 | int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode) | |
162 | { | |
163 | diag_stat_inc(DIAG_STAT_X014); | |
164 | return __diag14(rx, ry1, subcode); | |
165 | } | |
0a87c5cf MH |
166 | EXPORT_SYMBOL(diag14); |
167 | ||
221bb8a4 | 168 | static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr) |
e65f30e0 | 169 | { |
221bb8a4 | 170 | register unsigned long _subcode asm("0") = *subcode; |
e65f30e0 JF |
171 | register unsigned long _size asm("1") = size; |
172 | ||
173 | asm volatile( | |
174 | " diag %2,%0,0x204\n" | |
221bb8a4 | 175 | "0: nopr %%r7\n" |
e65f30e0 JF |
176 | EX_TABLE(0b,0b) |
177 | : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory"); | |
221bb8a4 | 178 | *subcode = _subcode; |
e65f30e0 JF |
179 | return _size; |
180 | } | |
181 | ||
182 | int diag204(unsigned long subcode, unsigned long size, void *addr) | |
183 | { | |
184 | diag_stat_inc(DIAG_STAT_X204); | |
221bb8a4 LT |
185 | size = __diag204(&subcode, size, addr); |
186 | if (subcode) | |
187 | return -1; | |
188 | return size; | |
e65f30e0 JF |
189 | } |
190 | EXPORT_SYMBOL(diag204); | |
191 | ||
0a87c5cf MH |
192 | /* |
193 | * Diagnose 210: Get information about a virtual device | |
194 | */ | |
195 | int diag210(struct diag210 *addr) | |
196 | { | |
197 | /* | |
198 | * diag 210 needs its data below the 2GB border, so we | |
199 | * use a static data area to be sure | |
200 | */ | |
201 | static struct diag210 diag210_tmp; | |
202 | static DEFINE_SPINLOCK(diag210_lock); | |
203 | unsigned long flags; | |
204 | int ccode; | |
205 | ||
206 | spin_lock_irqsave(&diag210_lock, flags); | |
207 | diag210_tmp = *addr; | |
208 | ||
1ec2772e | 209 | diag_stat_inc(DIAG_STAT_X210); |
0a87c5cf MH |
210 | asm volatile( |
211 | " lhi %0,-1\n" | |
212 | " sam31\n" | |
213 | " diag %1,0,0x210\n" | |
214 | "0: ipm %0\n" | |
215 | " srl %0,28\n" | |
216 | "1: sam64\n" | |
217 | EX_TABLE(0b, 1b) | |
218 | : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory"); | |
0a87c5cf MH |
219 | |
220 | *addr = diag210_tmp; | |
221 | spin_unlock_irqrestore(&diag210_lock, flags); | |
222 | ||
223 | return ccode; | |
224 | } | |
225 | EXPORT_SYMBOL(diag210); | |
022bd2d1 JF |
226 | |
227 | int diag224(void *ptr) | |
228 | { | |
229 | int rc = -EOPNOTSUPP; | |
230 | ||
231 | diag_stat_inc(DIAG_STAT_X224); | |
232 | asm volatile( | |
233 | " diag %1,%2,0x224\n" | |
234 | "0: lhi %0,0x0\n" | |
235 | "1:\n" | |
236 | EX_TABLE(0b,1b) | |
237 | : "+d" (rc) :"d" (0), "d" (ptr) : "memory"); | |
238 | return rc; | |
239 | } | |
240 | EXPORT_SYMBOL(diag224); | |
1b030478 JW |
241 | |
242 | /* | |
243 | * Diagnose 26C: Access Certain System Information | |
244 | */ | |
245 | static inline int __diag26c(void *req, void *resp, enum diag26c_sc subcode) | |
246 | { | |
247 | register unsigned long _req asm("2") = (addr_t) req; | |
248 | register unsigned long _resp asm("3") = (addr_t) resp; | |
249 | register unsigned long _subcode asm("4") = subcode; | |
250 | register unsigned long _rc asm("5") = -EOPNOTSUPP; | |
251 | ||
252 | asm volatile( | |
253 | " sam31\n" | |
254 | " diag %[rx],%[ry],0x26c\n" | |
255 | "0: sam64\n" | |
256 | EX_TABLE(0b,0b) | |
257 | : "+d" (_rc) | |
258 | : [rx] "d" (_req), "d" (_resp), [ry] "d" (_subcode) | |
259 | : "cc", "memory"); | |
260 | return _rc; | |
261 | } | |
262 | ||
263 | int diag26c(void *req, void *resp, enum diag26c_sc subcode) | |
264 | { | |
265 | diag_stat_inc(DIAG_STAT_X26C); | |
266 | return __diag26c(req, resp, subcode); | |
267 | } | |
268 | EXPORT_SYMBOL(diag26c); |