1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Implementation of s390 diagnose codes
  4 *
  5 * Copyright IBM Corp. 2007
  6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
  7 */
  8
  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 * Diagnose 14: Input spool file manipulation
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 * Diagnose 210: Get information about a virtual device
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 * Diagnose 26C: Access Certain System Information
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);

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Implementation of s390 diagnose codes
  4 *
  5 * Copyright IBM Corp. 2007
  6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
  7 */
  8
  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_X500] = { .code = 0x500, .name = "Virtio Service" },
 49};
 50
 
 
 
 51static 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
 80static 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
 85static 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
 91static void show_diag_stat_stop(struct seq_file *m, void *v)
 92{
 93}
 94
 95static 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
102static int show_diag_stat_open(struct inode *inode, struct file *file)
103{
104	return seq_open(file, &show_diag_stat_sops);
105}
106
107static 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
115static 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
122device_initcall(show_diag_stat_init);
123
124void diag_stat_inc(enum diag_stat_enum nr)
125{
126	this_cpu_inc(diag_stat.counter[nr]);
127	trace_s390_diagnose(diag_map[nr].code);
128}
129EXPORT_SYMBOL(diag_stat_inc);
130
131void diag_stat_inc_norecursion(enum diag_stat_enum nr)
132{
133	this_cpu_inc(diag_stat.counter[nr]);
134	trace_s390_diagnose_norecursion(diag_map[nr].code);
135}
136EXPORT_SYMBOL(diag_stat_inc_norecursion);
137
138/*
139 * Diagnose 14: Input spool file manipulation
140 */
141static inline int __diag14(unsigned long rx, unsigned long ry1,
142			   unsigned long subcode)
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(
149		"   sam31\n"
150		"   diag    %2,2,0x14\n"
151		"   sam64\n"
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}
160
161int 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}
166EXPORT_SYMBOL(diag14);
167
168static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
169{
170	register unsigned long _subcode asm("0") = *subcode;
171	register unsigned long _size asm("1") = size;
172
173	asm volatile(
174		"	diag	%2,%0,0x204\n"
175		"0:	nopr	%%r7\n"
176		EX_TABLE(0b,0b)
177		: "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
178	*subcode = _subcode;
179	return _size;
180}
181
182int diag204(unsigned long subcode, unsigned long size, void *addr)
183{
184	diag_stat_inc(DIAG_STAT_X204);
185	size = __diag204(&subcode, size, addr);
186	if (subcode)
187		return -1;
188	return size;
189}
190EXPORT_SYMBOL(diag204);
191
192/*
193 * Diagnose 210: Get information about a virtual device
194 */
195int 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
209	diag_stat_inc(DIAG_STAT_X210);
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");
219
220	*addr = diag210_tmp;
221	spin_unlock_irqrestore(&diag210_lock, flags);
222
223	return ccode;
224}
225EXPORT_SYMBOL(diag210);
226
227int 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}
240EXPORT_SYMBOL(diag224);
241
242/*
243 * Diagnose 26C: Access Certain System Information
244 */
245static 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
263int diag26c(void *req, void *resp, enum diag26c_sc subcode)
264{
265	diag_stat_inc(DIAG_STAT_X26C);
266	return __diag26c(req, resp, subcode);
267}
268EXPORT_SYMBOL(diag26c);