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
165static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
166{
167	register unsigned long _subcode asm("0") = *subcode;
168	register unsigned long _size asm("1") = size;
169
170	asm volatile(
171		"	diag	%2,%0,0x204\n"
172		"0:	nopr	%%r7\n"
173		EX_TABLE(0b,0b)
174		: "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
175	*subcode = _subcode;
176	return _size;
177}
178
179int diag204(unsigned long subcode, unsigned long size, void *addr)
180{
181	diag_stat_inc(DIAG_STAT_X204);
182	size = __diag204(&subcode, size, addr);
183	if (subcode)
184		return -1;
185	return size;
186}
187EXPORT_SYMBOL(diag204);
188
189/*
190 * Diagnose 210: Get information about a virtual device
191 */
192int diag210(struct diag210 *addr)
193{
194	/*
195	 * diag 210 needs its data below the 2GB border, so we
196	 * use a static data area to be sure
197	 */
198	static struct diag210 diag210_tmp;
199	static DEFINE_SPINLOCK(diag210_lock);
200	unsigned long flags;
201	int ccode;
202
203	spin_lock_irqsave(&diag210_lock, flags);
204	diag210_tmp = *addr;
205
206	diag_stat_inc(DIAG_STAT_X210);
207	asm volatile(
208		"	lhi	%0,-1\n"
209		"	sam31\n"
210		"	diag	%1,0,0x210\n"
211		"0:	ipm	%0\n"
212		"	srl	%0,28\n"
213		"1:	sam64\n"
214		EX_TABLE(0b, 1b)
215		: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
216
217	*addr = diag210_tmp;
218	spin_unlock_irqrestore(&diag210_lock, flags);
219
220	return ccode;
221}
222EXPORT_SYMBOL(diag210);
223
224int diag224(void *ptr)
225{
226	int rc = -EOPNOTSUPP;
227
228	diag_stat_inc(DIAG_STAT_X224);
229	asm volatile(
230		"	diag	%1,%2,0x224\n"
231		"0:	lhi	%0,0x0\n"
232		"1:\n"
233		EX_TABLE(0b,1b)
234		: "+d" (rc) :"d" (0), "d" (ptr) : "memory");
235	return rc;
236}
237EXPORT_SYMBOL(diag224);

  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);