aboutsummaryrefslogtreecommitdiffstats
path: root/arch/s390
diff options
context:
space:
mode:
authorHeinz Graalfs <graalfs@linux.vnet.ibm.com>2011-02-15 13:02:14 -0500
committerRobert Richter <robert.richter@amd.com>2011-03-16 09:05:35 -0400
commitc814d160f61466ea6d4491bb4e8e548856e27a58 (patch)
tree8cae1f71911a09a61dfdd40a9e346dbc6fcd46ab /arch/s390
parent7bb2e269aefe4539313922ab4a89367cd52a51d1 (diff)
oprofile, s390: Remove hwsampler_files.c and merge it into init.c
Merge the contents of hwsampler_files.c into arch/s390/oprofile/init.c. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/oprofile/Makefile2
-rw-r--r--arch/s390/oprofile/hwsampler_files.c162
-rw-r--r--arch/s390/oprofile/init.c161
3 files changed, 159 insertions, 166 deletions
diff --git a/arch/s390/oprofile/Makefile b/arch/s390/oprofile/Makefile
index 00d8fc8e4429..d698cddcfbdd 100644
--- a/arch/s390/oprofile/Makefile
+++ b/arch/s390/oprofile/Makefile
@@ -6,4 +6,4 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
6 oprofilefs.o oprofile_stats.o \ 6 oprofilefs.o oprofile_stats.o \
7 timer_int.o ) 7 timer_int.o )
8 8
9oprofile-y := $(DRIVER_OBJS) init.o backtrace.o hwsampler.o hwsampler_files.o 9oprofile-y := $(DRIVER_OBJS) init.o backtrace.o hwsampler.o
diff --git a/arch/s390/oprofile/hwsampler_files.c b/arch/s390/oprofile/hwsampler_files.c
deleted file mode 100644
index 2e1da2449ba9..000000000000
--- a/arch/s390/oprofile/hwsampler_files.c
+++ /dev/null
@@ -1,162 +0,0 @@
1/**
2 * arch/s390/oprofile/hwsampler_files.c
3 *
4 * Copyright IBM Corp. 2010
5 * Author: Mahesh Salgaonkar (mahesh@linux.vnet.ibm.com)
6 */
7#include <linux/oprofile.h>
8#include <linux/errno.h>
9#include <linux/fs.h>
10
11#include "../../../drivers/oprofile/oprof.h"
12#include "hwsampler.h"
13
14#define DEFAULT_INTERVAL 4096
15
16#define DEFAULT_SDBT_BLOCKS 1
17#define DEFAULT_SDB_BLOCKS 511
18
19static unsigned long oprofile_hw_interval = DEFAULT_INTERVAL;
20static unsigned long oprofile_min_interval;
21static unsigned long oprofile_max_interval;
22
23static unsigned long oprofile_sdbt_blocks = DEFAULT_SDBT_BLOCKS;
24static unsigned long oprofile_sdb_blocks = DEFAULT_SDB_BLOCKS;
25
26static int hwsampler_file;
27static int hwsampler_running; /* start_mutex must be held to change */
28
29static struct oprofile_operations timer_ops;
30
31static int oprofile_hwsampler_start(void)
32{
33 int retval;
34
35 hwsampler_running = hwsampler_file;
36
37 if (!hwsampler_running)
38 return timer_ops.start();
39
40 retval = hwsampler_allocate(oprofile_sdbt_blocks, oprofile_sdb_blocks);
41 if (retval)
42 return retval;
43
44 retval = hwsampler_start_all(oprofile_hw_interval);
45 if (retval)
46 hwsampler_deallocate();
47
48 return retval;
49}
50
51static void oprofile_hwsampler_stop(void)
52{
53 if (!hwsampler_running) {
54 timer_ops.stop();
55 return;
56 }
57
58 hwsampler_stop_all();
59 hwsampler_deallocate();
60 return;
61}
62
63static ssize_t hwsampler_read(struct file *file, char __user *buf,
64 size_t count, loff_t *offset)
65{
66 return oprofilefs_ulong_to_user(hwsampler_file, buf, count, offset);
67}
68
69static ssize_t hwsampler_write(struct file *file, char const __user *buf,
70 size_t count, loff_t *offset)
71{
72 unsigned long val;
73 int retval;
74
75 if (*offset)
76 return -EINVAL;
77
78 retval = oprofilefs_ulong_from_user(&val, buf, count);
79 if (retval)
80 return retval;
81
82 if (oprofile_started)
83 /*
84 * save to do without locking as we set
85 * hwsampler_running in start() when start_mutex is
86 * held
87 */
88 return -EBUSY;
89
90 hwsampler_file = val;
91
92 return count;
93}
94
95static const struct file_operations hwsampler_fops = {
96 .read = hwsampler_read,
97 .write = hwsampler_write,
98};
99
100static int oprofile_create_hwsampling_files(struct super_block *sb,
101 struct dentry *root)
102{
103 struct dentry *hw_dir;
104
105 /* reinitialize default values */
106 hwsampler_file = 1;
107
108 hw_dir = oprofilefs_mkdir(sb, root, "hwsampling");
109 if (!hw_dir)
110 return -EINVAL;
111
112 oprofilefs_create_file(sb, hw_dir, "hwsampler", &hwsampler_fops);
113 oprofilefs_create_ulong(sb, hw_dir, "hw_interval",
114 &oprofile_hw_interval);
115 oprofilefs_create_ro_ulong(sb, hw_dir, "hw_min_interval",
116 &oprofile_min_interval);
117 oprofilefs_create_ro_ulong(sb, hw_dir, "hw_max_interval",
118 &oprofile_max_interval);
119 oprofilefs_create_ulong(sb, hw_dir, "hw_sdbt_blocks",
120 &oprofile_sdbt_blocks);
121
122 return 0;
123}
124
125int oprofile_hwsampler_init(struct oprofile_operations* ops)
126{
127 if (hwsampler_setup())
128 return -ENODEV;
129
130 /*
131 * create hwsampler files only if hwsampler_setup() succeeds.
132 */
133 oprofile_min_interval = hwsampler_query_min_interval();
134 if (oprofile_min_interval < 0) {
135 oprofile_min_interval = 0;
136 return -ENODEV;
137 }
138 oprofile_max_interval = hwsampler_query_max_interval();
139 if (oprofile_max_interval < 0) {
140 oprofile_max_interval = 0;
141 return -ENODEV;
142 }
143
144 if (oprofile_timer_init(ops))
145 return -ENODEV;
146
147 printk(KERN_INFO "oprofile: using hardware sampling\n");
148
149 memcpy(&timer_ops, ops, sizeof(timer_ops));
150
151 ops->start = oprofile_hwsampler_start;
152 ops->stop = oprofile_hwsampler_stop;
153 ops->create_files = oprofile_create_hwsampling_files;
154
155 return 0;
156}
157
158void oprofile_hwsampler_exit(void)
159{
160 oprofile_timer_exit();
161 hwsampler_shutdown();
162}
diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c
index 059b44b9f171..0e38a5b8793f 100644
--- a/arch/s390/oprofile/init.c
+++ b/arch/s390/oprofile/init.c
@@ -4,19 +4,174 @@
4 * S390 Version 4 * S390 Version
5 * Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation 5 * Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Thomas Spatzier (tspat@de.ibm.com) 6 * Author(s): Thomas Spatzier (tspat@de.ibm.com)
7 * Author(s): Mahesh Salgaonkar (mahesh@linux.vnet.ibm.com)
8 * Author(s): Heinz Graalfs (graalfs@linux.vnet.ibm.com)
7 * 9 *
8 * @remark Copyright 2002 OProfile authors 10 * @remark Copyright 2002-2011 OProfile authors
9 */ 11 */
10 12
11#include <linux/oprofile.h> 13#include <linux/oprofile.h>
12#include <linux/init.h> 14#include <linux/init.h>
13#include <linux/errno.h> 15#include <linux/errno.h>
16#include <linux/oprofile.h>
17#include <linux/errno.h>
18#include <linux/fs.h>
19
20#include "../../../drivers/oprofile/oprof.h"
21#include "hwsampler.h"
22
23#define DEFAULT_INTERVAL 4096
24
25#define DEFAULT_SDBT_BLOCKS 1
26#define DEFAULT_SDB_BLOCKS 511
27
28static unsigned long oprofile_hw_interval = DEFAULT_INTERVAL;
29static unsigned long oprofile_min_interval;
30static unsigned long oprofile_max_interval;
31
32static unsigned long oprofile_sdbt_blocks = DEFAULT_SDBT_BLOCKS;
33static unsigned long oprofile_sdb_blocks = DEFAULT_SDB_BLOCKS;
14 34
15extern int oprofile_hwsampler_init(struct oprofile_operations* ops); 35static int hwsampler_file;
16extern void oprofile_hwsampler_exit(void); 36static int hwsampler_running; /* start_mutex must be held to change */
37
38static struct oprofile_operations timer_ops;
17 39
18extern void s390_backtrace(struct pt_regs * const regs, unsigned int depth); 40extern void s390_backtrace(struct pt_regs * const regs, unsigned int depth);
19 41
42static int oprofile_hwsampler_start(void)
43{
44 int retval;
45
46 hwsampler_running = hwsampler_file;
47
48 if (!hwsampler_running)
49 return timer_ops.start();
50
51 retval = hwsampler_allocate(oprofile_sdbt_blocks, oprofile_sdb_blocks);
52 if (retval)
53 return retval;
54
55 retval = hwsampler_start_all(oprofile_hw_interval);
56 if (retval)
57 hwsampler_deallocate();
58
59 return retval;
60}
61
62static void oprofile_hwsampler_stop(void)
63{
64 if (!hwsampler_running) {
65 timer_ops.stop();
66 return;
67 }
68
69 hwsampler_stop_all();
70 hwsampler_deallocate();
71 return;
72}
73
74static ssize_t hwsampler_read(struct file *file, char __user *buf,
75 size_t count, loff_t *offset)
76{
77 return oprofilefs_ulong_to_user(hwsampler_file, buf, count, offset);
78}
79
80static ssize_t hwsampler_write(struct file *file, char const __user *buf,
81 size_t count, loff_t *offset)
82{
83 unsigned long val;
84 int retval;
85
86 if (*offset)
87 return -EINVAL;
88
89 retval = oprofilefs_ulong_from_user(&val, buf, count);
90 if (retval)
91 return retval;
92
93 if (oprofile_started)
94 /*
95 * save to do without locking as we set
96 * hwsampler_running in start() when start_mutex is
97 * held
98 */
99 return -EBUSY;
100
101 hwsampler_file = val;
102
103 return count;
104}
105
106static const struct file_operations hwsampler_fops = {
107 .read = hwsampler_read,
108 .write = hwsampler_write,
109};
110
111static int oprofile_create_hwsampling_files(struct super_block *sb,
112 struct dentry *root)
113{
114 struct dentry *hw_dir;
115
116 /* reinitialize default values */
117 hwsampler_file = 1;
118
119 hw_dir = oprofilefs_mkdir(sb, root, "hwsampling");
120 if (!hw_dir)
121 return -EINVAL;
122
123 oprofilefs_create_file(sb, hw_dir, "hwsampler", &hwsampler_fops);
124 oprofilefs_create_ulong(sb, hw_dir, "hw_interval",
125 &oprofile_hw_interval);
126 oprofilefs_create_ro_ulong(sb, hw_dir, "hw_min_interval",
127 &oprofile_min_interval);
128 oprofilefs_create_ro_ulong(sb, hw_dir, "hw_max_interval",
129 &oprofile_max_interval);
130 oprofilefs_create_ulong(sb, hw_dir, "hw_sdbt_blocks",
131 &oprofile_sdbt_blocks);
132
133 return 0;
134}
135
136int oprofile_hwsampler_init(struct oprofile_operations* ops)
137{
138 if (hwsampler_setup())
139 return -ENODEV;
140
141 /*
142 * create hwsampler files only if hwsampler_setup() succeeds.
143 */
144 oprofile_min_interval = hwsampler_query_min_interval();
145 if (oprofile_min_interval < 0) {
146 oprofile_min_interval = 0;
147 return -ENODEV;
148 }
149 oprofile_max_interval = hwsampler_query_max_interval();
150 if (oprofile_max_interval < 0) {
151 oprofile_max_interval = 0;
152 return -ENODEV;
153 }
154
155 if (oprofile_timer_init(ops))
156 return -ENODEV;
157
158 printk(KERN_INFO "oprofile: using hardware sampling\n");
159
160 memcpy(&timer_ops, ops, sizeof(timer_ops));
161
162 ops->start = oprofile_hwsampler_start;
163 ops->stop = oprofile_hwsampler_stop;
164 ops->create_files = oprofile_create_hwsampling_files;
165
166 return 0;
167}
168
169void oprofile_hwsampler_exit(void)
170{
171 oprofile_timer_exit();
172 hwsampler_shutdown();
173}
174
20int __init oprofile_arch_init(struct oprofile_operations* ops) 175int __init oprofile_arch_init(struct oprofile_operations* ops)
21{ 176{
22 ops->backtrace = s390_backtrace; 177 ops->backtrace = s390_backtrace;
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 14:56:11 -0500