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>
diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c
index 059b44b..0e38a5b 100644
--- a/arch/s390/oprofile/init.c
+++ b/arch/s390/oprofile/init.c
@@ -4,19 +4,174 @@
* S390 Version
* Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Thomas Spatzier (tspat@de.ibm.com)
+ * Author(s): Mahesh Salgaonkar (mahesh@linux.vnet.ibm.com)
+ * Author(s): Heinz Graalfs (graalfs@linux.vnet.ibm.com)
*
- * @remark Copyright 2002 OProfile authors
+ * @remark Copyright 2002-2011 OProfile authors
*/
#include <linux/oprofile.h>
#include <linux/init.h>
#include <linux/errno.h>
+#include <linux/oprofile.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
-extern int oprofile_hwsampler_init(struct oprofile_operations* ops);
-extern void oprofile_hwsampler_exit(void);
+#include "../../../drivers/oprofile/oprof.h"
+#include "hwsampler.h"
+
+#define DEFAULT_INTERVAL 4096
+
+#define DEFAULT_SDBT_BLOCKS 1
+#define DEFAULT_SDB_BLOCKS 511
+
+static unsigned long oprofile_hw_interval = DEFAULT_INTERVAL;
+static unsigned long oprofile_min_interval;
+static unsigned long oprofile_max_interval;
+
+static unsigned long oprofile_sdbt_blocks = DEFAULT_SDBT_BLOCKS;
+static unsigned long oprofile_sdb_blocks = DEFAULT_SDB_BLOCKS;
+
+static int hwsampler_file;
+static int hwsampler_running; /* start_mutex must be held to change */
+
+static struct oprofile_operations timer_ops;
extern void s390_backtrace(struct pt_regs * const regs, unsigned int depth);
+static int oprofile_hwsampler_start(void)
+{
+ int retval;
+
+ hwsampler_running = hwsampler_file;
+
+ if (!hwsampler_running)
+ return timer_ops.start();
+
+ retval = hwsampler_allocate(oprofile_sdbt_blocks, oprofile_sdb_blocks);
+ if (retval)
+ return retval;
+
+ retval = hwsampler_start_all(oprofile_hw_interval);
+ if (retval)
+ hwsampler_deallocate();
+
+ return retval;
+}
+
+static void oprofile_hwsampler_stop(void)
+{
+ if (!hwsampler_running) {
+ timer_ops.stop();
+ return;
+ }
+
+ hwsampler_stop_all();
+ hwsampler_deallocate();
+ return;
+}
+
+static ssize_t hwsampler_read(struct file *file, char __user *buf,
+ size_t count, loff_t *offset)
+{
+ return oprofilefs_ulong_to_user(hwsampler_file, buf, count, offset);
+}
+
+static ssize_t hwsampler_write(struct file *file, char const __user *buf,
+ size_t count, loff_t *offset)
+{
+ unsigned long val;
+ int retval;
+
+ if (*offset)
+ return -EINVAL;
+
+ retval = oprofilefs_ulong_from_user(&val, buf, count);
+ if (retval)
+ return retval;
+
+ if (oprofile_started)
+ /*
+ * save to do without locking as we set
+ * hwsampler_running in start() when start_mutex is
+ * held
+ */
+ return -EBUSY;
+
+ hwsampler_file = val;
+
+ return count;
+}
+
+static const struct file_operations hwsampler_fops = {
+ .read = hwsampler_read,
+ .write = hwsampler_write,
+};
+
+static int oprofile_create_hwsampling_files(struct super_block *sb,
+ struct dentry *root)
+{
+ struct dentry *hw_dir;
+
+ /* reinitialize default values */
+ hwsampler_file = 1;
+
+ hw_dir = oprofilefs_mkdir(sb, root, "hwsampling");
+ if (!hw_dir)
+ return -EINVAL;
+
+ oprofilefs_create_file(sb, hw_dir, "hwsampler", &hwsampler_fops);
+ oprofilefs_create_ulong(sb, hw_dir, "hw_interval",
+ &oprofile_hw_interval);
+ oprofilefs_create_ro_ulong(sb, hw_dir, "hw_min_interval",
+ &oprofile_min_interval);
+ oprofilefs_create_ro_ulong(sb, hw_dir, "hw_max_interval",
+ &oprofile_max_interval);
+ oprofilefs_create_ulong(sb, hw_dir, "hw_sdbt_blocks",
+ &oprofile_sdbt_blocks);
+
+ return 0;
+}
+
+int oprofile_hwsampler_init(struct oprofile_operations* ops)
+{
+ if (hwsampler_setup())
+ return -ENODEV;
+
+ /*
+ * create hwsampler files only if hwsampler_setup() succeeds.
+ */
+ oprofile_min_interval = hwsampler_query_min_interval();
+ if (oprofile_min_interval < 0) {
+ oprofile_min_interval = 0;
+ return -ENODEV;
+ }
+ oprofile_max_interval = hwsampler_query_max_interval();
+ if (oprofile_max_interval < 0) {
+ oprofile_max_interval = 0;
+ return -ENODEV;
+ }
+
+ if (oprofile_timer_init(ops))
+ return -ENODEV;
+
+ printk(KERN_INFO "oprofile: using hardware sampling\n");
+
+ memcpy(&timer_ops, ops, sizeof(timer_ops));
+
+ ops->start = oprofile_hwsampler_start;
+ ops->stop = oprofile_hwsampler_stop;
+ ops->create_files = oprofile_create_hwsampling_files;
+
+ return 0;
+}
+
+void oprofile_hwsampler_exit(void)
+{
+ oprofile_timer_exit();
+ hwsampler_shutdown();
+}
+
int __init oprofile_arch_init(struct oprofile_operations* ops)
{
ops->backtrace = s390_backtrace;