diff options
Diffstat (limited to 'drivers/staging/dream/qdsp5/evlog.h')
-rw-r--r-- | drivers/staging/dream/qdsp5/evlog.h | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/drivers/staging/dream/qdsp5/evlog.h b/drivers/staging/dream/qdsp5/evlog.h deleted file mode 100644 index e5ab86b9dd7c..000000000000 --- a/drivers/staging/dream/qdsp5/evlog.h +++ /dev/null @@ -1,134 +0,0 @@ -/* arch/arm/mach-msm/qdsp5/evlog.h - * - * simple event log debugging facility - * - * Copyright (C) 2008 Google, Inc. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#include <linux/fs.h> -#include <linux/hrtimer.h> -#include <linux/debugfs.h> - -#define EV_LOG_ENTRY_NAME(n) n##_entry - -#define DECLARE_LOG(_name, _size, _str) \ -static struct ev_entry EV_LOG_ENTRY_NAME(_name)[_size]; \ -static struct ev_log _name = { \ - .name = #_name, \ - .strings = _str, \ - .num_strings = ARRAY_SIZE(_str), \ - .entry = EV_LOG_ENTRY_NAME(_name), \ - .max = ARRAY_SIZE(EV_LOG_ENTRY_NAME(_name)), \ -} - -struct ev_entry { - ktime_t when; - uint32_t id; - uint32_t arg; -}; - -struct ev_log { - struct ev_entry *entry; - unsigned max; - unsigned next; - unsigned fault; - const char **strings; - unsigned num_strings; - const char *name; -}; - -static char ev_buf[4096]; - -static ssize_t ev_log_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct ev_log *log = file->private_data; - struct ev_entry *entry; - unsigned long flags; - int size = 0; - unsigned n, id, max; - ktime_t now, t; - - max = log->max; - now = ktime_get(); - local_irq_save(flags); - n = (log->next - 1) & (max - 1); - entry = log->entry; - while (n != log->next) { - t = ktime_sub(now, entry[n].when); - id = entry[n].id; - if (id) { - const char *str; - if (id < log->num_strings) - str = log->strings[id]; - else - str = "UNKNOWN"; - size += scnprintf(ev_buf + size, 4096 - size, - "%8d.%03d %08x %s\n", - t.tv.sec, t.tv.nsec / 1000000, - entry[n].arg, str); - } - n = (n - 1) & (max - 1); - } - log->fault = 0; - local_irq_restore(flags); - return simple_read_from_buffer(buf, count, ppos, ev_buf, size); -} - -static void ev_log_write(struct ev_log *log, unsigned id, unsigned arg) -{ - struct ev_entry *entry; - unsigned long flags; - local_irq_save(flags); - - if (log->fault) { - if (log->fault == 1) - goto done; - log->fault--; - } - - entry = log->entry + log->next; - entry->when = ktime_get(); - entry->id = id; - entry->arg = arg; - log->next = (log->next + 1) & (log->max - 1); -done: - local_irq_restore(flags); -} - -static void ev_log_freeze(struct ev_log *log, unsigned count) -{ - unsigned long flags; - local_irq_save(flags); - log->fault = count; - local_irq_restore(flags); -} - -static int ev_log_open(struct inode *inode, struct file *file) -{ - file->private_data = inode->i_private; - return 0; -} - -static const struct file_operations ev_log_ops = { - .read = ev_log_read, - .open = ev_log_open, - .llseek = default_llseek, -}; - -static int ev_log_init(struct ev_log *log) -{ - debugfs_create_file(log->name, 0444, 0, log, &ev_log_ops); - return 0; -} - |