Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 148 insertions, 0 deletions

diff --git a/kernel/sound/core/seq/seq_timer.h b/kernel/sound/core/seq/seq_timer.h
new file mode 100644
index 000000000..88dfb7180
--- /dev/null
+++ b/kernel/sound/core/seq/seq_timer.h
@@ -0,0 +1,148 @@
+/*
+ *  ALSA sequencer Timer
+ *  Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+#ifndef __SND_SEQ_TIMER_H
+#define __SND_SEQ_TIMER_H
+
+#include <sound/timer.h>
+#include <sound/seq_kernel.h>
+
+struct snd_seq_timer_tick {
+	snd_seq_tick_time_t	cur_tick;	/* current tick */
+	unsigned long		resolution;	/* time per tick in nsec */
+	unsigned long		fraction;	/* current time per tick in nsec */
+};
+
+struct snd_seq_timer {
+	/* ... tempo / offset / running state */
+
+	unsigned int		running:1,	/* running state of queue */	
+				initialized:1;	/* timer is initialized */
+
+	unsigned int		tempo;		/* current tempo, us/tick */
+	int			ppq;		/* time resolution, ticks/quarter */
+
+	snd_seq_real_time_t	cur_time;	/* current time */
+	struct snd_seq_timer_tick	tick;	/* current tick */
+	int tick_updated;
+	
+	int			type;		/* timer type */
+	struct snd_timer_id	alsa_id;	/* ALSA's timer ID */
+	struct snd_timer_instance	*timeri;	/* timer instance */
+	unsigned int		ticks;
+	unsigned long		preferred_resolution; /* timer resolution, ticks/sec */
+
+	unsigned int skew;
+	unsigned int skew_base;
+
+	struct timeval 		last_update;	 /* time of last clock update, used for interpolation */
+
+	spinlock_t lock;
+};
+
+
+/* create new timer (constructor) */
+struct snd_seq_timer *snd_seq_timer_new(void);
+
+/* delete timer (destructor) */
+void snd_seq_timer_delete(struct snd_seq_timer **tmr);
+
+/* */
+static inline void snd_seq_timer_update_tick(struct snd_seq_timer_tick *tick,
+					     unsigned long resolution)
+{
+	if (tick->resolution > 0) {
+		tick->fraction += resolution;
+		tick->cur_tick += (unsigned int)(tick->fraction / tick->resolution);
+		tick->fraction %= tick->resolution;
+	}
+}
+
+
+/* compare timestamp between events */
+/* return 1 if a >= b; otherwise return 0 */
+static inline int snd_seq_compare_tick_time(snd_seq_tick_time_t *a, snd_seq_tick_time_t *b)
+{
+	/* compare ticks */
+	return (*a >= *b);
+}
+
+static inline int snd_seq_compare_real_time(snd_seq_real_time_t *a, snd_seq_real_time_t *b)
+{
+	/* compare real time */
+	if (a->tv_sec > b->tv_sec)
+		return 1;
+	if ((a->tv_sec == b->tv_sec) && (a->tv_nsec >= b->tv_nsec))
+		return 1;
+	return 0;
+}
+
+
+static inline void snd_seq_sanity_real_time(snd_seq_real_time_t *tm)
+{
+	while (tm->tv_nsec >= 1000000000) {
+		/* roll-over */
+		tm->tv_nsec -= 1000000000;
+                tm->tv_sec++;
+        }
+}
+
+
+/* increment timestamp */
+static inline void snd_seq_inc_real_time(snd_seq_real_time_t *tm, snd_seq_real_time_t *inc)
+{
+	tm->tv_sec  += inc->tv_sec;
+	tm->tv_nsec += inc->tv_nsec;
+	snd_seq_sanity_real_time(tm);
+}
+
+static inline void snd_seq_inc_time_nsec(snd_seq_real_time_t *tm, unsigned long nsec)
+{
+	tm->tv_nsec  += nsec;
+	snd_seq_sanity_real_time(tm);
+}
+
+/* called by timer isr */
+struct snd_seq_queue;
+int snd_seq_timer_open(struct snd_seq_queue *q);
+int snd_seq_timer_close(struct snd_seq_queue *q);
+int snd_seq_timer_midi_open(struct snd_seq_queue *q);
+int snd_seq_timer_midi_close(struct snd_seq_queue *q);
+void snd_seq_timer_defaults(struct snd_seq_timer *tmr);
+void snd_seq_timer_reset(struct snd_seq_timer *tmr);
+int snd_seq_timer_stop(struct snd_seq_timer *tmr);
+int snd_seq_timer_start(struct snd_seq_timer *tmr);
+int snd_seq_timer_continue(struct snd_seq_timer *tmr);
+int snd_seq_timer_set_tempo(struct snd_seq_timer *tmr, int tempo);
+int snd_seq_timer_set_ppq(struct snd_seq_timer *tmr, int ppq);
+int snd_seq_timer_set_position_tick(struct snd_seq_timer *tmr, snd_seq_tick_time_t position);
+int snd_seq_timer_set_position_time(struct snd_seq_timer *tmr, snd_seq_real_time_t position);
+int snd_seq_timer_set_skew(struct snd_seq_timer *tmr, unsigned int skew, unsigned int base);
+snd_seq_real_time_t snd_seq_timer_get_cur_time(struct snd_seq_timer *tmr);
+snd_seq_tick_time_t snd_seq_timer_get_cur_tick(struct snd_seq_timer *tmr);
+
+extern int seq_default_timer_class;
+extern int seq_default_timer_sclass;
+extern int seq_default_timer_card;
+extern int seq_default_timer_device;
+extern int seq_default_timer_subdevice;
+extern int seq_default_timer_resolution;
+
+#endif