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, 167 insertions, 0 deletions

diff --git a/kernel/arch/sh/drivers/dma/dma-sysfs.c b/kernel/arch/sh/drivers/dma/dma-sysfs.c
new file mode 100644
index 000000000..4b15feda5
--- /dev/null
+++ b/kernel/arch/sh/drivers/dma/dma-sysfs.c
@@ -0,0 +1,167 @@
+/*
+ * arch/sh/drivers/dma/dma-sysfs.c
+ *
+ * sysfs interface for SH DMA API
+ *
+ * Copyright (C) 2004 - 2006  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <asm/dma.h>
+
+static struct bus_type dma_subsys = {
+	.name = "dma",
+	.dev_name = "dma",
+};
+
+static ssize_t dma_show_devices(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	ssize_t len = 0;
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		struct dma_info *info = get_dma_info(i);
+		struct dma_channel *channel = get_dma_channel(i);
+
+		if (unlikely(!info) || !channel)
+			continue;
+
+		len += sprintf(buf + len, "%2d: %14s    %s\n",
+			       channel->chan, info->name,
+			       channel->dev_id);
+	}
+
+	return len;
+}
+
+static DEVICE_ATTR(devices, S_IRUGO, dma_show_devices, NULL);
+
+static int __init dma_subsys_init(void)
+{
+	int ret;
+
+	ret = subsys_system_register(&dma_subsys, NULL);
+	if (unlikely(ret))
+		return ret;
+
+	return device_create_file(dma_subsys.dev_root, &dev_attr_devices);
+}
+postcore_initcall(dma_subsys_init);
+
+static ssize_t dma_show_dev_id(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct dma_channel *channel = to_dma_channel(dev);
+	return sprintf(buf, "%s\n", channel->dev_id);
+}
+
+static ssize_t dma_store_dev_id(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	struct dma_channel *channel = to_dma_channel(dev);
+	strcpy(channel->dev_id, buf);
+	return count;
+}
+
+static DEVICE_ATTR(dev_id, S_IRUGO | S_IWUSR, dma_show_dev_id, dma_store_dev_id);
+
+static ssize_t dma_store_config(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	struct dma_channel *channel = to_dma_channel(dev);
+	unsigned long config;
+
+	config = simple_strtoul(buf, NULL, 0);
+	dma_configure_channel(channel->vchan, config);
+
+	return count;
+}
+
+static DEVICE_ATTR(config, S_IWUSR, NULL, dma_store_config);
+
+static ssize_t dma_show_mode(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct dma_channel *channel = to_dma_channel(dev);
+	return sprintf(buf, "0x%08x\n", channel->mode);
+}
+
+static ssize_t dma_store_mode(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct dma_channel *channel = to_dma_channel(dev);
+	channel->mode = simple_strtoul(buf, NULL, 0);
+	return count;
+}
+
+static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, dma_show_mode, dma_store_mode);
+
+#define dma_ro_attr(field, fmt)						\
+static ssize_t dma_show_##field(struct device *dev,		\
+				struct device_attribute *attr, char *buf)\
+{									\
+	struct dma_channel *channel = to_dma_channel(dev);		\
+	return sprintf(buf, fmt, channel->field);			\
+}									\
+static DEVICE_ATTR(field, S_IRUGO, dma_show_##field, NULL);
+
+dma_ro_attr(count, "0x%08x\n");
+dma_ro_attr(flags, "0x%08lx\n");
+
+int dma_create_sysfs_files(struct dma_channel *chan, struct dma_info *info)
+{
+	struct device *dev = &chan->dev;
+	char name[16];
+	int ret;
+
+	dev->id  = chan->vchan;
+	dev->bus = &dma_subsys;
+
+	ret = device_register(dev);
+	if (ret)
+		return ret;
+
+	ret |= device_create_file(dev, &dev_attr_dev_id);
+	ret |= device_create_file(dev, &dev_attr_count);
+	ret |= device_create_file(dev, &dev_attr_mode);
+	ret |= device_create_file(dev, &dev_attr_flags);
+	ret |= device_create_file(dev, &dev_attr_config);
+
+	if (unlikely(ret)) {
+		dev_err(&info->pdev->dev, "Failed creating attrs\n");
+		return ret;
+	}
+
+	snprintf(name, sizeof(name), "dma%d", chan->chan);
+	return sysfs_create_link(&info->pdev->dev.kobj, &dev->kobj, name);
+}
+
+void dma_remove_sysfs_files(struct dma_channel *chan, struct dma_info *info)
+{
+	struct device *dev = &chan->dev;
+	char name[16];
+
+	device_remove_file(dev, &dev_attr_dev_id);
+	device_remove_file(dev, &dev_attr_count);
+	device_remove_file(dev, &dev_attr_mode);
+	device_remove_file(dev, &dev_attr_flags);
+	device_remove_file(dev, &dev_attr_config);
+
+	snprintf(name, sizeof(name), "dma%d", chan->chan);
+	sysfs_remove_link(&info->pdev->dev.kobj, name);
+
+	device_unregister(dev);
+}