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, 203 insertions, 0 deletions

diff --git a/kernel/drivers/rapidio/switches/idtcps.c b/kernel/drivers/rapidio/switches/idtcps.c
new file mode 100644
index 000000000..7fbb60d31
--- /dev/null
+++ b/kernel/drivers/rapidio/switches/idtcps.c
@@ -0,0 +1,203 @@
+/*
+ * IDT CPS RapidIO switches support
+ *
+ * Copyright 2009-2010 Integrated Device Technology, Inc.
+ * Alexandre Bounine <alexandre.bounine@idt.com>
+ *
+ * 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.
+ */
+
+#include <linux/rio.h>
+#include <linux/rio_drv.h>
+#include <linux/rio_ids.h>
+#include <linux/module.h>
+#include "../rio.h"
+
+#define CPS_DEFAULT_ROUTE	0xde
+#define CPS_NO_ROUTE		0xdf
+
+#define IDTCPS_RIO_DOMAIN 0xf20020
+
+static int
+idtcps_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
+		       u16 table, u16 route_destid, u8 route_port)
+{
+	u32 result;
+
+	if (route_port == RIO_INVALID_ROUTE)
+		route_port = CPS_DEFAULT_ROUTE;
+
+	if (table == RIO_GLOBAL_TABLE) {
+		rio_mport_write_config_32(mport, destid, hopcount,
+				RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
+
+		rio_mport_read_config_32(mport, destid, hopcount,
+				RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
+
+		result = (0xffffff00 & result) | (u32)route_port;
+		rio_mport_write_config_32(mport, destid, hopcount,
+				RIO_STD_RTE_CONF_PORT_SEL_CSR, result);
+	}
+
+	return 0;
+}
+
+static int
+idtcps_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
+		       u16 table, u16 route_destid, u8 *route_port)
+{
+	u32 result;
+
+	if (table == RIO_GLOBAL_TABLE) {
+		rio_mport_write_config_32(mport, destid, hopcount,
+				RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
+
+		rio_mport_read_config_32(mport, destid, hopcount,
+				RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
+
+		if (CPS_DEFAULT_ROUTE == (u8)result ||
+		    CPS_NO_ROUTE == (u8)result)
+			*route_port = RIO_INVALID_ROUTE;
+		else
+			*route_port = (u8)result;
+	}
+
+	return 0;
+}
+
+static int
+idtcps_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
+		       u16 table)
+{
+	u32 i;
+
+	if (table == RIO_GLOBAL_TABLE) {
+		for (i = 0x80000000; i <= 0x800000ff;) {
+			rio_mport_write_config_32(mport, destid, hopcount,
+				RIO_STD_RTE_CONF_DESTID_SEL_CSR, i);
+			rio_mport_write_config_32(mport, destid, hopcount,
+				RIO_STD_RTE_CONF_PORT_SEL_CSR,
+				(CPS_DEFAULT_ROUTE << 24) |
+				(CPS_DEFAULT_ROUTE << 16) |
+				(CPS_DEFAULT_ROUTE << 8) | CPS_DEFAULT_ROUTE);
+			i += 4;
+		}
+	}
+
+	return 0;
+}
+
+static int
+idtcps_set_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
+		       u8 sw_domain)
+{
+	/*
+	 * Switch domain configuration operates only at global level
+	 */
+	rio_mport_write_config_32(mport, destid, hopcount,
+				  IDTCPS_RIO_DOMAIN, (u32)sw_domain);
+	return 0;
+}
+
+static int
+idtcps_get_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
+		       u8 *sw_domain)
+{
+	u32 regval;
+
+	/*
+	 * Switch domain configuration operates only at global level
+	 */
+	rio_mport_read_config_32(mport, destid, hopcount,
+				IDTCPS_RIO_DOMAIN, &regval);
+
+	*sw_domain = (u8)(regval & 0xff);
+
+	return 0;
+}
+
+static struct rio_switch_ops idtcps_switch_ops = {
+	.owner = THIS_MODULE,
+	.add_entry = idtcps_route_add_entry,
+	.get_entry = idtcps_route_get_entry,
+	.clr_table = idtcps_route_clr_table,
+	.set_domain = idtcps_set_domain,
+	.get_domain = idtcps_get_domain,
+	.em_init = NULL,
+	.em_handle = NULL,
+};
+
+static int idtcps_probe(struct rio_dev *rdev, const struct rio_device_id *id)
+{
+	pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
+
+	spin_lock(&rdev->rswitch->lock);
+
+	if (rdev->rswitch->ops) {
+		spin_unlock(&rdev->rswitch->lock);
+		return -EINVAL;
+	}
+
+	rdev->rswitch->ops = &idtcps_switch_ops;
+
+	if (rdev->do_enum) {
+		/* set TVAL = ~50us */
+		rio_write_config_32(rdev,
+			rdev->phys_efptr + RIO_PORT_LINKTO_CTL_CSR, 0x8e << 8);
+		/* Ensure that default routing is disabled on startup */
+		rio_write_config_32(rdev,
+				    RIO_STD_RTE_DEFAULT_PORT, CPS_NO_ROUTE);
+	}
+
+	spin_unlock(&rdev->rswitch->lock);
+	return 0;
+}
+
+static void idtcps_remove(struct rio_dev *rdev)
+{
+	pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
+	spin_lock(&rdev->rswitch->lock);
+	if (rdev->rswitch->ops != &idtcps_switch_ops) {
+		spin_unlock(&rdev->rswitch->lock);
+		return;
+	}
+	rdev->rswitch->ops = NULL;
+	spin_unlock(&rdev->rswitch->lock);
+}
+
+static struct rio_device_id idtcps_id_table[] = {
+	{RIO_DEVICE(RIO_DID_IDTCPS6Q, RIO_VID_IDT)},
+	{RIO_DEVICE(RIO_DID_IDTCPS8, RIO_VID_IDT)},
+	{RIO_DEVICE(RIO_DID_IDTCPS10Q, RIO_VID_IDT)},
+	{RIO_DEVICE(RIO_DID_IDTCPS12, RIO_VID_IDT)},
+	{RIO_DEVICE(RIO_DID_IDTCPS16, RIO_VID_IDT)},
+	{RIO_DEVICE(RIO_DID_IDT70K200, RIO_VID_IDT)},
+	{ 0, }	/* terminate list */
+};
+
+static struct rio_driver idtcps_driver = {
+	.name = "idtcps",
+	.id_table = idtcps_id_table,
+	.probe = idtcps_probe,
+	.remove = idtcps_remove,
+};
+
+static int __init idtcps_init(void)
+{
+	return rio_register_driver(&idtcps_driver);
+}
+
+static void __exit idtcps_exit(void)
+{
+	rio_unregister_driver(&idtcps_driver);
+}
+
+device_initcall(idtcps_init);
+module_exit(idtcps_exit);
+
+MODULE_DESCRIPTION("IDT CPS Gen.1 Serial RapidIO switch family driver");
+MODULE_AUTHOR("Integrated Device Technology, Inc.");
+MODULE_LICENSE("GPL");