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, 230 insertions, 0 deletions

diff --git a/kernel/drivers/isdn/sc/message.c b/kernel/drivers/isdn/sc/message.c
new file mode 100644
index 000000000..9679a1902
--- /dev/null
+++ b/kernel/drivers/isdn/sc/message.c
@@ -0,0 +1,230 @@
+/* $Id: message.c,v 1.5.8.2 2001/09/23 22:24:59 kai Exp $
+ *
+ * functions for sending and receiving control messages
+ *
+ * Copyright (C) 1996  SpellCaster Telecommunications Inc.
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * For more information, please contact gpl-info@spellcast.com or write:
+ *
+ *     SpellCaster Telecommunications Inc.
+ *     5621 Finch Avenue East, Unit #3
+ *     Scarborough, Ontario  Canada
+ *     M1B 2T9
+ *     +1 (416) 297-8565
+ *     +1 (416) 297-6433 Facsimile
+ */
+#include <linux/sched.h>
+#include "includes.h"
+#include "hardware.h"
+#include "message.h"
+#include "card.h"
+
+/*
+ * receive a message from the board
+ */
+int receivemessage(int card, RspMessage *rspmsg)
+{
+	DualPortMemory *dpm;
+	unsigned long flags;
+
+	if (!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return -EINVAL;
+	}
+
+	pr_debug("%s: Entered receivemessage\n",
+		 sc_adapter[card]->devicename);
+
+	/*
+	 * See if there are messages waiting
+	 */
+	if (inb(sc_adapter[card]->ioport[FIFO_STATUS]) & RF_HAS_DATA) {
+		/*
+		 * Map in the DPM to the base page and copy the message
+		 */
+		spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+		outb((sc_adapter[card]->shmem_magic >> 14) | 0x80,
+		     sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
+		dpm = (DualPortMemory *) sc_adapter[card]->rambase;
+		memcpy_fromio(rspmsg, &(dpm->rsp_queue[dpm->rsp_tail]),
+			      MSG_LEN);
+		dpm->rsp_tail = (dpm->rsp_tail + 1) % MAX_MESSAGES;
+		inb(sc_adapter[card]->ioport[FIFO_READ]);
+		spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+		/*
+		 * Tell the board that the message is received
+		 */
+		pr_debug("%s: Received Message seq:%d pid:%d time:%d cmd:%d "
+			 "cnt:%d (type,class,code):(%d,%d,%d) "
+			 "link:%d stat:0x%x\n",
+			 sc_adapter[card]->devicename,
+			 rspmsg->sequence_no,
+			 rspmsg->process_id,
+			 rspmsg->time_stamp,
+			 rspmsg->cmd_sequence_no,
+			 rspmsg->msg_byte_cnt,
+			 rspmsg->type,
+			 rspmsg->class,
+			 rspmsg->code,
+			 rspmsg->phy_link_no,
+			 rspmsg->rsp_status);
+
+		return 0;
+	}
+	return -ENOMSG;
+}
+
+/*
+ * send a message to the board
+ */
+int sendmessage(int card,
+		unsigned int procid,
+		unsigned int type,
+		unsigned int class,
+		unsigned int code,
+		unsigned int link,
+		unsigned int data_len,
+		unsigned int *data)
+{
+	DualPortMemory *dpm;
+	ReqMessage sndmsg;
+	unsigned long flags;
+
+	if (!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return -EINVAL;
+	}
+
+	/*
+	 * Make sure we only send CEPID messages when the engine is up
+	 * and CMPID messages when it is down
+	 */
+	if (sc_adapter[card]->EngineUp && procid == CMPID) {
+		pr_debug("%s: Attempt to send CM message with engine up\n",
+			 sc_adapter[card]->devicename);
+		return -ESRCH;
+	}
+
+	if (!sc_adapter[card]->EngineUp && procid == CEPID) {
+		pr_debug("%s: Attempt to send CE message with engine down\n",
+			 sc_adapter[card]->devicename);
+		return -ESRCH;
+	}
+
+	memset(&sndmsg, 0, MSG_LEN);
+	sndmsg.msg_byte_cnt = 4;
+	sndmsg.type = type;
+	sndmsg.class = class;
+	sndmsg.code = code;
+	sndmsg.phy_link_no = link;
+
+	if (data_len > 0) {
+		if (data_len > MSG_DATA_LEN)
+			data_len = MSG_DATA_LEN;
+		memcpy(&(sndmsg.msg_data), data, data_len);
+		sndmsg.msg_byte_cnt = data_len + 8;
+	}
+
+	sndmsg.process_id = procid;
+	sndmsg.sequence_no = sc_adapter[card]->seq_no++ % 256;
+
+	/*
+	 * wait for an empty slot in the queue
+	 */
+	while (!(inb(sc_adapter[card]->ioport[FIFO_STATUS]) & WF_NOT_FULL))
+		udelay(1);
+
+	/*
+	 * Disable interrupts and map in shared memory
+	 */
+	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+	outb((sc_adapter[card]->shmem_magic >> 14) | 0x80,
+	     sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
+	dpm = (DualPortMemory *) sc_adapter[card]->rambase;	/* Fix me */
+	memcpy_toio(&(dpm->req_queue[dpm->req_head]), &sndmsg, MSG_LEN);
+	dpm->req_head = (dpm->req_head + 1) % MAX_MESSAGES;
+	outb(sndmsg.sequence_no, sc_adapter[card]->ioport[FIFO_WRITE]);
+	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+
+	pr_debug("%s: Sent Message seq:%d pid:%d time:%d "
+		 "cnt:%d (type,class,code):(%d,%d,%d) "
+		 "link:%d\n ",
+		 sc_adapter[card]->devicename,
+		 sndmsg.sequence_no,
+		 sndmsg.process_id,
+		 sndmsg.time_stamp,
+		 sndmsg.msg_byte_cnt,
+		 sndmsg.type,
+		 sndmsg.class,
+		 sndmsg.code,
+		 sndmsg.phy_link_no);
+
+	return 0;
+}
+
+int send_and_receive(int card,
+		     unsigned int procid,
+		     unsigned char type,
+		     unsigned char class,
+		     unsigned char code,
+		     unsigned char link,
+		     unsigned char data_len,
+		     unsigned char *data,
+		     RspMessage *mesgdata,
+		     int timeout)
+{
+	int retval;
+	int tries;
+
+	if (!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return -EINVAL;
+	}
+
+	sc_adapter[card]->want_async_messages = 1;
+	retval = sendmessage(card, procid, type, class, code, link,
+			     data_len, (unsigned int *) data);
+
+	if (retval) {
+		pr_debug("%s: SendMessage failed in SAR\n",
+			 sc_adapter[card]->devicename);
+		sc_adapter[card]->want_async_messages = 0;
+		return -EIO;
+	}
+
+	tries = 0;
+	/* wait for the response */
+	while (tries < timeout) {
+		schedule_timeout_interruptible(1);
+
+		pr_debug("SAR waiting..\n");
+
+		/*
+		 * See if we got our message back
+		 */
+		if ((sc_adapter[card]->async_msg.type == type) &&
+		    (sc_adapter[card]->async_msg.class == class) &&
+		    (sc_adapter[card]->async_msg.code == code) &&
+		    (sc_adapter[card]->async_msg.phy_link_no == link)) {
+
+			/*
+			 * Got it!
+			 */
+			pr_debug("%s: Got ASYNC message\n",
+				 sc_adapter[card]->devicename);
+			memcpy(mesgdata, &(sc_adapter[card]->async_msg),
+			       sizeof(RspMessage));
+			sc_adapter[card]->want_async_messages = 0;
+			return 0;
+		}
+
+		tries++;
+	}
+
+	pr_debug("%s: SAR message timeout\n", sc_adapter[card]->devicename);
+	sc_adapter[card]->want_async_messages = 0;
+	return -ETIME;
+}