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, 60 insertions, 0 deletions

diff --git a/kernel/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h b/kernel/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
new file mode 100644
index 000000000..5f8693d5a
--- /dev/null
+++ b/kernel/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
@@ -0,0 +1,60 @@
+/*
+ *   This program is free software; you can redistribute it and/or modify it
+ *   under the terms of the GNU General Public License version 2 as published
+ *   by the Free Software Foundation.
+ *
+ *   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.
+ *
+ *   Copyright (C) 2011 John Crispin <blogic@openwrt.org>
+ */
+
+#ifndef LTQ_DMA_H__
+#define LTQ_DMA_H__
+
+#define LTQ_DESC_SIZE		0x08	/* each descriptor is 64bit */
+#define LTQ_DESC_NUM		0x40	/* 64 descriptors / channel */
+
+#define LTQ_DMA_OWN		BIT(31) /* owner bit */
+#define LTQ_DMA_C		BIT(30) /* complete bit */
+#define LTQ_DMA_SOP		BIT(29) /* start of packet */
+#define LTQ_DMA_EOP		BIT(28) /* end of packet */
+#define LTQ_DMA_TX_OFFSET(x)	((x & 0x1f) << 23) /* data bytes offset */
+#define LTQ_DMA_RX_OFFSET(x)	((x & 0x7) << 23) /* data bytes offset */
+#define LTQ_DMA_SIZE_MASK	(0xffff) /* the size field is 16 bit */
+
+struct ltq_dma_desc {
+	u32 ctl;
+	u32 addr;
+};
+
+struct ltq_dma_channel {
+	int nr;				/* the channel number */
+	int irq;			/* the mapped irq */
+	int desc;			/* the current descriptor */
+	struct ltq_dma_desc *desc_base; /* the descriptor base */
+	int phys;			/* physical addr */
+};
+
+enum {
+	DMA_PORT_ETOP = 0,
+	DMA_PORT_DEU,
+};
+
+extern void ltq_dma_enable_irq(struct ltq_dma_channel *ch);
+extern void ltq_dma_disable_irq(struct ltq_dma_channel *ch);
+extern void ltq_dma_ack_irq(struct ltq_dma_channel *ch);
+extern void ltq_dma_open(struct ltq_dma_channel *ch);
+extern void ltq_dma_close(struct ltq_dma_channel *ch);
+extern void ltq_dma_alloc_tx(struct ltq_dma_channel *ch);
+extern void ltq_dma_alloc_rx(struct ltq_dma_channel *ch);
+extern void ltq_dma_free(struct ltq_dma_channel *ch);
+extern void ltq_dma_init_port(int p);
+
+#endif