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, 160 insertions, 0 deletions

diff --git a/kernel/drivers/char/xillybus/xillybus.h b/kernel/drivers/char/xillybus/xillybus.h
new file mode 100644
index 000000000..b9a9eb6d4
--- /dev/null
+++ b/kernel/drivers/char/xillybus/xillybus.h
@@ -0,0 +1,160 @@
+/*
+ * linux/drivers/misc/xillybus.h
+ *
+ * Copyright 2011 Xillybus Ltd, http://xillybus.com
+ *
+ * Header file for the Xillybus FPGA/host framework.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the smems of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#ifndef __XILLYBUS_H
+#define __XILLYBUS_H
+
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/cdev.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+
+struct xilly_endpoint_hardware;
+
+struct xilly_buffer {
+	void *addr;
+	dma_addr_t dma_addr;
+	int end_offset; /* Counting elements, not bytes */
+};
+
+struct xilly_idt_handle {
+	unsigned char *chandesc;
+	unsigned char *idt;
+	int entries;
+};
+
+/*
+ * Read-write confusion: wr_* and rd_* notation sticks to FPGA view, so
+ * wr_* buffers are those consumed by read(), since the FPGA writes to them
+ * and vice versa.
+ */
+
+struct xilly_channel {
+	struct xilly_endpoint *endpoint;
+	int chan_num;
+	int log2_element_size;
+	int seekable;
+
+	struct xilly_buffer **wr_buffers; /* FPGA writes, driver reads! */
+	int num_wr_buffers;
+	unsigned int wr_buf_size; /* In bytes */
+	int wr_fpga_buf_idx;
+	int wr_host_buf_idx;
+	int wr_host_buf_pos;
+	int wr_empty;
+	int wr_ready; /* Significant only when wr_empty == 1 */
+	int wr_sleepy;
+	int wr_eof;
+	int wr_hangup;
+	spinlock_t wr_spinlock;
+	struct mutex wr_mutex;
+	wait_queue_head_t wr_wait;
+	wait_queue_head_t wr_ready_wait;
+	int wr_ref_count;
+	int wr_synchronous;
+	int wr_allow_partial;
+	int wr_exclusive_open;
+	int wr_supports_nonempty;
+
+	struct xilly_buffer **rd_buffers; /* FPGA reads, driver writes! */
+	int num_rd_buffers;
+	unsigned int rd_buf_size; /* In bytes */
+	int rd_fpga_buf_idx;
+	int rd_host_buf_pos;
+	int rd_host_buf_idx;
+	int rd_full;
+	spinlock_t rd_spinlock;
+	struct mutex rd_mutex;
+	wait_queue_head_t rd_wait;
+	int rd_ref_count;
+	int rd_allow_partial;
+	int rd_synchronous;
+	int rd_exclusive_open;
+	struct delayed_work rd_workitem;
+	unsigned char rd_leftovers[4];
+};
+
+struct xilly_endpoint {
+	/*
+	 * One of pdev and dev is always NULL, and the other is a valid
+	 * pointer, depending on the type of device
+	 */
+	struct pci_dev *pdev;
+	struct device *dev;
+	struct xilly_endpoint_hardware *ephw;
+
+	struct list_head ep_list;
+	int dma_using_dac; /* =1 if 64-bit DMA is used, =0 otherwise. */
+	__iomem void *registers;
+	int fatal_error;
+
+	struct mutex register_mutex;
+	wait_queue_head_t ep_wait;
+
+	/* Channels and message handling */
+	struct cdev cdev;
+
+	int major;
+	int lowest_minor; /* Highest minor = lowest_minor + num_channels - 1 */
+
+	int num_channels; /* EXCLUDING message buffer */
+	struct xilly_channel **channels;
+	int msg_counter;
+	int failed_messages;
+	int idtlen;
+
+	u32 *msgbuf_addr;
+	dma_addr_t msgbuf_dma_addr;
+	unsigned int msg_buf_size;
+};
+
+struct xilly_endpoint_hardware {
+	struct module *owner;
+	void (*hw_sync_sgl_for_cpu)(struct xilly_endpoint *,
+				    dma_addr_t,
+				    size_t,
+				    int);
+	void (*hw_sync_sgl_for_device)(struct xilly_endpoint *,
+				       dma_addr_t,
+				       size_t,
+				       int);
+	int (*map_single)(struct xilly_endpoint *,
+			  void *,
+			  size_t,
+			  int,
+			  dma_addr_t *);
+};
+
+struct xilly_mapping {
+	void *device;
+	dma_addr_t dma_addr;
+	size_t size;
+	int direction;
+};
+
+irqreturn_t xillybus_isr(int irq, void *data);
+
+struct xilly_endpoint *xillybus_init_endpoint(struct pci_dev *pdev,
+					      struct device *dev,
+					      struct xilly_endpoint_hardware
+					      *ephw);
+
+int xillybus_endpoint_discovery(struct xilly_endpoint *endpoint);
+
+void xillybus_endpoint_remove(struct xilly_endpoint *endpoint);
+
+#endif /* __XILLYBUS_H */