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, 103 insertions, 0 deletions

diff --git a/kernel/drivers/atm/zatm.h b/kernel/drivers/atm/zatm.h
new file mode 100644
index 000000000..ae9165ce1
--- /dev/null
+++ b/kernel/drivers/atm/zatm.h
@@ -0,0 +1,103 @@
+/* drivers/atm/zatm.h - ZeitNet ZN122x device driver declarations */
+
+/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef DRIVER_ATM_ZATM_H
+#define DRIVER_ATM_ZATM_H
+
+#include <linux/skbuff.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/sonet.h>
+#include <linux/pci.h>
+
+
+#define DEV_LABEL	"zatm"
+
+#define MAX_AAL5_PDU	10240	/* allocate for AAL5 PDUs of this size */
+#define MAX_RX_SIZE_LD	14	/* ceil(log2((MAX_AAL5_PDU+47)/48)) */
+
+#define LOW_MARK	12	/* start adding new buffers if less than 12 */
+#define HIGH_MARK	30	/* stop adding buffers after reaching 30 */
+#define OFF_CNG_THRES	5	/* threshold for offset changes */
+
+#define RX_SIZE		2	/* RX lookup entry size (in bytes) */
+#define NR_POOLS	32	/* number of free buffer pointers */
+#define POOL_SIZE	8	/* buffer entry size (in bytes) */
+#define NR_SHAPERS	16	/* number of shapers */
+#define SHAPER_SIZE	4	/* shaper entry size (in bytes) */
+#define VC_SIZE		32	/* VC dsc (TX or RX) size (in bytes) */
+
+#define RING_ENTRIES	32	/* ring entries (without back pointer) */
+#define RING_WORDS	4	/* ring element size */
+#define RING_SIZE	(sizeof(unsigned long)*(RING_ENTRIES+1)*RING_WORDS)
+
+#define NR_MBX		4	/* four mailboxes */
+#define MBX_RX_0	0	/* mailbox indices */
+#define MBX_RX_1	1
+#define MBX_TX_0	2
+#define MBX_TX_1	3
+
+struct zatm_vcc {
+	/*-------------------------------- RX part */
+	int rx_chan;			/* RX channel, 0 if none */
+	int pool;			/* free buffer pool */
+	/*-------------------------------- TX part */
+	int tx_chan;			/* TX channel, 0 if none */
+	int shaper;			/* shaper, <0 if none */
+	struct sk_buff_head tx_queue;	/* list of buffers in transit */
+	wait_queue_head_t tx_wait;	/* for close */
+	u32 *ring;			/* transmit ring */
+	int ring_curr;			/* current write position */
+	int txing;			/* number of transmits in progress */
+	struct sk_buff_head backlog;	/* list of buffers waiting for ring */
+};
+
+struct zatm_dev {
+	/*-------------------------------- TX part */
+	int tx_bw;			/* remaining bandwidth */
+	u32 free_shapers;		/* bit set */
+	int ubr;			/* UBR shaper; -1 if none */
+	int ubr_ref_cnt;		/* number of VCs using UBR shaper */
+	/*-------------------------------- RX part */
+	int pool_ref[NR_POOLS];		/* free buffer pool usage counters */
+	volatile struct sk_buff *last_free[NR_POOLS];
+					/* last entry in respective pool */
+	struct sk_buff_head pool[NR_POOLS];/* free buffer pools */
+	struct zatm_pool_info pool_info[NR_POOLS]; /* pool information */
+	/*-------------------------------- maps */
+	struct atm_vcc **tx_map;	/* TX VCCs */
+	struct atm_vcc **rx_map;	/* RX VCCs */
+	int chans;			/* map size, must be 2^n */
+	/*-------------------------------- mailboxes */
+	unsigned long mbx_start[NR_MBX];/* start addresses */
+	dma_addr_t mbx_dma[NR_MBX];
+	u16 mbx_end[NR_MBX];		/* end offset (in bytes) */
+	/*-------------------------------- other pointers */
+	u32 pool_base;			/* Free buffer pool dsc (word addr) */
+	/*-------------------------------- ZATM links */
+	struct atm_dev *more;		/* other ZATM devices */
+	/*-------------------------------- general information */
+	int mem;			/* RAM on board (in bytes) */
+	int khz;			/* timer clock */
+	int copper;			/* PHY type */
+	unsigned char irq;		/* IRQ */
+	unsigned int base;		/* IO base address */
+	struct pci_dev *pci_dev;	/* PCI stuff */
+	spinlock_t lock;
+};
+
+
+#define ZATM_DEV(d) ((struct zatm_dev *) (d)->dev_data)
+#define ZATM_VCC(d) ((struct zatm_vcc *) (d)->dev_data)
+
+
+struct zatm_skb_prv {
+	struct atm_skb_data _;		/* reserved */
+	u32 *dsc;			/* pointer to skb's descriptor */
+};
+
+#define ZATM_PRV_DSC(skb) (((struct zatm_skb_prv *) (skb)->cb)->dsc)
+
+#endif