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, 352 insertions, 0 deletions

diff --git a/kernel/drivers/net/wan/hostess_sv11.c b/kernel/drivers/net/wan/hostess_sv11.c
new file mode 100644
index 000000000..3d741663f
--- /dev/null
+++ b/kernel/drivers/net/wan/hostess_sv11.c
@@ -0,0 +1,352 @@
+/*
+ *	Comtrol SV11 card driver
+ *
+ *	This is a slightly odd Z85230 synchronous driver. All you need to
+ *	know basically is
+ *
+ *	Its a genuine Z85230
+ *
+ *	It supports DMA using two DMA channels in SYNC mode. The driver doesn't
+ *	use these facilities
+ *	
+ *	The control port is at io+1, the data at io+3 and turning off the DMA
+ *	is done by writing 0 to io+4
+ *
+ *	The hardware does the bus handling to avoid the need for delays between
+ *	touching control registers.
+ *
+ *	Port B isn't wired (why - beats me)
+ *
+ *	Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/net.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/delay.h>
+#include <linux/hdlc.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <net/arp.h>
+
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/byteorder.h>
+#include "z85230.h"
+
+static int dma;
+
+/*
+ *	Network driver support routines
+ */
+
+static inline struct z8530_dev* dev_to_sv(struct net_device *dev)
+{
+	return (struct z8530_dev *)dev_to_hdlc(dev)->priv;
+}
+
+/*
+ *	Frame receive. Simple for our card as we do HDLC and there
+ *	is no funny garbage involved
+ */
+
+static void hostess_input(struct z8530_channel *c, struct sk_buff *skb)
+{
+	/* Drop the CRC - it's not a good idea to try and negotiate it ;) */
+	skb_trim(skb, skb->len - 2);
+	skb->protocol = hdlc_type_trans(skb, c->netdevice);
+	skb_reset_mac_header(skb);
+	skb->dev = c->netdevice;
+	/*
+	 *	Send it to the PPP layer. We don't have time to process
+	 *	it right now.
+	 */
+	netif_rx(skb);
+}
+
+/*
+ *	We've been placed in the UP state
+ */
+
+static int hostess_open(struct net_device *d)
+{
+	struct z8530_dev *sv11 = dev_to_sv(d);
+	int err = -1;
+
+	/*
+	 *	Link layer up
+	 */
+	switch (dma) {
+		case 0:
+			err = z8530_sync_open(d, &sv11->chanA);
+			break;
+		case 1:
+			err = z8530_sync_dma_open(d, &sv11->chanA);
+			break;
+		case 2:
+			err = z8530_sync_txdma_open(d, &sv11->chanA);
+			break;
+	}
+
+	if (err)
+		return err;
+
+	err = hdlc_open(d);
+	if (err) {
+		switch (dma) {
+			case 0:
+				z8530_sync_close(d, &sv11->chanA);
+				break;
+			case 1:
+				z8530_sync_dma_close(d, &sv11->chanA);
+				break;
+			case 2:
+				z8530_sync_txdma_close(d, &sv11->chanA);
+				break;
+		}
+		return err;
+	}
+	sv11->chanA.rx_function = hostess_input;
+
+	/*
+	 *	Go go go
+	 */
+
+	netif_start_queue(d);
+	return 0;
+}
+
+static int hostess_close(struct net_device *d)
+{
+	struct z8530_dev *sv11 = dev_to_sv(d);
+	/*
+	 *	Discard new frames
+	 */
+	sv11->chanA.rx_function = z8530_null_rx;
+
+	hdlc_close(d);
+	netif_stop_queue(d);
+
+	switch (dma) {
+		case 0:
+			z8530_sync_close(d, &sv11->chanA);
+			break;
+		case 1:
+			z8530_sync_dma_close(d, &sv11->chanA);
+			break;
+		case 2:
+			z8530_sync_txdma_close(d, &sv11->chanA);
+			break;
+	}
+	return 0;
+}
+
+static int hostess_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
+{
+	/* struct z8530_dev *sv11=dev_to_sv(d);
+	   z8530_ioctl(d,&sv11->chanA,ifr,cmd) */
+	return hdlc_ioctl(d, ifr, cmd);
+}
+
+/*
+ *	Passed network frames, fire them downwind.
+ */
+
+static netdev_tx_t hostess_queue_xmit(struct sk_buff *skb,
+					    struct net_device *d)
+{
+	return z8530_queue_xmit(&dev_to_sv(d)->chanA, skb);
+}
+
+static int hostess_attach(struct net_device *dev, unsigned short encoding,
+			  unsigned short parity)
+{
+	if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
+		return 0;
+	return -EINVAL;
+}
+
+/*
+ *	Description block for a Comtrol Hostess SV11 card
+ */
+
+static const struct net_device_ops hostess_ops = {
+	.ndo_open       = hostess_open,
+	.ndo_stop       = hostess_close,
+	.ndo_change_mtu = hdlc_change_mtu,
+	.ndo_start_xmit = hdlc_start_xmit,
+	.ndo_do_ioctl   = hostess_ioctl,
+};
+
+static struct z8530_dev *sv11_init(int iobase, int irq)
+{
+	struct z8530_dev *sv;
+	struct net_device *netdev;
+	/*
+	 *	Get the needed I/O space
+	 */
+
+	if (!request_region(iobase, 8, "Comtrol SV11")) {
+		pr_warn("I/O 0x%X already in use\n", iobase);
+		return NULL;
+	}
+
+	sv = kzalloc(sizeof(struct z8530_dev), GFP_KERNEL);
+	if (!sv)
+		goto err_kzalloc;
+
+	/*
+	 *	Stuff in the I/O addressing
+	 */
+
+	sv->active = 0;
+
+	sv->chanA.ctrlio = iobase + 1;
+	sv->chanA.dataio = iobase + 3;
+	sv->chanB.ctrlio = -1;
+	sv->chanB.dataio = -1;
+	sv->chanA.irqs = &z8530_nop;
+	sv->chanB.irqs = &z8530_nop;
+
+	outb(0, iobase + 4);		/* DMA off */
+
+	/* We want a fast IRQ for this device. Actually we'd like an even faster
+	   IRQ ;) - This is one driver RtLinux is made for */
+
+	if (request_irq(irq, z8530_interrupt, 0,
+			"Hostess SV11", sv) < 0) {
+		pr_warn("IRQ %d already in use\n", irq);
+		goto err_irq;
+	}
+
+	sv->irq = irq;
+	sv->chanA.private = sv;
+	sv->chanA.dev = sv;
+	sv->chanB.dev = sv;
+
+	if (dma) {
+		/*
+		 *	You can have DMA off or 1 and 3 thats the lot
+		 *	on the Comtrol.
+		 */
+		sv->chanA.txdma = 3;
+		sv->chanA.rxdma = 1;
+		outb(0x03 | 0x08, iobase + 4);		/* DMA on */
+		if (request_dma(sv->chanA.txdma, "Hostess SV/11 (TX)"))
+			goto err_txdma;
+
+		if (dma == 1)
+			if (request_dma(sv->chanA.rxdma, "Hostess SV/11 (RX)"))
+				goto err_rxdma;
+	}
+
+	/* Kill our private IRQ line the hostess can end up chattering
+	   until the configuration is set */
+	disable_irq(irq);
+
+	/*
+	 *	Begin normal initialise
+	 */
+
+	if (z8530_init(sv)) {
+		pr_err("Z8530 series device not found\n");
+		enable_irq(irq);
+		goto free_dma;
+	}
+	z8530_channel_load(&sv->chanB, z8530_dead_port);
+	if (sv->type == Z85C30)
+		z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream);
+	else
+		z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream_85230);
+
+	enable_irq(irq);
+
+	/*
+	 *	Now we can take the IRQ
+	 */
+
+	sv->chanA.netdevice = netdev = alloc_hdlcdev(sv);
+	if (!netdev)
+		goto free_dma;
+
+	dev_to_hdlc(netdev)->attach = hostess_attach;
+	dev_to_hdlc(netdev)->xmit = hostess_queue_xmit;
+	netdev->netdev_ops = &hostess_ops;
+	netdev->base_addr = iobase;
+	netdev->irq = irq;
+
+	if (register_hdlc_device(netdev)) {
+		pr_err("unable to register HDLC device\n");
+		free_netdev(netdev);
+		goto free_dma;
+	}
+
+	z8530_describe(sv, "I/O", iobase);
+	sv->active = 1;
+	return sv;
+
+free_dma:
+	if (dma == 1)
+		free_dma(sv->chanA.rxdma);
+err_rxdma:
+	if (dma)
+		free_dma(sv->chanA.txdma);
+err_txdma:
+	free_irq(irq, sv);
+err_irq:
+	kfree(sv);
+err_kzalloc:
+	release_region(iobase, 8);
+	return NULL;
+}
+
+static void sv11_shutdown(struct z8530_dev *dev)
+{
+	unregister_hdlc_device(dev->chanA.netdevice);
+	z8530_shutdown(dev);
+	free_irq(dev->irq, dev);
+	if (dma) {
+		if (dma == 1)
+			free_dma(dev->chanA.rxdma);
+		free_dma(dev->chanA.txdma);
+	}
+	release_region(dev->chanA.ctrlio - 1, 8);
+	free_netdev(dev->chanA.netdevice);
+	kfree(dev);
+}
+
+static int io = 0x200;
+static int irq = 9;
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card");
+module_param(dma, int, 0);
+MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX");
+module_param(irq, int, 0);
+MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card");
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11");
+
+static struct z8530_dev *sv11_unit;
+
+int init_module(void)
+{
+	if ((sv11_unit = sv11_init(io, irq)) == NULL)
+		return -ENODEV;
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	if (sv11_unit)
+		sv11_shutdown(sv11_unit);
+}