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, 633 insertions, 0 deletions

diff --git a/kernel/drivers/net/ethernet/cirrus/mac89x0.c b/kernel/drivers/net/ethernet/cirrus/mac89x0.c
new file mode 100644
index 000000000..07719676c
--- /dev/null
+++ b/kernel/drivers/net/ethernet/cirrus/mac89x0.c
@@ -0,0 +1,633 @@
+/* mac89x0.c: A Crystal Semiconductor CS89[02]0 driver for linux. */
+/*
+	Written 1996 by Russell Nelson, with reference to skeleton.c
+	written 1993-1994 by Donald Becker.
+
+	This software may be used and distributed according to the terms
+	of the GNU General Public License, incorporated herein by reference.
+
+	The author may be reached at nelson@crynwr.com, Crynwr
+	Software, 11 Grant St., Potsdam, NY 13676
+
+  Changelog:
+
+  Mike Cruse        : mcruse@cti-ltd.com
+                    : Changes for Linux 2.0 compatibility.
+                    : Added dev_id parameter in net_interrupt(),
+                    : request_irq() and free_irq(). Just NULL for now.
+
+  Mike Cruse        : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros
+                    : in net_open() and net_close() so kerneld would know
+                    : that the module is in use and wouldn't eject the
+                    : driver prematurely.
+
+  Mike Cruse        : Rewrote init_module() and cleanup_module using 8390.c
+                    : as an example. Disabled autoprobing in init_module(),
+                    : not a good thing to do to other devices while Linux
+                    : is running from all accounts.
+
+  Alan Cox          : Removed 1.2 support, added 2.1 extra counters.
+
+  David Huggins-Daines <dhd@debian.org>
+
+  Split this off into mac89x0.c, and gutted it of all parts which are
+  not relevant to the existing CS8900 cards on the Macintosh
+  (i.e. basically the Daynaport CS and LC cards).  To be precise:
+
+    * Removed all the media-detection stuff, because these cards are
+    TP-only.
+
+    * Lobotomized the ISA interrupt bogosity, because these cards use
+    a hardwired NuBus interrupt and a magic ISAIRQ value in the card.
+
+    * Basically eliminated everything not relevant to getting the
+    cards minimally functioning on the Macintosh.
+
+  I might add that these cards are badly designed even from the Mac
+  standpoint, in that Dayna, in their infinite wisdom, used NuBus slot
+  I/O space and NuBus interrupts for these cards, but neglected to
+  provide anything even remotely resembling a NuBus ROM.  Therefore we
+  have to probe for them in a brain-damaged ISA-like fashion.
+
+  Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001
+  check kmalloc and release the allocated memory on failure in
+  mac89x0_probe and in init_module
+  use local_irq_{save,restore}(flags) in net_get_stat, not just
+  local_irq_{dis,en}able()
+*/
+
+static char *version =
+"cs89x0.c:v1.02 11/26/96 Russell Nelson <nelson@crynwr.com>\n";
+
+/* ======================= configure the driver here ======================= */
+
+/* use 0 for production, 1 for verification, >2 for debug */
+#ifndef NET_DEBUG
+#define NET_DEBUG 0
+#endif
+
+/* ======================= end of configuration ======================= */
+
+
+/* Always include 'config.h' first in case the user wants to turn on
+   or override something. */
+#include <linux/module.h>
+
+/*
+  Sources:
+
+	Crynwr packet driver epktisa.
+
+	Crystal Semiconductor data sheets.
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/nubus.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/gfp.h>
+
+#include <asm/io.h>
+#include <asm/hwtest.h>
+#include <asm/macints.h>
+
+#include "cs89x0.h"
+
+static unsigned int net_debug = NET_DEBUG;
+
+/* Information that need to be kept for each board. */
+struct net_local {
+	int chip_type;		/* one of: CS8900, CS8920, CS8920M */
+	char chip_revision;	/* revision letter of the chip ('A'...) */
+	int send_cmd;		/* the propercommand used to send a packet. */
+	int rx_mode;
+	int curr_rx_cfg;
+        int send_underrun;      /* keep track of how many underruns in a row we get */
+	struct sk_buff *skb;
+};
+
+/* Index to functions, as function prototypes. */
+
+#if 0
+extern void reset_chip(struct net_device *dev);
+#endif
+static int net_open(struct net_device *dev);
+static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t net_interrupt(int irq, void *dev_id);
+static void set_multicast_list(struct net_device *dev);
+static void net_rx(struct net_device *dev);
+static int net_close(struct net_device *dev);
+static struct net_device_stats *net_get_stats(struct net_device *dev);
+static int set_mac_address(struct net_device *dev, void *addr);
+
+
+/* Example routines you must write ;->. */
+#define tx_done(dev) 1
+
+/* For reading/writing registers ISA-style */
+static inline int
+readreg_io(struct net_device *dev, int portno)
+{
+	nubus_writew(swab16(portno), dev->base_addr + ADD_PORT);
+	return swab16(nubus_readw(dev->base_addr + DATA_PORT));
+}
+
+static inline void
+writereg_io(struct net_device *dev, int portno, int value)
+{
+	nubus_writew(swab16(portno), dev->base_addr + ADD_PORT);
+	nubus_writew(swab16(value), dev->base_addr + DATA_PORT);
+}
+
+/* These are for reading/writing registers in shared memory */
+static inline int
+readreg(struct net_device *dev, int portno)
+{
+	return swab16(nubus_readw(dev->mem_start + portno));
+}
+
+static inline void
+writereg(struct net_device *dev, int portno, int value)
+{
+	nubus_writew(swab16(value), dev->mem_start + portno);
+}
+
+static const struct net_device_ops mac89x0_netdev_ops = {
+	.ndo_open		= net_open,
+	.ndo_stop		= net_close,
+	.ndo_start_xmit		= net_send_packet,
+	.ndo_get_stats		= net_get_stats,
+	.ndo_set_rx_mode	= set_multicast_list,
+	.ndo_set_mac_address	= set_mac_address,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_change_mtu		= eth_change_mtu,
+};
+
+/* Probe for the CS8900 card in slot E.  We won't bother looking
+   anywhere else until we have a really good reason to do so. */
+struct net_device * __init mac89x0_probe(int unit)
+{
+	struct net_device *dev;
+	static int once_is_enough;
+	struct net_local *lp;
+	static unsigned version_printed;
+	int i, slot;
+	unsigned rev_type = 0;
+	unsigned long ioaddr;
+	unsigned short sig;
+	int err = -ENODEV;
+
+	if (!MACH_IS_MAC)
+		return ERR_PTR(-ENODEV);
+
+	dev = alloc_etherdev(sizeof(struct net_local));
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	if (unit >= 0) {
+		sprintf(dev->name, "eth%d", unit);
+		netdev_boot_setup_check(dev);
+	}
+
+	if (once_is_enough)
+		goto out;
+	once_is_enough = 1;
+
+	/* We might have to parameterize this later */
+	slot = 0xE;
+	/* Get out now if there's a real NuBus card in slot E */
+	if (nubus_find_slot(slot, NULL) != NULL)
+		goto out;
+
+	/* The pseudo-ISA bits always live at offset 0x300 (gee,
+           wonder why...) */
+	ioaddr = (unsigned long)
+		nubus_slot_addr(slot) | (((slot&0xf) << 20) + DEFAULTIOBASE);
+	{
+		int card_present;
+
+		card_present = (hwreg_present((void *)ioaddr + 4) &&
+				hwreg_present((void *)ioaddr + DATA_PORT));
+		if (!card_present)
+			goto out;
+	}
+
+	nubus_writew(0, ioaddr + ADD_PORT);
+	sig = nubus_readw(ioaddr + DATA_PORT);
+	if (sig != swab16(CHIP_EISA_ID_SIG))
+		goto out;
+
+	/* Initialize the net_device structure. */
+	lp = netdev_priv(dev);
+
+	/* Fill in the 'dev' fields. */
+	dev->base_addr = ioaddr;
+	dev->mem_start = (unsigned long)
+		nubus_slot_addr(slot) | (((slot&0xf) << 20) + MMIOBASE);
+	dev->mem_end = dev->mem_start + 0x1000;
+
+	/* Turn on shared memory */
+	writereg_io(dev, PP_BusCTL, MEMORY_ON);
+
+	/* get the chip type */
+	rev_type = readreg(dev, PRODUCT_ID_ADD);
+	lp->chip_type = rev_type &~ REVISON_BITS;
+	lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
+
+	/* Check the chip type and revision in order to set the correct send command
+	CS8920 revision C and CS8900 revision F can use the faster send. */
+	lp->send_cmd = TX_AFTER_381;
+	if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
+		lp->send_cmd = TX_NOW;
+	if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
+		lp->send_cmd = TX_NOW;
+
+	if (net_debug && version_printed++ == 0)
+		printk(version);
+
+	printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#8lx",
+	       dev->name,
+	       lp->chip_type==CS8900?'0':'2',
+	       lp->chip_type==CS8920M?"M":"",
+	       lp->chip_revision,
+	       dev->base_addr);
+
+	/* Try to read the MAC address */
+	if ((readreg(dev, PP_SelfST) & (EEPROM_PRESENT | EEPROM_OK)) == 0) {
+		printk("\nmac89x0: No EEPROM, giving up now.\n");
+		goto out1;
+        } else {
+                for (i = 0; i < ETH_ALEN; i += 2) {
+			/* Big-endian (why??!) */
+			unsigned short s = readreg(dev, PP_IA + i);
+                        dev->dev_addr[i] = s >> 8;
+                        dev->dev_addr[i+1] = s & 0xff;
+                }
+        }
+
+	dev->irq = SLOT2IRQ(slot);
+
+	/* print the IRQ and ethernet address. */
+
+	printk(" IRQ %d ADDR %pM\n", dev->irq, dev->dev_addr);
+
+	dev->netdev_ops		= &mac89x0_netdev_ops;
+
+	err = register_netdev(dev);
+	if (err)
+		goto out1;
+	return NULL;
+out1:
+	nubus_writew(0, dev->base_addr + ADD_PORT);
+out:
+	free_netdev(dev);
+	return ERR_PTR(err);
+}
+
+#if 0
+/* This is useful for something, but I don't know what yet. */
+void __init reset_chip(struct net_device *dev)
+{
+	int reset_start_time;
+
+	writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
+
+	/* wait 30 ms */
+	msleep_interruptible(30);
+
+	/* Wait until the chip is reset */
+	reset_start_time = jiffies;
+	while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
+		;
+}
+#endif
+
+/* Open/initialize the board.  This is called (in the current kernel)
+   sometime after booting when the 'ifconfig' program is run.
+
+   This routine should set everything up anew at each open, even
+   registers that "should" only need to be set once at boot, so that
+   there is non-reboot way to recover if something goes wrong.
+   */
+static int
+net_open(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	int i;
+
+	/* Disable the interrupt for now */
+	writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) & ~ENABLE_IRQ);
+
+	/* Grab the interrupt */
+	if (request_irq(dev->irq, net_interrupt, 0, "cs89x0", dev))
+		return -EAGAIN;
+
+	/* Set up the IRQ - Apparently magic */
+	if (lp->chip_type == CS8900)
+		writereg(dev, PP_CS8900_ISAINT, 0);
+	else
+		writereg(dev, PP_CS8920_ISAINT, 0);
+
+	/* set the Ethernet address */
+	for (i=0; i < ETH_ALEN/2; i++)
+		writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
+
+	/* Turn on both receive and transmit operations */
+	writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
+
+	/* Receive only error free packets addressed to this card */
+	lp->rx_mode = 0;
+	writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
+
+	lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
+
+	writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
+
+	writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
+	       TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
+
+	writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
+		 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
+
+	/* now that we've got our act together, enable everything */
+	writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
+	netif_start_queue(dev);
+	return 0;
+}
+
+static int
+net_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	unsigned long flags;
+
+	if (net_debug > 3)
+		printk("%s: sent %d byte packet of type %x\n",
+		       dev->name, skb->len,
+		       (skb->data[ETH_ALEN+ETH_ALEN] << 8)
+		       | skb->data[ETH_ALEN+ETH_ALEN+1]);
+
+	/* keep the upload from being interrupted, since we
+	   ask the chip to start transmitting before the
+	   whole packet has been completely uploaded. */
+	local_irq_save(flags);
+	netif_stop_queue(dev);
+
+	/* initiate a transmit sequence */
+	writereg(dev, PP_TxCMD, lp->send_cmd);
+	writereg(dev, PP_TxLength, skb->len);
+
+	/* Test to see if the chip has allocated memory for the packet */
+	if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
+		/* Gasp!  It hasn't.  But that shouldn't happen since
+		   we're waiting for TxOk, so return 1 and requeue this packet. */
+		local_irq_restore(flags);
+		return NETDEV_TX_BUSY;
+	}
+
+	/* Write the contents of the packet */
+	skb_copy_from_linear_data(skb, (void *)(dev->mem_start + PP_TxFrame),
+				  skb->len+1);
+
+	local_irq_restore(flags);
+	dev_kfree_skb (skb);
+
+	return NETDEV_TX_OK;
+}
+
+/* The typical workload of the driver:
+   Handle the network interface interrupts. */
+static irqreturn_t net_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct net_local *lp;
+	int ioaddr, status;
+
+	if (dev == NULL) {
+		printk ("net_interrupt(): irq %d for unknown device.\n", irq);
+		return IRQ_NONE;
+	}
+
+	ioaddr = dev->base_addr;
+	lp = netdev_priv(dev);
+
+	/* we MUST read all the events out of the ISQ, otherwise we'll never
+           get interrupted again.  As a consequence, we can't have any limit
+           on the number of times we loop in the interrupt handler.  The
+           hardware guarantees that eventually we'll run out of events.  Of
+           course, if you're on a slow machine, and packets are arriving
+           faster than you can read them off, you're screwed.  Hasta la
+           vista, baby!  */
+	while ((status = swab16(nubus_readw(dev->base_addr + ISQ_PORT)))) {
+		if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
+		switch(status & ISQ_EVENT_MASK) {
+		case ISQ_RECEIVER_EVENT:
+			/* Got a packet(s). */
+			net_rx(dev);
+			break;
+		case ISQ_TRANSMITTER_EVENT:
+			dev->stats.tx_packets++;
+			netif_wake_queue(dev);
+			if ((status & TX_OK) == 0)
+				dev->stats.tx_errors++;
+			if (status & TX_LOST_CRS)
+				dev->stats.tx_carrier_errors++;
+			if (status & TX_SQE_ERROR)
+				dev->stats.tx_heartbeat_errors++;
+			if (status & TX_LATE_COL)
+				dev->stats.tx_window_errors++;
+			if (status & TX_16_COL)
+				dev->stats.tx_aborted_errors++;
+			break;
+		case ISQ_BUFFER_EVENT:
+			if (status & READY_FOR_TX) {
+				/* we tried to transmit a packet earlier,
+                                   but inexplicably ran out of buffers.
+                                   That shouldn't happen since we only ever
+                                   load one packet.  Shrug.  Do the right
+                                   thing anyway. */
+				netif_wake_queue(dev);
+			}
+			if (status & TX_UNDERRUN) {
+				if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
+                                lp->send_underrun++;
+                                if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
+                                else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
+                        }
+			break;
+		case ISQ_RX_MISS_EVENT:
+			dev->stats.rx_missed_errors += (status >> 6);
+			break;
+		case ISQ_TX_COL_EVENT:
+			dev->stats.collisions += (status >> 6);
+			break;
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+/* We have a good packet(s), get it/them out of the buffers. */
+static void
+net_rx(struct net_device *dev)
+{
+	struct sk_buff *skb;
+	int status, length;
+
+	status = readreg(dev, PP_RxStatus);
+	if ((status & RX_OK) == 0) {
+		dev->stats.rx_errors++;
+		if (status & RX_RUNT)
+				dev->stats.rx_length_errors++;
+		if (status & RX_EXTRA_DATA)
+				dev->stats.rx_length_errors++;
+		if ((status & RX_CRC_ERROR) &&
+		    !(status & (RX_EXTRA_DATA|RX_RUNT)))
+			/* per str 172 */
+			dev->stats.rx_crc_errors++;
+		if (status & RX_DRIBBLE)
+				dev->stats.rx_frame_errors++;
+		return;
+	}
+
+	length = readreg(dev, PP_RxLength);
+	/* Malloc up new buffer. */
+	skb = alloc_skb(length, GFP_ATOMIC);
+	if (skb == NULL) {
+		printk("%s: Memory squeeze, dropping packet.\n", dev->name);
+		dev->stats.rx_dropped++;
+		return;
+	}
+	skb_put(skb, length);
+
+	skb_copy_to_linear_data(skb, (void *)(dev->mem_start + PP_RxFrame),
+				length);
+
+	if (net_debug > 3)printk("%s: received %d byte packet of type %x\n",
+                                 dev->name, length,
+                                 (skb->data[ETH_ALEN+ETH_ALEN] << 8)
+				 | skb->data[ETH_ALEN+ETH_ALEN+1]);
+
+        skb->protocol=eth_type_trans(skb,dev);
+	netif_rx(skb);
+	dev->stats.rx_packets++;
+	dev->stats.rx_bytes += length;
+}
+
+/* The inverse routine to net_open(). */
+static int
+net_close(struct net_device *dev)
+{
+
+	writereg(dev, PP_RxCFG, 0);
+	writereg(dev, PP_TxCFG, 0);
+	writereg(dev, PP_BufCFG, 0);
+	writereg(dev, PP_BusCTL, 0);
+
+	netif_stop_queue(dev);
+
+	free_irq(dev->irq, dev);
+
+	/* Update the statistics here. */
+
+	return 0;
+
+}
+
+/* Get the current statistics.	This may be called with the card open or
+   closed. */
+static struct net_device_stats *
+net_get_stats(struct net_device *dev)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	/* Update the statistics from the device registers. */
+	dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
+	dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
+	local_irq_restore(flags);
+
+	return &dev->stats;
+}
+
+static void set_multicast_list(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+
+	if(dev->flags&IFF_PROMISC)
+	{
+		lp->rx_mode = RX_ALL_ACCEPT;
+	} else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) {
+		/* The multicast-accept list is initialized to accept-all, and we
+		   rely on higher-level filtering for now. */
+		lp->rx_mode = RX_MULTCAST_ACCEPT;
+	}
+	else
+		lp->rx_mode = 0;
+
+	writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
+
+	/* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
+	writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
+	     (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
+}
+
+
+static int set_mac_address(struct net_device *dev, void *addr)
+{
+	struct sockaddr *saddr = addr;
+	int i;
+
+	if (!is_valid_ether_addr(saddr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
+	printk("%s: Setting MAC address to %pM\n", dev->name, dev->dev_addr);
+
+	/* set the Ethernet address */
+	for (i=0; i < ETH_ALEN/2; i++)
+		writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
+
+	return 0;
+}
+
+#ifdef MODULE
+
+static struct net_device *dev_cs89x0;
+static int debug;
+
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "CS89[02]0 debug level (0-5)");
+MODULE_LICENSE("GPL");
+
+int __init
+init_module(void)
+{
+	net_debug = debug;
+        dev_cs89x0 = mac89x0_probe(-1);
+	if (IS_ERR(dev_cs89x0)) {
+                printk(KERN_WARNING "mac89x0.c: No card found\n");
+		return PTR_ERR(dev_cs89x0);
+	}
+	return 0;
+}
+
+void
+cleanup_module(void)
+{
+	unregister_netdev(dev_cs89x0);
+	nubus_writew(0, dev_cs89x0->base_addr + ADD_PORT);
+	free_netdev(dev_cs89x0);
+}
+#endif /* MODULE */