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, 531 insertions, 0 deletions

diff --git a/kernel/drivers/ide/ide-iops.c b/kernel/drivers/ide/ide-iops.c
new file mode 100644
index 000000000..f014dd1b7
--- /dev/null
+++ b/kernel/drivers/ide/ide-iops.c
@@ -0,0 +1,531 @@
+/*
+ *  Copyright (C) 2000-2002	Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2003		Red Hat
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/blkpg.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/bitops.h>
+#include <linux/nmi.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+void SELECT_MASK(ide_drive_t *drive, int mask)
+{
+	const struct ide_port_ops *port_ops = drive->hwif->port_ops;
+
+	if (port_ops && port_ops->maskproc)
+		port_ops->maskproc(drive, mask);
+}
+
+u8 ide_read_error(ide_drive_t *drive)
+{
+	struct ide_taskfile tf;
+
+	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR);
+
+	return tf.error;
+}
+EXPORT_SYMBOL_GPL(ide_read_error);
+
+void ide_fix_driveid(u16 *id)
+{
+#ifndef __LITTLE_ENDIAN
+# ifdef __BIG_ENDIAN
+	int i;
+
+	for (i = 0; i < 256; i++)
+		id[i] = __le16_to_cpu(id[i]);
+# else
+#  error "Please fix <asm/byteorder.h>"
+# endif
+#endif
+}
+
+/*
+ * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
+ * removing leading/trailing blanks and compressing internal blanks.
+ * It is primarily used to tidy up the model name/number fields as
+ * returned by the ATA_CMD_ID_ATA[PI] commands.
+ */
+
+void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
+{
+	u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
+
+	if (byteswap) {
+		/* convert from big-endian to host byte order */
+		for (p = s ; p != end ; p += 2)
+			be16_to_cpus((u16 *) p);
+	}
+
+	/* strip leading blanks */
+	p = s;
+	while (s != end && *s == ' ')
+		++s;
+	/* compress internal blanks and strip trailing blanks */
+	while (s != end && *s) {
+		if (*s++ != ' ' || (s != end && *s && *s != ' '))
+			*p++ = *(s-1);
+	}
+	/* wipe out trailing garbage */
+	while (p != end)
+		*p++ = '\0';
+}
+EXPORT_SYMBOL(ide_fixstring);
+
+/*
+ * This routine busy-waits for the drive status to be not "busy".
+ * It then checks the status for all of the "good" bits and none
+ * of the "bad" bits, and if all is okay it returns 0.  All other
+ * cases return error -- caller may then invoke ide_error().
+ *
+ * This routine should get fixed to not hog the cpu during extra long waits..
+ * That could be done by busy-waiting for the first jiffy or two, and then
+ * setting a timer to wake up at half second intervals thereafter,
+ * until timeout is achieved, before timing out.
+ */
+int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
+		    unsigned long timeout, u8 *rstat)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	unsigned long flags;
+	int i;
+	u8 stat;
+
+	udelay(1);	/* spec allows drive 400ns to assert "BUSY" */
+	stat = tp_ops->read_status(hwif);
+
+	if (stat & ATA_BUSY) {
+		local_save_flags(flags);
+		local_irq_enable_in_hardirq();
+		timeout += jiffies;
+		while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
+			if (time_after(jiffies, timeout)) {
+				/*
+				 * One last read after the timeout in case
+				 * heavy interrupt load made us not make any
+				 * progress during the timeout..
+				 */
+				stat = tp_ops->read_status(hwif);
+				if ((stat & ATA_BUSY) == 0)
+					break;
+
+				local_irq_restore_nort(flags);
+				*rstat = stat;
+				return -EBUSY;
+			}
+		}
+		local_irq_restore_nort(flags);
+	}
+	/*
+	 * Allow status to settle, then read it again.
+	 * A few rare drives vastly violate the 400ns spec here,
+	 * so we'll wait up to 10usec for a "good" status
+	 * rather than expensively fail things immediately.
+	 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
+	 */
+	for (i = 0; i < 10; i++) {
+		udelay(1);
+		stat = tp_ops->read_status(hwif);
+
+		if (OK_STAT(stat, good, bad)) {
+			*rstat = stat;
+			return 0;
+		}
+	}
+	*rstat = stat;
+	return -EFAULT;
+}
+
+/*
+ * In case of error returns error value after doing "*startstop = ide_error()".
+ * The caller should return the updated value of "startstop" in this case,
+ * "startstop" is unchanged when the function returns 0.
+ */
+int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
+		  u8 bad, unsigned long timeout)
+{
+	int err;
+	u8 stat;
+
+	/* bail early if we've exceeded max_failures */
+	if (drive->max_failures && (drive->failures > drive->max_failures)) {
+		*startstop = ide_stopped;
+		return 1;
+	}
+
+	err = __ide_wait_stat(drive, good, bad, timeout, &stat);
+
+	if (err) {
+		char *s = (err == -EBUSY) ? "status timeout" : "status error";
+		*startstop = ide_error(drive, s, stat);
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(ide_wait_stat);
+
+/**
+ *	ide_in_drive_list	-	look for drive in black/white list
+ *	@id: drive identifier
+ *	@table: list to inspect
+ *
+ *	Look for a drive in the blacklist and the whitelist tables
+ *	Returns 1 if the drive is found in the table.
+ */
+
+int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
+{
+	for ( ; table->id_model; table++)
+		if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
+		    (!table->id_firmware ||
+		     strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
+			return 1;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_in_drive_list);
+
+/*
+ * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
+ * Some optical devices with the buggy firmwares have the same problem.
+ */
+static const struct drive_list_entry ivb_list[] = {
+	{ "QUANTUM FIREBALLlct10 05"	, "A03.0900"	},
+	{ "QUANTUM FIREBALLlct20 30"	, "APL.0900"	},
+	{ "TSSTcorp CDDVDW SH-S202J"	, "SB00"	},
+	{ "TSSTcorp CDDVDW SH-S202J"	, "SB01"	},
+	{ "TSSTcorp CDDVDW SH-S202N"	, "SB00"	},
+	{ "TSSTcorp CDDVDW SH-S202N"	, "SB01"	},
+	{ "TSSTcorp CDDVDW SH-S202H"	, "SB00"	},
+	{ "TSSTcorp CDDVDW SH-S202H"	, "SB01"	},
+	{ "SAMSUNG SP0822N"		, "WA100-10"	},
+	{ NULL				, NULL		}
+};
+
+/*
+ *  All hosts that use the 80c ribbon must use!
+ *  The name is derived from upper byte of word 93 and the 80c ribbon.
+ */
+u8 eighty_ninty_three(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u16 *id = drive->id;
+	int ivb = ide_in_drive_list(id, ivb_list);
+
+	if (hwif->cbl == ATA_CBL_SATA || hwif->cbl == ATA_CBL_PATA40_SHORT)
+		return 1;
+
+	if (ivb)
+		printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
+				  drive->name);
+
+	if (ata_id_is_sata(id) && !ivb)
+		return 1;
+
+	if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
+		goto no_80w;
+
+	/*
+	 * FIXME:
+	 * - change master/slave IDENTIFY order
+	 * - force bit13 (80c cable present) check also for !ivb devices
+	 *   (unless the slave device is pre-ATA3)
+	 */
+	if (id[ATA_ID_HW_CONFIG] & 0x4000)
+		return 1;
+
+	if (ivb) {
+		const char *model = (char *)&id[ATA_ID_PROD];
+
+		if (strstr(model, "TSSTcorp CDDVDW SH-S202")) {
+			/*
+			 * These ATAPI devices always report 80c cable
+			 * so we have to depend on the host in this case.
+			 */
+			if (hwif->cbl == ATA_CBL_PATA80)
+				return 1;
+		} else {
+			/* Depend on the device side cable detection. */
+			if (id[ATA_ID_HW_CONFIG] & 0x2000)
+				return 1;
+		}
+	}
+no_80w:
+	if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
+		return 0;
+
+	printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
+			    "limiting max speed to UDMA33\n",
+			    drive->name,
+			    hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
+
+	drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
+
+	return 0;
+}
+
+static const char *nien_quirk_list[] = {
+	"QUANTUM FIREBALLlct08 08",
+	"QUANTUM FIREBALLP KA6.4",
+	"QUANTUM FIREBALLP KA9.1",
+	"QUANTUM FIREBALLP KX13.6",
+	"QUANTUM FIREBALLP KX20.5",
+	"QUANTUM FIREBALLP KX27.3",
+	"QUANTUM FIREBALLP LM20.4",
+	"QUANTUM FIREBALLP LM20.5",
+	"FUJITSU MHZ2160BH G2",
+	NULL
+};
+
+void ide_check_nien_quirk_list(ide_drive_t *drive)
+{
+	const char **list, *m = (char *)&drive->id[ATA_ID_PROD];
+
+	for (list = nien_quirk_list; *list != NULL; list++)
+		if (strstr(m, *list) != NULL) {
+			drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK;
+			return;
+		}
+}
+
+int ide_driveid_update(ide_drive_t *drive)
+{
+	u16 *id;
+	int rc;
+
+	id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
+	if (id == NULL)
+		return 0;
+
+	SELECT_MASK(drive, 1);
+	rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id, 1);
+	SELECT_MASK(drive, 0);
+
+	if (rc)
+		goto out_err;
+
+	drive->id[ATA_ID_UDMA_MODES]  = id[ATA_ID_UDMA_MODES];
+	drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
+	drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
+	drive->id[ATA_ID_CFA_MODES]   = id[ATA_ID_CFA_MODES];
+	/* anything more ? */
+
+	kfree(id);
+
+	return 1;
+out_err:
+	if (rc == 2)
+		printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
+	kfree(id);
+	return 0;
+}
+
+int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	struct ide_taskfile tf;
+	u16 *id = drive->id, i;
+	int error = 0;
+	u8 stat;
+
+#ifdef CONFIG_BLK_DEV_IDEDMA
+	if (hwif->dma_ops)	/* check if host supports DMA */
+		hwif->dma_ops->dma_host_set(drive, 0);
+#endif
+
+	/* Skip setting PIO flow-control modes on pre-EIDE drives */
+	if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
+		goto skip;
+
+	/*
+	 * Don't use ide_wait_cmd here - it will
+	 * attempt to set_geometry and recalibrate,
+	 * but for some reason these don't work at
+	 * this point (lost interrupt).
+	 */
+
+	udelay(1);
+	tp_ops->dev_select(drive);
+	SELECT_MASK(drive, 1);
+	udelay(1);
+	tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
+
+	memset(&tf, 0, sizeof(tf));
+	tf.feature = SETFEATURES_XFER;
+	tf.nsect   = speed;
+
+	tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE | IDE_VALID_NSECT);
+
+	tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
+
+	if (drive->dev_flags & IDE_DFLAG_NIEN_QUIRK)
+		tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+
+	error = __ide_wait_stat(drive, drive->ready_stat,
+				ATA_BUSY | ATA_DRQ | ATA_ERR,
+				WAIT_CMD, &stat);
+
+	SELECT_MASK(drive, 0);
+
+	if (error) {
+		(void) ide_dump_status(drive, "set_drive_speed_status", stat);
+		return error;
+	}
+
+	if (speed >= XFER_SW_DMA_0) {
+		id[ATA_ID_UDMA_MODES]  &= ~0xFF00;
+		id[ATA_ID_MWDMA_MODES] &= ~0x0700;
+		id[ATA_ID_SWDMA_MODES] &= ~0x0700;
+		if (ata_id_is_cfa(id))
+			id[ATA_ID_CFA_MODES] &= ~0x0E00;
+	} else	if (ata_id_is_cfa(id))
+		id[ATA_ID_CFA_MODES] &= ~0x01C0;
+
+ skip:
+#ifdef CONFIG_BLK_DEV_IDEDMA
+	if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
+		hwif->dma_ops->dma_host_set(drive, 1);
+	else if (hwif->dma_ops)	/* check if host supports DMA */
+		ide_dma_off_quietly(drive);
+#endif
+
+	if (speed >= XFER_UDMA_0) {
+		i = 1 << (speed - XFER_UDMA_0);
+		id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
+	} else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) {
+		i = speed - XFER_MW_DMA_2;
+		id[ATA_ID_CFA_MODES] |= i << 9;
+	} else if (speed >= XFER_MW_DMA_0) {
+		i = 1 << (speed - XFER_MW_DMA_0);
+		id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
+	} else if (speed >= XFER_SW_DMA_0) {
+		i = 1 << (speed - XFER_SW_DMA_0);
+		id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
+	} else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) {
+		i = speed - XFER_PIO_4;
+		id[ATA_ID_CFA_MODES] |= i << 6;
+	}
+
+	if (!drive->init_speed)
+		drive->init_speed = speed;
+	drive->current_speed = speed;
+	return error;
+}
+
+/*
+ * This should get invoked any time we exit the driver to
+ * wait for an interrupt response from a drive.  handler() points
+ * at the appropriate code to handle the next interrupt, and a
+ * timer is started to prevent us from waiting forever in case
+ * something goes wrong (see the ide_timer_expiry() handler later on).
+ *
+ * See also ide_execute_command
+ */
+void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
+		       unsigned int timeout)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	BUG_ON(hwif->handler);
+	hwif->handler		= handler;
+	hwif->timer.expires	= jiffies + timeout;
+	hwif->req_gen_timer	= hwif->req_gen;
+	add_timer(&hwif->timer);
+}
+
+void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
+		     unsigned int timeout)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned long flags;
+
+	spin_lock_irqsave(&hwif->lock, flags);
+	__ide_set_handler(drive, handler, timeout);
+	spin_unlock_irqrestore(&hwif->lock, flags);
+}
+EXPORT_SYMBOL(ide_set_handler);
+
+/**
+ *	ide_execute_command	-	execute an IDE command
+ *	@drive: IDE drive to issue the command against
+ *	@cmd: command
+ *	@handler: handler for next phase
+ *	@timeout: timeout for command
+ *
+ *	Helper function to issue an IDE command. This handles the
+ *	atomicity requirements, command timing and ensures that the
+ *	handler and IRQ setup do not race. All IDE command kick off
+ *	should go via this function or do equivalent locking.
+ */
+
+void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd,
+			 ide_handler_t *handler, unsigned timeout)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned long flags;
+
+	spin_lock_irqsave(&hwif->lock, flags);
+	if ((cmd->protocol != ATAPI_PROT_DMA &&
+	     cmd->protocol != ATAPI_PROT_PIO) ||
+	    (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT))
+		__ide_set_handler(drive, handler, timeout);
+	hwif->tp_ops->exec_command(hwif, cmd->tf.command);
+	/*
+	 * Drive takes 400nS to respond, we must avoid the IRQ being
+	 * serviced before that.
+	 *
+	 * FIXME: we could skip this delay with care on non shared devices
+	 */
+	ndelay(400);
+	spin_unlock_irqrestore(&hwif->lock, flags);
+}
+
+/*
+ * ide_wait_not_busy() waits for the currently selected device on the hwif
+ * to report a non-busy status, see comments in ide_probe_port().
+ */
+int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
+{
+	u8 stat = 0;
+
+	while (timeout--) {
+		/*
+		 * Turn this into a schedule() sleep once I'm sure
+		 * about locking issues (2.5 work ?).
+		 */
+		mdelay(1);
+		stat = hwif->tp_ops->read_status(hwif);
+		if ((stat & ATA_BUSY) == 0)
+			return 0;
+		/*
+		 * Assume a value of 0xff means nothing is connected to
+		 * the interface and it doesn't implement the pull-down
+		 * resistor on D7.
+		 */
+		if (stat == 0xff)
+			return -ENODEV;
+		touch_softlockup_watchdog();
+		touch_nmi_watchdog();
+	}
+	return -EBUSY;
+}