aboutsummaryrefslogtreecommitdiffstats
path: root/net/tipc/net.h
blob: de2b9ad8f646098921f54613ea7cfe11d2f6e144 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
/*
 * net/tipc/net.h: Include file for TIPC network routing code
 *
 * Copyright (c) 1995-2006, Ericsson AB
 * Copyright (c) 2005, Wind River Systems
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _TIPC_NET_H
#define _TIPC_NET_H

struct _zone;

/**
 * struct network - TIPC network structure
 * @zones: array of pointers to all zones within network
 */

struct network {
	struct _zone **zones;
};


extern struct network tipc_net;
extern rwlock_t tipc_net_lock;

void tipc_net_remove_as_router(u32 router);
void tipc_net_send_external_routes(u32 dest);
void tipc_net_route_msg(struct sk_buff *buf);
struct tipc_node *tipc_net_select_remote_node(u32 addr, u32 ref);
u32 tipc_net_select_router(u32 addr, u32 ref);

int tipc_net_start(u32 addr);
void tipc_net_stop(void);

#endif
a id='n385' href='#n385'>385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531
/*
 *  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(flags);
				*rstat = stat;
				return -EBUSY;
			}
		}
		local_irq_restore(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;
}