scripts/Makefile.asm-generic


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# include/asm-generic contains a lot of files that are used
# verbatim by several architectures.
#
# This Makefile reads the file arch/$(SRCARCH)/include/asm/Kbuild
# and for each file listed in this file with generic-y creates
# a small wrapper file in $(obj) (arch/$(SRCARCH)/include/generated/asm)

kbuild-file := $(srctree)/arch/$(SRCARCH)/include/asm/Kbuild
-include $(kbuild-file)

include scripts/Kbuild.include

# Create output directory if not already present
_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))

quiet_cmd_wrap = WRAP    $@
cmd_wrap = echo "\#include <asm-generic/$*.h>" >$@

all: $(patsubst %, $(obj)/%, $(generic-y))
	@:

$(obj)/%.h:
	$(call cmd,wrap)
/* 
 *  Parallel SCSI (SPI) transport specific attributes exported to sysfs.
 *
 *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
 *  Copyright (c) 2004, 2005 James Bottomley <James.Bottomley@SteelEye.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include <linux/blkdev.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <scsi/scsi.h>
#include "scsi_priv.h"
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_spi.h>

#define SPI_NUM_ATTRS 14	/* increase this if you add attributes */
#define SPI_OTHER_ATTRS 1	/* Increase this if you add "always
				 * on" attributes */
#define SPI_HOST_ATTRS	1

#define SPI_MAX_ECHO_BUFFER_SIZE	4096

#define DV_LOOPS	3
#define DV_TIMEOUT	(10*HZ)
#define DV_RETRIES	3	/* should only need at most 
				 * two cc/ua clears */

/* Our blacklist flags */
enum {
	SPI_BLIST_NOIUS = 0x1,
};

/* blacklist table, modelled on scsi_devinfo.c */
static struct {
	char *vendor;
	char *model;
	unsigned flags;
} spi_static_device_list[] __initdata = {
	{"HP", "Ultrium 3-SCSI", SPI_BLIST_NOIUS },
	{"IBM", "ULTRIUM-TD3", SPI_BLIST_NOIUS },
	{NULL, NULL, 0}
};

/* Private data accessors (keep these out of the header file) */
#define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress)
#define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex)

struct spi_internal {
	struct scsi_transport_template t;
	struct spi_function_template *f;
};

#define to_spi_internal(tmpl)	container_of(tmpl, struct spi_internal, t)

static const int ppr_to_ps[] = {
	/* The PPR values 0-6 are reserved, fill them in when
	 * the committee defines them */
	-1,			/* 0x00 */
	-1,			/* 0x01 */
	-1,			/* 0x02 */
	-1,			/* 0x03 */
	-1,			/* 0x04 */
	-1,			/* 0x05 */
	-1,			/* 0x06 */
	 3125,			/* 0x07 */
	 6250,			/* 0x08 */
	12500,			/* 0x09 */
	25000,			/* 0x0a */
	30300,			/* 0x0b */
	50000,			/* 0x0c */
};
/* The PPR values at which you calculate the period in ns by multiplying
 * by 4 */
#define SPI_STATIC_PPR	0x0c

static int sprint_frac(char *dest, int value, int denom)
{
	int frac = value % denom;
	int result = sprintf(dest, "%d", value / denom);

	if (frac == 0)
		return result;
	dest[result++] = '.';

	do {
		denom /= 10;
		sprintf(dest + result, "%d", frac / denom);
		result++;
		frac %= denom;
	} while (frac);

	dest[result++] = '\0';
	return result;
}

static int spi_execute(struct scsi_device *sdev, const void *cmd,
		       enum dma_data_direction dir,
		       void *buffer, unsigned bufflen,
		       struct scsi_sense_hdr *sshdr)
{
	int i, result;
	unsigned char sense[SCSI_SENSE_BUFFERSIZE];

	for(i = 0; i < DV_RETRIES; i++) {
		result = scsi_execute(sdev, cmd, dir, buffer, bufflen,
				      sense, DV_TIMEOUT, /* retries */ 1,
				      REQ_FAILFAST_DEV |
				      REQ_FAILFAST_TRANSPORT |
				      REQ_FAILFAST_DRIVER,
				      NULL);
		if (driver_byte(result) & DRIVER_SENSE) {
			struct scsi_sense_hdr sshdr_tmp;
			if (!sshdr)
				sshdr = &sshdr_tmp;

			if (scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE,
						 sshdr)
			    && sshdr->sense_key == UNIT_ATTENTION)
				continue;
		}
		break;
	}
	return result;
}

static struct {
	enum spi_signal_type	value;
	char			*name;
} signal_types[] = {
	{ SPI_SIGNAL_UNKNOWN, "unknown" },
	{ SPI_SIGNAL_SE, "SE" },
	{ SPI_SIGNAL_LVD, "LVD" },
	{ SPI_SIGNAL_HVD, "HVD" },
};

static inline const char *spi_signal_to_string(enum spi_signal_type type)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(signal_types); i++) {
		if (type == signal_types[i].value)
			return signal_types[i].name;
	}
	return NULL;
}
static inline enum spi_signal_type spi_signal_to_value(const char *name)
{
	int i, len;

	for (i = 0; i < ARRAY_SIZE(signal_types); i++) {
		len =  strlen(signal_types[i].name);
		if (strncmp(name, signal_types[i].name, len) == 0 &&
		    (name[len] == '\n' || name[len] == '\0'))
			return signal_types[i].value;
	}
	return SPI_SIGNAL_UNKNOWN;
}

static int spi_host_setup(struct transport_container *tc, struct device *dev,
			  struct device *cdev)
{
	struct Scsi_Host *shost = dev_to_shost(dev);

	spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;

	return 0;
}

static int spi_host_configure(struct transport_container *tc,
			      struct device *dev,
			      struct device *cdev);

static DECLARE_TRANSPORT_CLASS(spi_host_class,
			       "spi_host",
			       spi_host_setup,
			       NULL,
			       spi_host_configure);