drivers/scsi/aic7xxx/aic7xxx_proc.c - linux/kernel/git/mellanox/linux - Git at Google

 /*
  * Copyright (c) 2000-2001 Adaptec Inc.
  * 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,
  *    without modification.
  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  *    substantially similar to the "NO WARRANTY" disclaimer below
  *    ("Disclaimer") and any redistribution must be conditioned upon
  *    including a substantially similar Disclaimer requirement for further
  *    binary redistribution.
  * 3. Neither the names of the above-listed copyright holders nor the names
  *    of any 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.
  *
  * NO WARRANTY
  * 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 MERCHANTIBILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
  *
  * String handling code courtesy of Gerard Roudier's <groudier@club-internet.fr>
  * sym driver.
  *
  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_proc.c#29 $
  */
 #include "aic7xxx_osm.h"
 #include "aic7xxx_inline.h"
 #include "aic7xxx_93cx6.h"

 static void	copy_mem_info(struct info_str *info, char *data, int len);
 static int	copy_info(struct info_str *info, char *fmt, ...);
 static void	ahc_dump_target_state(struct ahc_softc *ahc,
 				      struct info_str *info,
 				      u_int our_id, char channel,
 				      u_int target_id, u_int target_offset);
 static void	ahc_dump_device_state(struct info_str *info,
 				      struct scsi_device *dev);
 static int	ahc_proc_write_seeprom(struct ahc_softc *ahc,
 				       char *buffer, int length);

 /*
  * Table of syncrates that don't follow the "divisible by 4"
  * rule. This table will be expanded in future SCSI specs.
  */
 static struct {
 	u_int period_factor;
 	u_int period;	/* in 100ths of ns */
 } scsi_syncrates[] = {
 	{ 0x08, 625 },	/* FAST-160 */
 	{ 0x09, 1250 },	/* FAST-80 */
 	{ 0x0a, 2500 },	/* FAST-40 40MHz */
 	{ 0x0b, 3030 },	/* FAST-40 33MHz */
 	{ 0x0c, 5000 }	/* FAST-20 */
 };

 /*
  * Return the frequency in kHz corresponding to the given
  * sync period factor.
  */
 static u_int
 ahc_calc_syncsrate(u_int period_factor)
 {
 	int i;

 	/* See if the period is in the "exception" table */
 	for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {

 		if (period_factor == scsi_syncrates[i].period_factor) {
 			/* Period in kHz */
 			return (100000000 / scsi_syncrates[i].period);
 		}
 	}

 	/*
 	 * Wasn't in the table, so use the standard
 	 * 4 times conversion.
 	 */
 	return (10000000 / (period_factor * 4 * 10));
 }


 static void
 copy_mem_info(struct info_str *info, char *data, int len)
 {
 	if (info->pos + len > info->offset + info->length)
 		len = info->offset + info->length - info->pos;

 	if (info->pos + len < info->offset) {
 		info->pos += len;
 		return;
 	}

 	if (info->pos < info->offset) {
 		off_t partial;

 		partial = info->offset - info->pos;
 		data += partial;
 		info->pos += partial;
 		len  -= partial;
 	}

 	if (len > 0) {
 		memcpy(info->buffer, data, len);
 		info->pos += len;
 		info->buffer += len;
 	}
 }

 static int
 copy_info(struct info_str *info, char *fmt, ...)
 {
 	va_list args;
 	char buf[256];
 	int len;

 	va_start(args, fmt);
 	len = vsprintf(buf, fmt, args);
 	va_end(args);

 	copy_mem_info(info, buf, len);
 	return (len);
 }

 void
 ahc_format_transinfo(struct info_str *info, struct ahc_transinfo *tinfo)
 {
 	u_int speed;
 	u_int freq;
 	u_int mb;

         speed = 3300;
         freq = 0;
 	if (tinfo->offset != 0) {
 		freq = ahc_calc_syncsrate(tinfo->period);
 		speed = freq;
 	}
 	speed *= (0x01 << tinfo->width);
         mb = speed / 1000;
         if (mb > 0)
 		copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
         else
 		copy_info(info, "%dKB/s transfers", speed);

 	if (freq != 0) {
 		copy_info(info, " (%d.%03dMHz%s, offset %d",
 			 freq / 1000, freq % 1000,
 			 (tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
 			 ? " DT" : "", tinfo->offset);
 	}

 	if (tinfo->width > 0) {
 		if (freq != 0) {
 			copy_info(info, ", ");
 		} else {
 			copy_info(info, " (");
 		}
 		copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
 	} else if (freq != 0) {
 		copy_info(info, ")");
 	}
 	copy_info(info, "\n");
 }

 static void
 ahc_dump_target_state(struct ahc_softc *ahc, struct info_str *info,
 		      u_int our_id, char channel, u_int target_id,
 		      u_int target_offset)
 {
 	struct	scsi_target *starget;
 	struct	ahc_initiator_tinfo *tinfo;
 	struct	ahc_tmode_tstate *tstate;
 	int	lun;

 	tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
 				    target_id, &tstate);
 	if ((ahc->features & AHC_TWIN) != 0)
 		copy_info(info, "Channel %c ", channel);
 	copy_info(info, "Target %d Negotiation Settings\n", target_id);
 	copy_info(info, "\tUser: ");
 	ahc_format_transinfo(info, &tinfo->user);
 	starget = ahc->platform_data->starget[target_offset];
 	if (!starget)
 		return;

 	copy_info(info, "\tGoal: ");
 	ahc_format_transinfo(info, &tinfo->goal);
 	copy_info(info, "\tCurr: ");
 	ahc_format_transinfo(info, &tinfo->curr);

 	for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
 		struct scsi_device *sdev;

 		sdev = scsi_device_lookup_by_target(starget, lun);

 		if (sdev == NULL)
 			continue;

 		ahc_dump_device_state(info, sdev);
 	}
 }

 static void
 ahc_dump_device_state(struct info_str *info, struct scsi_device *sdev)
 {
 	struct ahc_linux_device *dev = scsi_transport_device_data(sdev);

 	copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
 		  sdev->sdev_target->channel + 'A',
 		  sdev->sdev_target->id, sdev->lun);

 	copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
 	copy_info(info, "\t\tCommands Active %d\n", dev->active);
 	copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
 	copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
 	copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
 }

 static int
 ahc_proc_write_seeprom(struct ahc_softc *ahc, char *buffer, int length)
 {
 	struct seeprom_descriptor sd;
 	int have_seeprom;
 	u_long s;
 	int paused;
 	int written;

 	/* Default to failure. */
 	written = -EINVAL;
 	ahc_lock(ahc, &s);
 	paused = ahc_is_paused(ahc);
 	if (!paused)
 		ahc_pause(ahc);

 	if (length != sizeof(struct seeprom_config)) {
 		printf("ahc_proc_write_seeprom: incorrect buffer size\n");
 		goto done;
 	}

 	have_seeprom = ahc_verify_cksum((struct seeprom_config*)buffer);
 	if (have_seeprom == 0) {
 		printf("ahc_proc_write_seeprom: cksum verification failed\n");
 		goto done;
 	}

 	sd.sd_ahc = ahc;
 #if AHC_PCI_CONFIG > 0
 	if ((ahc->chip & AHC_PCI) != 0) {
 		sd.sd_control_offset = SEECTL;
 		sd.sd_status_offset = SEECTL;
 		sd.sd_dataout_offset = SEECTL;
 		if (ahc->flags & AHC_LARGE_SEEPROM)
 			sd.sd_chip = C56_66;
 		else
 			sd.sd_chip = C46;
 		sd.sd_MS = SEEMS;
 		sd.sd_RDY = SEERDY;
 		sd.sd_CS = SEECS;
 		sd.sd_CK = SEECK;
 		sd.sd_DO = SEEDO;
 		sd.sd_DI = SEEDI;
 		have_seeprom = ahc_acquire_seeprom(ahc, &sd);
 	} else
 #endif
 	if ((ahc->chip & AHC_VL) != 0) {
 		sd.sd_control_offset = SEECTL_2840;
 		sd.sd_status_offset = STATUS_2840;
 		sd.sd_dataout_offset = STATUS_2840;
 		sd.sd_chip = C46;
 		sd.sd_MS = 0;
 		sd.sd_RDY = EEPROM_TF;
 		sd.sd_CS = CS_2840;
 		sd.sd_CK = CK_2840;
 		sd.sd_DO = DO_2840;
 		sd.sd_DI = DI_2840;
 		have_seeprom = TRUE;
 	} else {
 		printf("ahc_proc_write_seeprom: unsupported adapter type\n");
 		goto done;
 	}

 	if (!have_seeprom) {
 		printf("ahc_proc_write_seeprom: No Serial EEPROM\n");
 		goto done;
 	} else {
 		u_int start_addr;

 		if (ahc->seep_config == NULL) {
 			ahc->seep_config = malloc(sizeof(*ahc->seep_config),
 						  M_DEVBUF, M_NOWAIT);
 			if (ahc->seep_config == NULL) {
 				printf("aic7xxx: Unable to allocate serial "
 				       "eeprom buffer.  Write failing\n");
 				goto done;
 			}
 		}
 		printf("aic7xxx: Writing Serial EEPROM\n");
 		start_addr = 32 * (ahc->channel - 'A');
 		ahc_write_seeprom(&sd, (u_int16_t *)buffer, start_addr,
 				  sizeof(struct seeprom_config)/2);
 		ahc_read_seeprom(&sd, (uint16_t *)ahc->seep_config,
 				 start_addr, sizeof(struct seeprom_config)/2);
 #if AHC_PCI_CONFIG > 0
 		if ((ahc->chip & AHC_VL) == 0)
 			ahc_release_seeprom(&sd);
 #endif
 		written = length;
 	}

 done:
 	if (!paused)
 		ahc_unpause(ahc);
 	ahc_unlock(ahc, &s);
 	return (written);
 }

 /*
  * Return information to handle /proc support for the driver.
  */
 int
 ahc_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
 		    off_t offset, int length, int inout)
 {
 	struct	ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
 	struct	info_str info;
 	char	ahc_info[256];
 	u_int	max_targ;
 	u_int	i;
 	int	retval;

 	 /* Has data been written to the file? */
 	if (inout == TRUE) {
 		retval = ahc_proc_write_seeprom(ahc, buffer, length);
 		goto done;
 	}

 	if (start)
 		*start = buffer;

 	info.buffer	= buffer;
 	info.length	= length;
 	info.offset	= offset;
 	info.pos	= 0;

 	copy_info(&info, "Adaptec AIC7xxx driver version: %s\n",
 		  AIC7XXX_DRIVER_VERSION);
 	copy_info(&info, "%s\n", ahc->description);
 	ahc_controller_info(ahc, ahc_info);
 	copy_info(&info, "%s\n", ahc_info);
 	copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
 		  ahc->scb_data->numscbs, AHC_NSEG);


 	if (ahc->seep_config == NULL)
 		copy_info(&info, "No Serial EEPROM\n");
 	else {
 		copy_info(&info, "Serial EEPROM:\n");
 		for (i = 0; i < sizeof(*ahc->seep_config)/2; i++) {
 			if (((i % 8) == 0) && (i != 0)) {
 				copy_info(&info, "\n");
 			}
 			copy_info(&info, "0x%.4x ",
 				  ((uint16_t*)ahc->seep_config)[i]);
 		}
 		copy_info(&info, "\n");
 	}
 	copy_info(&info, "\n");

 	max_targ = 16;
 	if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
 		max_targ = 8;

 	for (i = 0; i < max_targ; i++) {
 		u_int our_id;
 		u_int target_id;
 		char channel;

 		channel = 'A';
 		our_id = ahc->our_id;
 		target_id = i;
 		if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
 			channel = 'B';
 			our_id = ahc->our_id_b;
 			target_id = i % 8;
 		}

 		ahc_dump_target_state(ahc, &info, our_id,
 				      channel, target_id, i);
 	}
 	retval = info.pos > info.offset ? info.pos - info.offset : 0;
 done:
 	return (retval);
 }
	/*
	* Copyright (c) 2000-2001 Adaptec Inc.
	* 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,
	* without modification.
	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	* substantially similar to the "NO WARRANTY" disclaimer below
	* ("Disclaimer") and any redistribution must be conditioned upon
	* including a substantially similar Disclaimer requirement for further
	* binary redistribution.
	* 3. Neither the names of the above-listed copyright holders nor the names
	* of any 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.
	*
	* NO WARRANTY
	* 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 MERCHANTIBILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
	*
	* String handling code courtesy of Gerard Roudier's <groudier@club-internet.fr>
	* sym driver.
	*
	* $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_proc.c#29 $
	*/
	#include "aic7xxx_osm.h"
	#include "aic7xxx_inline.h"
	#include "aic7xxx_93cx6.h"

	static void copy_mem_info(struct info_str info, char data, int len);
	static int copy_info(struct info_str info, char fmt, ...);
	static void ahc_dump_target_state(struct ahc_softc *ahc,
	struct info_str *info,
	u_int our_id, char channel,
	u_int target_id, u_int target_offset);
	static void ahc_dump_device_state(struct info_str *info,
	struct scsi_device *dev);
	static int ahc_proc_write_seeprom(struct ahc_softc *ahc,
	char *buffer, int length);

	/*
	* Table of syncrates that don't follow the "divisible by 4"
	* rule. This table will be expanded in future SCSI specs.
	*/
	static struct {
	u_int period_factor;
	u_int period; /* in 100ths of ns */
	} scsi_syncrates[] = {
	{ 0x08, 625 }, /* FAST-160 */
	{ 0x09, 1250 }, /* FAST-80 */
	{ 0x0a, 2500 }, /* FAST-40 40MHz */
	{ 0x0b, 3030 }, /* FAST-40 33MHz */
	{ 0x0c, 5000 } /* FAST-20 */
	};

	/*
	* Return the frequency in kHz corresponding to the given
	* sync period factor.
	*/
	static u_int
	ahc_calc_syncsrate(u_int period_factor)
	{
	int i;

	/* See if the period is in the "exception" table */
	for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {

	if (period_factor == scsi_syncrates[i].period_factor) {
	/* Period in kHz */
	return (100000000 / scsi_syncrates[i].period);
	}
	}

	/*
	* Wasn't in the table, so use the standard
	* 4 times conversion.
	*/
	return (10000000 / (period_factor * 4 * 10));
	}


	static void
	copy_mem_info(struct info_str info, char data, int len)
	{
	if (info->pos + len > info->offset + info->length)
	len = info->offset + info->length - info->pos;

	if (info->pos + len < info->offset) {
	info->pos += len;
	return;
	}

	if (info->pos < info->offset) {
	off_t partial;

	partial = info->offset - info->pos;
	data += partial;
	info->pos += partial;
	len -= partial;
	}

	if (len > 0) {
	memcpy(info->buffer, data, len);
	info->pos += len;
	info->buffer += len;
	}
	}

	static int
	copy_info(struct info_str info, char fmt, ...)
	{
	va_list args;
	char buf[256];
	int len;

	va_start(args, fmt);
	len = vsprintf(buf, fmt, args);
	va_end(args);

	copy_mem_info(info, buf, len);
	return (len);
	}

	void
	ahc_format_transinfo(struct info_str info, struct ahc_transinfo tinfo)
	{
	u_int speed;
	u_int freq;
	u_int mb;

	speed = 3300;
	freq = 0;
	if (tinfo->offset != 0) {
	freq = ahc_calc_syncsrate(tinfo->period);
	speed = freq;
	}
	speed *= (0x01 << tinfo->width);
	mb = speed / 1000;
	if (mb > 0)
	copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
	else
	copy_info(info, "%dKB/s transfers", speed);

	if (freq != 0) {
	copy_info(info, " (%d.%03dMHz%s, offset %d",
	freq / 1000, freq % 1000,
	(tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
	? " DT" : "", tinfo->offset);
	}

	if (tinfo->width > 0) {
	if (freq != 0) {
	copy_info(info, ", ");
	} else {
	copy_info(info, " (");
	}
	copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
	} else if (freq != 0) {
	copy_info(info, ")");
	}
	copy_info(info, "\n");
	}

	static void
	ahc_dump_target_state(struct ahc_softc ahc, struct info_str info,
	u_int our_id, char channel, u_int target_id,
	u_int target_offset)
	{
	struct scsi_target *starget;
	struct ahc_initiator_tinfo *tinfo;
	struct ahc_tmode_tstate *tstate;
	int lun;

	tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
	target_id, &tstate);
	if ((ahc->features & AHC_TWIN) != 0)
	copy_info(info, "Channel %c ", channel);
	copy_info(info, "Target %d Negotiation Settings\n", target_id);
	copy_info(info, "\tUser: ");
	ahc_format_transinfo(info, &tinfo->user);
	starget = ahc->platform_data->starget[target_offset];
	if (!starget)
	return;

	copy_info(info, "\tGoal: ");
	ahc_format_transinfo(info, &tinfo->goal);
	copy_info(info, "\tCurr: ");
	ahc_format_transinfo(info, &tinfo->curr);

	for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
	struct scsi_device *sdev;

	sdev = scsi_device_lookup_by_target(starget, lun);

	if (sdev == NULL)
	continue;

	ahc_dump_device_state(info, sdev);
	}
	}

	static void
	ahc_dump_device_state(struct info_str info, struct scsi_device sdev)
	{
	struct ahc_linux_device *dev = scsi_transport_device_data(sdev);

	copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
	sdev->sdev_target->channel + 'A',
	sdev->sdev_target->id, sdev->lun);

	copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
	copy_info(info, "\t\tCommands Active %d\n", dev->active);
	copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
	copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
	copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
	}

	static int
	ahc_proc_write_seeprom(struct ahc_softc ahc, char buffer, int length)
	{
	struct seeprom_descriptor sd;
	int have_seeprom;
	u_long s;
	int paused;
	int written;

	/* Default to failure. */
	written = -EINVAL;
	ahc_lock(ahc, &s);
	paused = ahc_is_paused(ahc);
	if (!paused)
	ahc_pause(ahc);

	if (length != sizeof(struct seeprom_config)) {
	printf("ahc_proc_write_seeprom: incorrect buffer size\n");
	goto done;
	}

	have_seeprom = ahc_verify_cksum((struct seeprom_config*)buffer);
	if (have_seeprom == 0) {
	printf("ahc_proc_write_seeprom: cksum verification failed\n");
	goto done;
	}

	sd.sd_ahc = ahc;
	#if AHC_PCI_CONFIG > 0
	if ((ahc->chip & AHC_PCI) != 0) {
	sd.sd_control_offset = SEECTL;
	sd.sd_status_offset = SEECTL;
	sd.sd_dataout_offset = SEECTL;
	if (ahc->flags & AHC_LARGE_SEEPROM)
	sd.sd_chip = C56_66;
	else
	sd.sd_chip = C46;
	sd.sd_MS = SEEMS;
	sd.sd_RDY = SEERDY;
	sd.sd_CS = SEECS;
	sd.sd_CK = SEECK;
	sd.sd_DO = SEEDO;
	sd.sd_DI = SEEDI;
	have_seeprom = ahc_acquire_seeprom(ahc, &sd);
	} else
	#endif
	if ((ahc->chip & AHC_VL) != 0) {
	sd.sd_control_offset = SEECTL_2840;
	sd.sd_status_offset = STATUS_2840;
	sd.sd_dataout_offset = STATUS_2840;
	sd.sd_chip = C46;
	sd.sd_MS = 0;
	sd.sd_RDY = EEPROM_TF;
	sd.sd_CS = CS_2840;
	sd.sd_CK = CK_2840;
	sd.sd_DO = DO_2840;
	sd.sd_DI = DI_2840;
	have_seeprom = TRUE;
	} else {
	printf("ahc_proc_write_seeprom: unsupported adapter type\n");
	goto done;
	}

	if (!have_seeprom) {
	printf("ahc_proc_write_seeprom: No Serial EEPROM\n");
	goto done;
	} else {
	u_int start_addr;

	if (ahc->seep_config == NULL) {
	ahc->seep_config = malloc(sizeof(*ahc->seep_config),
	M_DEVBUF, M_NOWAIT);
	if (ahc->seep_config == NULL) {
	printf("aic7xxx: Unable to allocate serial "
	"eeprom buffer. Write failing\n");
	goto done;
	}
	}
	printf("aic7xxx: Writing Serial EEPROM\n");
	start_addr = 32 * (ahc->channel - 'A');
	ahc_write_seeprom(&sd, (u_int16_t *)buffer, start_addr,
	sizeof(struct seeprom_config)/2);
	ahc_read_seeprom(&sd, (uint16_t *)ahc->seep_config,
	start_addr, sizeof(struct seeprom_config)/2);
	#if AHC_PCI_CONFIG > 0
	if ((ahc->chip & AHC_VL) == 0)
	ahc_release_seeprom(&sd);
	#endif
	written = length;
	}

	done:
	if (!paused)
	ahc_unpause(ahc);
	ahc_unlock(ahc, &s);
	return (written);
	}

	/*
	* Return information to handle /proc support for the driver.
	*/
	int
	ahc_linux_proc_info(struct Scsi_Host shost, char buffer, char **start,
	off_t offset, int length, int inout)
	{
	struct ahc_softc ahc = (struct ahc_softc **)shost->hostdata;
	struct info_str info;
	char ahc_info[256];
	u_int max_targ;
	u_int i;
	int retval;

	/* Has data been written to the file? */
	if (inout == TRUE) {
	retval = ahc_proc_write_seeprom(ahc, buffer, length);
	goto done;
	}

	if (start)
	*start = buffer;

	info.buffer = buffer;
	info.length = length;
	info.offset = offset;
	info.pos = 0;

	copy_info(&info, "Adaptec AIC7xxx driver version: %s\n",
	AIC7XXX_DRIVER_VERSION);
	copy_info(&info, "%s\n", ahc->description);
	ahc_controller_info(ahc, ahc_info);
	copy_info(&info, "%s\n", ahc_info);
	copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
	ahc->scb_data->numscbs, AHC_NSEG);


	if (ahc->seep_config == NULL)
	copy_info(&info, "No Serial EEPROM\n");
	else {
	copy_info(&info, "Serial EEPROM:\n");
	for (i = 0; i < sizeof(*ahc->seep_config)/2; i++) {
	if (((i % 8) == 0) && (i != 0)) {
	copy_info(&info, "\n");
	}
	copy_info(&info, "0x%.4x ",
	((uint16_t*)ahc->seep_config)[i]);
	}
	copy_info(&info, "\n");
	}
	copy_info(&info, "\n");

	max_targ = 16;
	if ((ahc->features & (AHC_WIDE\|AHC_TWIN)) == 0)
	max_targ = 8;

	for (i = 0; i < max_targ; i++) {
	u_int our_id;
	u_int target_id;
	char channel;

	channel = 'A';
	our_id = ahc->our_id;
	target_id = i;
	if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
	channel = 'B';
	our_id = ahc->our_id_b;
	target_id = i % 8;
	}

	ahc_dump_target_state(ahc, &info, our_id,
	channel, target_id, i);
	}
	retval = info.pos > info.offset ? info.pos - info.offset : 0;
	done:
	return (retval);
	}