File:  [DragonFly] / src / sys / dev / raid / dpt / dpt_control.c
Revision 1.7: download - view: text, annotated - select for diffs
Wed May 19 22:52:47 2004 UTC (10 years, 2 months ago) by dillon
Branches: MAIN
CVS tags: HEAD, DragonFly_Stable, DragonFly_Snap29Sep2004, DragonFly_Snap13Sep2004, DragonFly_RELEASE_1_2_Slip, DragonFly_RELEASE_1_2, DragonFly_1_0_REL, DragonFly_1_0_RC1, DragonFly_1_0A_REL
Device layer rollup commit.

* cdevsw_add() is now required.  cdevsw_add() and cdevsw_remove() may specify
  a mask/match indicating the range of supported minor numbers.  Multiple
  cdevsw_add()'s using the same major number, but distinctly different
  ranges, may be issued.  All devices that failed to call cdevsw_add() before
  now do.

* cdevsw_remove() now automatically marks all devices within its supported
  range as being destroyed.

* vnode->v_rdev is no longer resolved when the vnode is created.  Instead,
  only v_udev (a newly added field) is resolved.  v_rdev is resolved when
  the vnode is opened and cleared on the last close.

* A great deal of code was making rather dubious assumptions with regards
  to the validity of devices associated with vnodes, primarily due to
  the persistence of a device structure due to being indexed by (major, minor)
  instead of by (cdevsw, major, minor).  In particular, if you run a program
  which connects to a USB device and then you pull the USB device and plug
  it back in, the vnode subsystem will continue to believe that the device
  is open when, in fact, it isn't (because it was destroyed and recreated).

  In particular, note that all the VFS mount procedures now check devices
  via v_udev instead of v_rdev prior to calling VOP_OPEN(), since v_rdev
  is NULL prior to the first open.

* The disk layer's device interaction has been rewritten.  The disk layer
  (i.e. the slice and disklabel management layer) no longer overloads
  its data onto the device structure representing the underlying physical
  disk.  Instead, the disk layer uses the new cdevsw_add() functionality
  to register its own cdevsw using the underlying device's major number,
  and simply does NOT register the underlying device's cdevsw.  No
  confusion is created because the device hash is now based on
  (cdevsw,major,minor) rather then (major,minor).

  NOTE: This also means that underlying raw disk devices may use the entire
  device minor number instead of having to reserve the bits used by the disk
  layer, and also means that can we (theoretically) stack a fully
  disklabel-supported 'disk' on top of any block device.

* The new reference counting scheme prevents this by associating a device
  with a cdevsw and disconnecting the device from its cdevsw when the cdevsw
  is removed.  Additionally, all udev2dev() lookups run through the cdevsw
  mask/match and only successfully find devices still associated with an
  active cdevsw.

* Major work on MFS:  MFS no longer shortcuts vnode and device creation.  It
  now creates a real vnode and a real device and implements real open and
  close VOPs.  Additionally, due to the disk layer changes, MFS is no longer
  limited to 255 mounts.  The new limit is 16 million.  Since MFS creates a
  real device node, mount_mfs will now create a real /dev/mfs<PID> device
  that can be read from userland (e.g. so you can dump an MFS filesystem).

* BUF AND DEVICE STRATEGY changes.  The struct buf contains a b_dev field.
  In order to properly handle stacked devices we now require that the b_dev
  field be initialized before the device strategy routine is called.  This
  required some additional work in various VFS implementations.  To enforce
  this requirement, biodone() now sets b_dev to NODEV.  The new disk layer
  will adjust b_dev before forwarding a request to the actual physical
  device.

* A bug in the ISO CD boot sequence which resulted in a panic has been fixed.

Testing by: lots of people, but David Rhodus found the most aggregious bugs.

/**
 *       Copyright (c) 1997 by Simon Shapiro
 *       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, immediately at the beginning of the file.
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 */

/**
 * dpt_control.c: Control Functions and /dev entry points for /dev/dpt*
 *
 * Caveat Emptor!	This is work in progress.	The interfaces and
 * functionality of this code will change (possibly radically) in the
 * future.
 */

#ident "$FreeBSD: src/sys/dev/dpt/dpt_control.c,v 1.16 1999/09/25 18:23:48 phk Exp $"
#ident "$DragonFly: src/sys/dev/raid/dpt/dpt_control.c,v 1.7 2004/05/19 22:52:47 dillon Exp $"

#include "opt_dpt.h"

#include <i386/include/cputypes.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/conf.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/vm_extern.h>
#include <vm/pmap.h>
#include <scsi/scsiconf.h>

#include "dpt.h"

#define INLINE __inline

extern char     osrelease[];

enum dpt_message dpt_message;
enum dpt_immediate_cmd dpt_immediate_cmd;

static dpt_sysinfo_t   dpt_sysinfo;

/* Entry points and other prototypes */
static vm_offset_t dpt_physmap(u_int32_t paddr, vm_size_t size);
static void     dpt_unphysmap(u_int8_t * vaddr, vm_size_t size);

static void     dpt_get_sysinfo(void);

static int      dpt_open(dev_t dev, int flags, int fmt, struct proc * p);
static int      dpt_close(dev_t dev, int flags, int fmt, struct proc * p);
static int      dpt_write(dev_t dev, struct uio * uio, int ioflag);
static int      dpt_read(dev_t dev, struct uio * uio, int ioflag);
static int      dpt_ioctl(dev_t dev, u_long cmd, caddr_t cmdarg, int flags, struct proc * p);


/* This has to be modified as the processor and CPU are not known yet */
static dpt_sig_t dpt_sig = {
	'd', 'P', 't', 'S', 'i', 'G',
	SIG_VERSION, PROC_INTEL, PROC_386,
	FT_HBADRVR, FTF_PROTECTED,
	OEM_DPT, OS_FREEBSD,
	CAP_PASS | CAP_OVERLAP | CAP_RAID0 | CAP_RAID1 | CAP_RAID5 | CAP_ASPI,
	DEV_ALL, ADF_SC4_PCI | ADF_SC3_PCI, 0, 0,
	DPT_RELEASE, DPT_VERSION, DPT_PATCH,
	DPT_MONTH, DPT_DAY, DPT_YEAR,
	"DPT FreeBSD Driver (c) 1997 Simon Shapiro"
};

#define CDEV_MAJOR	    DPT_CDEV_MAJOR

/* Normally, this is a static structure.  But we need it in pci/dpt_pci.c */
static struct cdevsw dpt_cdevsw = {
	/* name */	"dpt",
	/* maj */	CDEV_MAJOR,
	/* flags */	0,
	/* port */      NULL,
	/* clone */	NULL,

	/* open */	dpt_open,
	/* close */	dpt_close,
	/* read */	dpt_read,
	/* write */	dpt_write,
	/* ioctl */	dpt_ioctl,
	/* poll */	nopoll,
	/* mmap */	nommap,
	/* strategy */	nostrategy,
	/* dump */	nodump,
	/* psize */	nopsize
};

static struct buf *dpt_inbuf[DPT_MAX_ADAPTERS];
static char     dpt_rw_command[DPT_MAX_ADAPTERS][DPT_RW_CMD_LEN + 1];


/*
 * Given a minor device number,
 * return the pointer to its softc structure
 */

dpt_softc_t *
dpt_minor2softc(int minor_no)
{
	dpt_softc_t    *dpt;

	if (dpt_minor2unit(minor_no & ~SCSI_CONTROL_MASK) == -1)
		return (NULL);

	for (dpt = TAILQ_FIRST(&dpt_softc_list);
	     (dpt != NULL) && (dpt->unit != (minor_no & ~SCSI_CONTROL_MASK));
	     dpt = TAILQ_NEXT(dpt, links));

	return (dpt);
}

/**
 * Map a physical address to virtual one.
 * This is a first cut, experimental thing
 *
 * Paddr is the physical address to map
 * size is the size of the region, in bytes.
 * Because of alignment problems, we actually round up the size requested to
 * the next page count.
 */

static          vm_offset_t
dpt_physmap(u_int32_t req_paddr, vm_size_t req_size)
{
	vm_offset_t     va;
	int             ndx;
	vm_size_t       size;
	u_int32_t       paddr;
	u_int32_t       offset;



	size = (req_size / PAGE_SIZE + 1) * PAGE_SIZE;
	paddr = req_paddr & 0xfffff000;
	offset = req_paddr - paddr;

	va = kmem_alloc_pageable(kernel_map, size);
	if (va == (vm_offset_t) 0)
		return (va);

	for (ndx = 0; ndx < size; ndx += PAGE_SIZE) {
		pmap_kenter(va + ndx, paddr + ndx);
		invltlb();
	}

	return (va + offset);
}


/*
 * Release virtual space allocated by physmap We ASSUME that the correct
 * start address and the correct LENGTH are given.
 * 
 * Disaster will follow if these assumptions are false!
 */

static void
dpt_unphysmap(u_int8_t * vaddr, vm_size_t size)
{
	int             ndx;

	for (ndx = 0; ndx < size; ndx += PAGE_SIZE) {
		pmap_kremove((vm_offset_t) vaddr + ndx);
	}

	kmem_free(kernel_map, (vm_offset_t) vaddr, size);
}

/**
 * Collect interesting system information
 * The following is one of the worst hacks I have ever allowed my
 * name to be associated with.
 * There MUST be a system structure that provides this data.
 */

static void
dpt_get_sysinfo(void)
{
	int             i;
	int             j;
	int             ospl;
	char           *addr;

	bzero(&dpt_sysinfo, sizeof(dpt_sysinfo_t));

	/**
         * This is really silly, but we better run this in splhigh as we
         * have no clue what we bump into.
         * Let's hope anyone else who does this sort of things protects them
         * with splhigh too.
         */
	ospl = splhigh();

	switch (cpu_class) {
	case CPUCLASS_386:
		dpt_sig.Processor = dpt_sysinfo.processorType = PROC_386;
		break;
	case CPUCLASS_486:
		dpt_sig.Processor = dpt_sysinfo.processorType = PROC_486;
		break;
	case CPUCLASS_586:
		dpt_sig.Processor = dpt_sysinfo.processorType = PROC_PENTIUM;
		break;
	case CPUCLASS_686:
		dpt_sig.Processor = dpt_sysinfo.processorType = PROC_P6;
		break;
	default:
		dpt_sig.Processor = dpt_sysinfo.flags &= ~SI_ProcessorValid;
		break;
	}

	/* Get The First Drive Type From CMOS */
	outb(0x70, 0x12);
	i = inb(0x71);
	j = i >> 4;

	if (i == 0x0f) {
		outb(0x70, 0x19);
		j = inb(0x71);
	}
	dpt_sysinfo.drive0CMOS = j;

	/* Get The Second Drive Type From CMOS */
	j = i & 0x0f;
	if (i == 0x0f) {
		outb(0x70, 0x1a);
		j = inb(0x71);
	}
	dpt_sysinfo.drive1CMOS = j;

	/* Get The Number Of Drives From The Bios Data Area */
	if ((addr = (char *) dpt_physmap(0x0475, 1024)) == NULL) {
		printf("DPT:  Cannot map BIOS address 0x0475.  No sysinfo... :-(\n");
		return;
	}
	dpt_sysinfo.numDrives = *addr;
	dpt_unphysmap(addr, 1024);

	/* Get the processor fields from the SIG structure, and set the flags */
	dpt_sysinfo.processorFamily = dpt_sig.ProcessorFamily;
	dpt_sysinfo.flags = SI_CMOS_Valid | SI_NumDrivesValid;

	/* Go out and look for SmartROM */
	for (i = 0; i < 3; ++i) {
		switch (i) {
		case 0:
			addr = (char *) dpt_physmap(0xC8000, 1024);
		case 1:
			addr = (char *) dpt_physmap(0xD8000, 1024);
		default:
			addr = (char *) dpt_physmap(0xDC000, 1024);
		}

		if (addr == NULL)
			continue;

		if (*((u_int16_t *) addr) == 0xaa55) {
			if ((*((u_int32_t *) (addr + 6)) == 0x00202053)
			  && (*((u_int32_t *) (addr + 10)) == 0x00545044)) {
				break;
			}
		}
		dpt_unphysmap(addr, 1024);
		addr = NULL;
	}

	/**
         * If i < 3, we founday it so set up a pointer to the starting
         * version digit by searching for it.
         */
	if (addr != NULL) {
		addr += 0x15;
		for (i = 0; i < 64; ++i)
			if ((addr[i] == ' ') && (addr[i + 1] == 'v'))
				break;
		if (i < 64) {
			addr += (i + 4);
		} else {
			dpt_unphysmap(addr, 1024);
			addr = NULL;
		}
	}
	/* If all is well, set up the SmartROM version fields */
	if (addr != NULL) {
		dpt_sysinfo.smartROMMajorVersion = *addr - '0';	/* Assumes ASCII */
		dpt_sysinfo.smartROMMinorVersion = *(addr + 2);
		dpt_sysinfo.smartROMRevision = *(addr + 3);
		dpt_sysinfo.flags |= SI_SmartROMverValid;
	} else {
		dpt_sysinfo.flags |= SI_NO_SmartROM;
	}

	/* Get the conventional memory size from CMOS */
	outb(0x70, 0x16);
	j = inb(0x71);
	j <<= 8;
	outb(0x70, 0x15);
	j |= inb(0x71);
	dpt_sysinfo.conventionalMemSize = j;

	/**
         * Get the extended memory found at power on from CMOS
         */
	outb(0x70, 0x31);
	j = inb(0x71);
	j <<= 8;
	outb(0x70, 0x30);
	j |= inb(0x71);
	dpt_sysinfo.extendedMemSize = j;
	dpt_sysinfo.flags |= SI_MemorySizeValid;

	/* If there is 1 or 2 drives found, set up the drive parameters */
	if (dpt_sysinfo.numDrives > 0) {
		/* Get the pointer from int 41 for the first drive parameters */
		addr = (char *) dpt_physmap(0x0104, 1024);

		if (addr != NULL) {
			j = *((ushort *) (addr + 2));
			j *= 16;
			j += *((ushort *) (addr));
			dpt_unphysmap(addr, 1024);
			addr = (char *) dpt_physmap(j, 1024);

			if (addr != NULL) {
				dpt_sysinfo.drives[0].cylinders = *((ushort *) addr);
				dpt_sysinfo.drives[0].heads = *(addr + 2);
				dpt_sysinfo.drives[0].sectors = *(addr + 14);
				dpt_unphysmap(addr, 1024);
			}
		}
		if (dpt_sysinfo.numDrives > 1) {
			/*
			 * Get the pointer from Int 46 for the second drive
			 * parameters
			 */
			addr = (char *) dpt_physmap(0x01118, 1024);
			j = *((ushort *) (addr + 2));
			j *= 16;
			j += *((ushort *) (addr));
			dpt_unphysmap(addr, 1024);
			addr = (char *) dpt_physmap(j, 1024);

			if (addr != NULL) {
				dpt_sysinfo.drives[1].cylinders = *((ushort *) addr);
				dpt_sysinfo.drives[1].heads = *(addr + 2);
				dpt_sysinfo.drives[1].sectors = *(addr + 14);
				dpt_unphysmap(addr, 1024);
			}
		}
		dpt_sysinfo.flags |= SI_DriveParamsValid;
	}
	splx(ospl);

	/* Get the processor information */
	dpt_sysinfo.flags |= SI_ProcessorValid;

	/* Get the bus I/O bus information */
	dpt_sysinfo.flags |= SI_BusTypeValid;
	dpt_sysinfo.busType = HBA_BUS_PCI;

	/* XXX Use _FreeBSD_Version_ */
	dpt_sysinfo.osType = OS_FREEBSD;
	dpt_sysinfo.osMajorVersion = osrelease[0] - '0';
	if (osrelease[1] == '.')
		dpt_sysinfo.osMinorVersion = osrelease[2] - '0';
	else
		dpt_sysinfo.osMinorVersion = 0;
	if (osrelease[3] == '.')
		dpt_sysinfo.osRevision = osrelease[4] - '0';
	else
		dpt_sysinfo.osMinorVersion = 0;
	if (osrelease[5] == '.')
		dpt_sysinfo.osSubRevision = osrelease[6] - '0';
	else
		dpt_sysinfo.osMinorVersion = 0;


	dpt_sysinfo.flags |= SI_OSversionValid;
}

static int
dpt_open(dev_t dev, int flags, int fmt, struct proc * p)
{
	int             minor_no;
	int             ospl;
	dpt_softc_t    *dpt;

	minor_no = minor(dev);

	if (dpt_minor2unit(minor_no) == -1)
		return (ENXIO);
	else
		dpt = dpt_minor2softc(minor_no);

	if (dpt == NULL)
		return (ENXIO);

	ospl = splbio();

	if (dpt->state & DPT_HA_CONTROL_ACTIVE) {
		splx(ospl);
		return (EBUSY);
	} else {
		if ((dpt_inbuf[minor_no & ~SCSI_CONTROL_MASK] = geteblk(PAGE_SIZE))
		    == NULL) {
#ifdef DPT_DEBUG_CONTROL
			printf("dpt%d: Failed to obtain an I/O buffer\n",
			       minor_no & ~SCSI_CONTROL_MASK);
#endif
			splx(ospl);
			return (EINVAL);
		}
	}

	dpt->state |= DPT_HA_CONTROL_ACTIVE;
	splx(ospl);
	return (0);
}

static int
dpt_close(dev_t dev, int flags, int fmt, struct proc * p)
{
	int             minor_no;
	dpt_softc_t    *dpt;

	minor_no = minor(dev);
	dpt = dpt_minor2softc(minor_no);

	if ((dpt_minor2unit(minor_no) == -1) || (dpt == NULL))
		return (ENXIO);
	else {
		brelse(dpt_inbuf[minor_no & ~SCSI_CONTROL_MASK]);
		dpt->state &= ~DPT_HA_CONTROL_ACTIVE;
		return (0);
	}
}

static int
dpt_write(dev_t dev, struct uio * uio, int ioflag)
{
	int             minor_no;
	int             unit;
	int             error;

	minor_no = minor(dev);

	if (minor_no & SCSI_CONTROL_MASK) {
#ifdef DPT_DEBUG_CONTROL
		printf("dpt%d:  I/O attempted to control channel (%x)\n",
		       dpt_minor2unit(minor_no), minor_no);
#endif
		return (ENXIO);
	}
	unit = dpt_minor2unit(minor_no);

	if (unit == -1) {
		return (ENXIO);
	} else if (uio->uio_resid > DPT_RW_CMD_LEN) {
		return (E2BIG);
	} else {
		char           *cp;
		int             length;

		cp = dpt_inbuf[minor_no]->b_data;
		length = uio->uio_resid;	/* uiomove will change it! */

		if ((error = uiomove(cp, length, uio) != 0)) {
#ifdef DPT_DEBUG_CONTROL
			printf("dpt%d: uiomove(%x, %d, %x) failed (%d)\n",
			       minor_no, cp, length, uio, error);
#endif
			return (error);
		} else {
			cp[length] = '\0';

			/* A real kludge, to allow plain echo(1) to work */
			if (cp[length - 1] == '\n')
				cp[length - 1] = '\0';

			strncpy(dpt_rw_command[unit], cp, DPT_RW_CMD_LEN);
#ifdef DPT_DEBUG_CONTROL
			/**
			 * For lack of anything better to do;
			 * For now, dump the data so we can look at it and rejoice
			 */
			printf("dpt%d: Command \"%s\" arrived\n",
			       unit, dpt_rw_command[unit]);
#endif
		}
	}

	return (error);
}

static int
dpt_read(dev_t dev, struct uio * uio, int ioflag)
{
	dpt_softc_t    *dpt;
	int             error;
	int             minor_no;
	int             ospl;

	minor_no = minor(dev);
	error = 0;

#ifdef DPT_DEBUG_CONTROL
	printf("dpt%d: read, count = %d, dev = %08x\n",
	       minor_no, uio->uio_resid, dev);
#endif

	if (minor_no & SCSI_CONTROL_MASK) {
#ifdef DPT_DEBUG_CONTROL
		printf("dpt%d:  I/O attempted to control channel (%x)\n",
		       dpt_minor2unit(minor_no), minor_no);
#endif
		return (ENXIO);
	}
	if (dpt_minor2unit(minor_no) == -1) {
		return (ENXIO);
	}
	/*
	 * else if ( uio->uio_resid > PAGE_SIZE ) { return(E2BIG); }
	 */ 
	else {
		char           *work_buffer;
		char           *wbp;
		char           *command;
		int             work_size;
		int             ndx;
		int             x;

		if ((dpt = dpt_minor2softc(minor_no)) == NULL)
			return (ENXIO);

		work_buffer = (u_int8_t *) malloc(PAGE_SIZE, M_TEMP, M_WAITOK);
		wbp = work_buffer;
		work_size = 0;

		ospl = splbio();

		command = dpt_rw_command[dpt->unit];
		if (strcmp(command, DPT_RW_CMD_DUMP_SOFTC) == 0) {
			x = sprintf(wbp, "dpt%d:%s:%s:%s:%s:%x\n",
				    dpt->unit,
				    dpt->board_data.vendor,
				    dpt->board_data.modelNum,
				    dpt->board_data.firmware,
				    dpt->board_data.protocol,
				    dpt->EATA_revision);
			work_size += x;
			wbp += x;

		} else if (strcmp(command, DPT_RW_CMD_DUMP_SYSINFO) == 0) {
			x = sprintf(wbp, "dpt%d:%d:%d:%d:%d:%d:%d:%d:%d:%s:"
				    "%d:%d:%d:%d:%d:%d:%d:%d\n",
				    dpt->unit,
				    dpt_sysinfo.drive0CMOS,
				    dpt_sysinfo.drive1CMOS,
				    dpt_sysinfo.numDrives,
				    dpt_sysinfo.processorFamily,
				    dpt_sysinfo.processorType,
				    dpt_sysinfo.smartROMMajorVersion,
				    dpt_sysinfo.smartROMMinorVersion,
				    dpt_sysinfo.smartROMRevision,
				    i2bin(dpt_sysinfo.flags,
					  sizeof(dpt->queue_status) * 8),
				    dpt_sysinfo.conventionalMemSize,
				    dpt_sysinfo.extendedMemSize,
			     dpt_sysinfo.osType, dpt_sysinfo.osMajorVersion,
			 dpt_sysinfo.osMinorVersion, dpt_sysinfo.osRevision,
			    dpt_sysinfo.osSubRevision, dpt_sysinfo.busType);
			work_size += x;
			wbp += x;

			for (ndx = 0; ndx < 16; ndx++) {
				if (dpt_sysinfo.drives[ndx].cylinders != 0) {
					x = sprintf(wbp, "dpt%d:d%dc%dh%ds%d\n",
						    dpt->unit,
						    ndx,
					  dpt_sysinfo.drives[ndx].cylinders,
					      dpt_sysinfo.drives[ndx].heads,
					   dpt_sysinfo.drives[ndx].sectors);
					work_size += x;
					wbp += x;
				}
			}
		} else if (strcmp(command, DPT_RW_CMD_DUMP_METRICS) == 0) {
			x = sprintf(wbp,
				    "dpt%d: No metrics available.\n"
				    "Run the dpt_dm command, or use the\n"
			   "DPT_IOCTL_INTERNAL_METRICS ioctl system call\n",
				    dpt->unit);
			work_size += x;
			wbp += x;
		} else if (strcmp(command, DPT_RW_CMD_CLEAR_METRICS) == 0) {
#ifdef DPT_MEASURE_PERFORMANCE
			dpt_reset_performance(dpt);
#endif				/* DPT_MEASURE_PERFORMANCE */

			x = sprintf(wbp, "dpt%d: Metrics have been cleared\n",
				    dpt->unit);
			work_size += x;
			wbp += x;
		} else if (strcmp(command, DPT_RW_CMD_SHOW_LED) == 0) {

			x = sprintf(wbp, "dpt%d:%s\n",
				dpt->unit, i2bin(dpt_blinking_led(dpt), 8));
			work_size += x;
			wbp += x;
		} else {
#ifdef DPT_DEBUG_CONTROL
			printf("dpt%d: Bad READ state (%s)\n", minor_no, command);
#endif
			splx(ospl);
			error = EINVAL;
		}

		if (error == 0) {
			work_buffer[work_size++] = '\0';
			error = uiomove(work_buffer, work_size, uio);
			uio->uio_resid = 0;
#ifdef DPT_DEBUG_CONTROL
			if (error) {
				printf("dpt%d: READ uimove failed (%d)\n", dpt->unit, error);
			}
#endif
		}
	}
	splx(ospl);
	return (error);
}

/**
 * This is the control syscall interface.
 * It should be binary compatible with UnixWare,
 * if not totally syntatically so.
 */

static int
dpt_ioctl(dev_t dev, u_long cmd, caddr_t cmdarg, int flags, struct proc * p)
{
	int             minor_no;
	dpt_softc_t    *dpt;
	dpt_user_softc_t udpt;
	int             result;
	int             ndx;
	eata_pt_t      *eata_pass_thru;

	minor_no = minor(dev);
	result = 0;

	if (!(minor_no & SCSI_CONTROL_MASK)) {
#ifdef DPT_DEBUG_CONTROL
		printf("dpt%d:  Control attempted to I/O channel (%x)\n",
		       dpt_minor2unit(minor_no), minor_no);
#endif				/* DEBUG */
		return (ENXIO);
	} else
		minor_no &= ~SCSI_CONTROL_MASK;

#ifdef DPT_DEBUG_CONTROL
	printf("dpt%d: IOCTL(%x, %x, %p, %x, %p)\n",
	       minor_no, dev, cmd, cmdarg, flags, p);
#endif				/* DEBUG */

	if ((dpt = dpt_minor2softc(minor_no)) == NULL)
		return (result);

	switch (cmd) {
#ifdef DPT_MEASURE_PERFORMANCE
	case DPT_IOCTL_INTERNAL_METRICS:	    
		memcpy(cmdarg, &dpt->performance, sizeof(dpt->performance));
		return (0);
#endif				/* DPT_MEASURE_PERFORMANCE */
	case DPT_IOCTL_SOFTC:
		udpt.unit = dpt->unit;
		udpt.handle_interrupts = dpt->handle_interrupts;
		udpt.target_mode_enabled = dpt->target_mode_enabled;
		udpt.spare = dpt->spare;

		udpt.total_ccbs_count = dpt->total_ccbs_count;
		udpt.free_ccbs_count = dpt->free_ccbs_count;
		udpt.waiting_ccbs_count = dpt->waiting_ccbs_count;
		udpt.submitted_ccbs_count = dpt->submitted_ccbs_count;
		udpt.completed_ccbs_count = dpt->completed_ccbs_count;

		udpt.queue_status = dpt->queue_status;
		udpt.free_lock = dpt->free_lock;
		udpt.waiting_lock = dpt->waiting_lock;
		udpt.submitted_lock = dpt->submitted_lock;
		udpt.completed_lock = dpt->completed_lock;

		udpt.commands_processed = dpt->commands_processed;
		udpt.lost_interrupts = dpt->lost_interrupts;

		udpt.channels = dpt->channels;
		udpt.max_id = dpt->max_id;
		udpt.max_lun = dpt->max_lun;

		udpt.io_base = dpt->io_base;
		udpt.v_membase = (u_int8_t *) dpt->v_membase;
		udpt.p_membase = (u_int8_t *) dpt->p_membase;

		udpt.irq = dpt->irq;
		udpt.dma_channel = dpt->dma_channel;

		udpt.board_data = dpt->board_data;
		udpt.EATA_revision = dpt->EATA_revision;
		udpt.bustype = dpt->bustype;
		udpt.state = dpt->state;

		udpt.primary = dpt->primary;
		udpt.more_support = dpt->more_support;
		udpt.immediate_support = dpt->immediate_support;
		udpt.broken_INQUIRY = dpt->broken_INQUIRY;
		udpt.spare2 = dpt->spare2;

		for (ndx = 0; ndx < MAX_CHANNELS; ndx++) {
			udpt.resetlevel[ndx] = dpt->resetlevel[ndx];
			udpt.hostid[ndx] = dpt->hostid[ndx];
		}

		udpt.last_ccb = dpt->last_ccb;
		udpt.cplen = dpt->cplen;
		udpt.cppadlen = dpt->cppadlen;
		udpt.queuesize = dpt->queuesize;
		udpt.sgsize = dpt->sgsize;
		udpt.cache_type = dpt->cache_type;
		udpt.cache_size = dpt->cache_size;

		memcpy(cmdarg, &udpt, sizeof(dpt_user_softc_t));
		return (0);
	case SDI_SEND:
	case DPT_IOCTL_SEND:
		eata_pass_thru = (eata_pt_t *) cmdarg;

		if ((eata_pass_thru->eataID[0] != 'E')
		    || (eata_pass_thru->eataID[1] != 'A')
		    || (eata_pass_thru->eataID[2] != 'T')
		    || (eata_pass_thru->eataID[3] != 'A')) {
			return (EFAULT);
		}
		switch (eata_pass_thru->command) {
		case DPT_SIGNATURE:
			return (copyout((char *) &dpt_sig,
				 (caddr_t *) eata_pass_thru->command_buffer,
					sizeof(dpt_sig)));
		case DPT_NUMCTRLS:
			return (copyout((char *) &dpt_controllers_present,
				 (caddr_t *) eata_pass_thru->command_buffer,
					sizeof(dpt_controllers_present)));
		case DPT_CTRLINFO:
			{
				dpt_compat_ha_t compat_softc;
				int             ndx;

				compat_softc.ha_state = dpt->state;	/* Different Meaning! */
				for (ndx = 0; ndx < MAX_CHANNELS; ndx++)
					compat_softc.ha_id[ndx] = dpt->hostid[ndx];

				compat_softc.ha_vect = dpt->irq;
				compat_softc.ha_base = BaseRegister(dpt);
				compat_softc.ha_max_jobs = dpt->total_ccbs_count;
				compat_softc.ha_cache = dpt->cache_type;
				compat_softc.ha_cachesize = dpt->cache_size;
				compat_softc.ha_nbus = dpt->dma_channel + 1;
				compat_softc.ha_ntargets = dpt->max_id + 1;
				compat_softc.ha_nluns = dpt->max_lun + 1;
				compat_softc.ha_tshift = (dpt->max_id == 7) ? 3 : 4;
				compat_softc.ha_bshift = 2;
				compat_softc.ha_npend = dpt->submitted_ccbs_count;
				compat_softc.ha_active_jobs = dpt->waiting_ccbs_count;
				strncpy(compat_softc.ha_fw_version,
				    dpt->board_data.firmware,
				    sizeof(compat_softc.ha_fw_version));
				compat_softc.ha_ccb = NULL;
				compat_softc.ha_cblist = NULL;
				compat_softc.ha_dev = NULL;
				compat_softc.ha_StPkt_lock = NULL;
				compat_softc.ha_ccb_lock = NULL;
				compat_softc.ha_LuQWaiting = NULL;
				compat_softc.ha_QWait_lock = NULL;
				compat_softc.ha_QWait_opri = NULL;

				return (copyout((char *) &compat_softc,
				 (caddr_t *) eata_pass_thru->command_buffer,
						sizeof(dpt_compat_ha_t)));
			}
			break;

		case DPT_SYSINFO:
			return (copyout((char *) &dpt_sysinfo,
				 (caddr_t *) eata_pass_thru->command_buffer,
					sizeof(dpt_sysinfo)));
		case EATAUSRCMD:
			result = dpt_user_cmd(dpt, eata_pass_thru, cmdarg, minor_no);
			return (result);
		case DPT_BLINKLED:
			result = dpt_blinking_led(dpt);
			return (copyout((caddr_t) & result,
				 (caddr_t *) eata_pass_thru->command_buffer,
					sizeof(result)));
		default:
			printf("dpt%d: Invalid (%x) pass-throu command\n",
			       dpt->unit, eata_pass_thru->command);
			result = EINVAL;
		}

	default:
		printf("dpt%d: Invalid (%lx) IOCTL\n", dpt->unit, cmd);
		return (EINVAL);

	}

	return (result);
}

static          dpt_devsw_installed = 0;

static void
dpt_drvinit(void *unused)
{
	if (!dpt_devsw_installed) {
		if (bootverbose)
			printf("DPT:  RAID Manager driver, Version %d.%d.%d\n",
			       DPT_CTL_RELEASE, DPT_CTL_VERSION, DPT_CTL_PATCH);

		/* Add the I/O (data) channel */
		cdevsw_add(&dpt_cdevsw, 0, 0);

		dpt_devsw_installed = 1;
	}
	dpt_get_sysinfo();
}

SYSINIT(dpt_dev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE + CDEV_MAJOR, dpt_drvinit, NULL)
/* End of the dpt_control driver */