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freebsd-dev/sys/cam/scsi/scsi_sa.c
Scott Long 85d92640f8 Add a helper function for registering async callbacks. Besides 
eliminating a lot of duplicated code, this also fixes a locking edge case.
2007-05-16 16:54:23 +00:00

3627 lines
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/*-
* Implementation of SCSI Sequential Access Peripheral driver for CAM.
*
* Copyright (c) 1999, 2000 Matthew Jacob
* 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. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/queue.h>
#ifdef _KERNEL
#include <sys/systm.h>
#include <sys/kernel.h>
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <sys/bio.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/mtio.h>
#ifdef _KERNEL
#include <sys/conf.h>
#endif
#include <sys/fcntl.h>
#include <sys/devicestat.h>
#ifndef _KERNEL
#include <stdio.h>
#include <string.h>
#endif
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_sa.h>
#ifdef _KERNEL
#include <opt_sa.h>
#ifndef SA_IO_TIMEOUT
#define SA_IO_TIMEOUT 4
#endif
#ifndef SA_SPACE_TIMEOUT
#define SA_SPACE_TIMEOUT 1 * 60
#endif
#ifndef SA_REWIND_TIMEOUT
#define SA_REWIND_TIMEOUT 2 * 60
#endif
#ifndef SA_ERASE_TIMEOUT
#define SA_ERASE_TIMEOUT 4 * 60
#endif
#define SCSIOP_TIMEOUT (60 * 1000) /* not an option */
#define IO_TIMEOUT (SA_IO_TIMEOUT * 60 * 1000)
#define REWIND_TIMEOUT (SA_REWIND_TIMEOUT * 60 * 1000)
#define ERASE_TIMEOUT (SA_ERASE_TIMEOUT * 60 * 1000)
#define SPACE_TIMEOUT (SA_SPACE_TIMEOUT * 60 * 1000)
/*
* Additional options that can be set for config: SA_1FM_AT_EOT
*/
#ifndef UNUSED_PARAMETER
#define UNUSED_PARAMETER(x) x = x
#endif
#define QFRLS(ccb) \
if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \
cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE)
/*
* Driver states
*/
MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers");
typedef enum {
SA_STATE_NORMAL, SA_STATE_ABNORMAL
} sa_state;
#define ccb_pflags ppriv_field0
#define ccb_bp ppriv_ptr1
#define SA_CCB_BUFFER_IO 0x0
#define SA_CCB_WAITING 0x1
#define SA_CCB_TYPEMASK 0x1
#define SA_POSITION_UPDATED 0x2
#define Set_CCB_Type(x, type) \
x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK; \
x->ccb_h.ccb_pflags |= type
#define CCB_Type(x) (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK)
typedef enum {
SA_FLAG_OPEN = 0x0001,
SA_FLAG_FIXED = 0x0002,
SA_FLAG_TAPE_LOCKED = 0x0004,
SA_FLAG_TAPE_MOUNTED = 0x0008,
SA_FLAG_TAPE_WP = 0x0010,
SA_FLAG_TAPE_WRITTEN = 0x0020,
SA_FLAG_EOM_PENDING = 0x0040,
SA_FLAG_EIO_PENDING = 0x0080,
SA_FLAG_EOF_PENDING = 0x0100,
SA_FLAG_ERR_PENDING = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
SA_FLAG_EOF_PENDING),
SA_FLAG_INVALID = 0x0200,
SA_FLAG_COMP_ENABLED = 0x0400,
SA_FLAG_COMP_SUPP = 0x0800,
SA_FLAG_COMP_UNSUPP = 0x1000,
SA_FLAG_TAPE_FROZEN = 0x2000
} sa_flags;
typedef enum {
SA_MODE_REWIND = 0x00,
SA_MODE_NOREWIND = 0x01,
SA_MODE_OFFLINE = 0x02
} sa_mode;
typedef enum {
SA_PARAM_NONE = 0x00,
SA_PARAM_BLOCKSIZE = 0x01,
SA_PARAM_DENSITY = 0x02,
SA_PARAM_COMPRESSION = 0x04,
SA_PARAM_BUFF_MODE = 0x08,
SA_PARAM_NUMBLOCKS = 0x10,
SA_PARAM_WP = 0x20,
SA_PARAM_SPEED = 0x40,
SA_PARAM_ALL = 0x7f
} sa_params;
typedef enum {
SA_QUIRK_NONE = 0x00,
SA_QUIRK_NOCOMP = 0x01, /* Can't deal with compression at all */
SA_QUIRK_FIXED = 0x02, /* Force fixed mode */
SA_QUIRK_VARIABLE = 0x04, /* Force variable mode */
SA_QUIRK_2FM = 0x08, /* Needs Two File Marks at EOD */
SA_QUIRK_1FM = 0x10, /* No more than 1 File Mark at EOD */
SA_QUIRK_NODREAD = 0x20, /* Don't try and dummy read density */
SA_QUIRK_NO_MODESEL = 0x40, /* Don't do mode select at all */
SA_QUIRK_NO_CPAGE = 0x80 /* Don't use DEVICE COMPRESSION page */
} sa_quirks;
/* units are bits 4-7, 16-21 (1024 units) */
#define SAUNIT(DEV) \
(((minor(DEV) & 0xF0) >> 4) | ((minor(DEV) & 0x3f0000) >> 16))
#define SAMODE(z) ((minor(z) & 0x3))
#define SADENSITY(z) (((minor(z) >> 2) & 0x3))
#define SA_IS_CTRL(z) (minor(z) & (1 << 29))
#define SA_NOT_CTLDEV 0
#define SA_CTLDEV 1
#define SA_ATYPE_R 0
#define SA_ATYPE_NR 1
#define SA_ATYPE_ER 2
#define SAMINOR(ctl, unit, mode, access) \
((ctl << 29) | ((unit & 0x3f0) << 16) | ((unit & 0xf) << 4) | \
(mode << 0x2) | (access & 0x3))
#define SA_NUM_MODES 4
struct sa_devs {
struct cdev *ctl_dev;
struct sa_mode_devs {
struct cdev *r_dev;
struct cdev *nr_dev;
struct cdev *er_dev;
} mode_devs[SA_NUM_MODES];
};
struct sa_softc {
sa_state state;
sa_flags flags;
sa_quirks quirks;
struct bio_queue_head bio_queue;
int queue_count;
struct devstat *device_stats;
struct sa_devs devs;
int blk_gran;
int blk_mask;
int blk_shift;
u_int32_t max_blk;
u_int32_t min_blk;
u_int32_t comp_algorithm;
u_int32_t saved_comp_algorithm;
u_int32_t media_blksize;
u_int32_t last_media_blksize;
u_int32_t media_numblks;
u_int8_t media_density;
u_int8_t speed;
u_int8_t scsi_rev;
u_int8_t dsreg; /* mtio mt_dsreg, redux */
int buffer_mode;
int filemarks;
union ccb saved_ccb;
int last_resid_was_io;
/*
* Relative to BOT Location.
*/
daddr_t fileno;
daddr_t blkno;
/*
* Latched Error Info
*/
struct {
struct scsi_sense_data _last_io_sense;
u_int32_t _last_io_resid;
u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
struct scsi_sense_data _last_ctl_sense;
u_int32_t _last_ctl_resid;
u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
#define last_io_sense errinfo._last_io_sense
#define last_io_resid errinfo._last_io_resid
#define last_io_cdb errinfo._last_io_cdb
#define last_ctl_sense errinfo._last_ctl_sense
#define last_ctl_resid errinfo._last_ctl_resid
#define last_ctl_cdb errinfo._last_ctl_cdb
} errinfo;
/*
* Misc other flags/state
*/
u_int32_t
: 29,
open_rdonly : 1, /* open read-only */
open_pending_mount : 1, /* open pending mount */
ctrl_mode : 1; /* control device open */
};
struct sa_quirk_entry {
struct scsi_inquiry_pattern inq_pat; /* matching pattern */
sa_quirks quirks; /* specific quirk type */
u_int32_t prefblk; /* preferred blocksize when in fixed mode */
};
static struct sa_quirk_entry sa_quirk_table[] =
{
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
"ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"Python*", "*"}, SA_QUIRK_NODREAD, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"VIPER 2525 25462", "-011"},
SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
},
#if 0
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
},
#endif
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
"*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
"123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{ /* jreynold@primenet.com */
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
"STT8000N*", "*"}, SA_QUIRK_1FM, 0
},
{ /* mike@sentex.net */
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
"STT20000*", "*"}, SA_QUIRK_1FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" SLR*", "*"}, SA_QUIRK_1FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
"5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
"51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
}
};
static d_open_t saopen;
static d_close_t saclose;
static d_strategy_t sastrategy;
static d_ioctl_t saioctl;
static periph_init_t sainit;
static periph_ctor_t saregister;
static periph_oninv_t saoninvalidate;
static periph_dtor_t sacleanup;
static periph_start_t sastart;
static void saasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg);
static void sadone(struct cam_periph *periph,
union ccb *start_ccb);
static int saerror(union ccb *ccb, u_int32_t cam_flags,
u_int32_t sense_flags);
static int samarkswanted(struct cam_periph *);
static int sacheckeod(struct cam_periph *periph);
static int sagetparams(struct cam_periph *periph,
sa_params params_to_get,
u_int32_t *blocksize, u_int8_t *density,
u_int32_t *numblocks, int *buff_mode,
u_int8_t *write_protect, u_int8_t *speed,
int *comp_supported, int *comp_enabled,
u_int32_t *comp_algorithm,
sa_comp_t *comp_page);
static int sasetparams(struct cam_periph *periph,
sa_params params_to_set,
u_int32_t blocksize, u_int8_t density,
u_int32_t comp_algorithm,
u_int32_t sense_flags);
static void saprevent(struct cam_periph *periph, int action);
static int sarewind(struct cam_periph *periph);
static int saspace(struct cam_periph *periph, int count,
scsi_space_code code);
static int samount(struct cam_periph *, int, struct cdev *);
static int saretension(struct cam_periph *periph);
static int sareservereleaseunit(struct cam_periph *periph,
int reserve);
static int saloadunload(struct cam_periph *periph, int load);
static int saerase(struct cam_periph *periph, int longerase);
static int sawritefilemarks(struct cam_periph *periph,
int nmarks, int setmarks);
static int sardpos(struct cam_periph *periph, int, u_int32_t *);
static int sasetpos(struct cam_periph *periph, int, u_int32_t *);
static struct periph_driver sadriver =
{
sainit, "sa",
TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
};
PERIPHDRIVER_DECLARE(sa, sadriver);
/* For 2.2-stable support */
#ifndef D_TAPE
#define D_TAPE 0
#endif
static struct cdevsw sa_cdevsw = {
.d_version = D_VERSION,
.d_open = saopen,
.d_close = saclose,
.d_read = physread,
.d_write = physwrite,
.d_ioctl = saioctl,
.d_strategy = sastrategy,
.d_name = "sa",
.d_flags = D_TAPE | D_NEEDGIANT,
};
static int
saopen(struct cdev *dev, int flags, int fmt, struct thread *td)
{
struct cam_periph *periph;
struct sa_softc *softc;
int unit;
int error;
unit = SAUNIT(dev);
periph = (struct cam_periph *)dev->si_drv1;
if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
return (ENXIO);
}
cam_periph_lock(periph);
softc = (struct sa_softc *)periph->softc;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
("saopen(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
if (SA_IS_CTRL(dev)) {
softc->ctrl_mode = 1;
cam_periph_unlock(periph);
return (0);
}
if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
cam_periph_unlock(periph);
cam_periph_release(periph);
return (error);
}
if (softc->flags & SA_FLAG_OPEN) {
error = EBUSY;
} else if (softc->flags & SA_FLAG_INVALID) {
error = ENXIO;
} else {
/*
* Preserve whether this is a read_only open.
*/
softc->open_rdonly = (flags & O_RDWR) == O_RDONLY;
/*
* The function samount ensures media is loaded and ready.
* It also does a device RESERVE if the tape isn't yet mounted.
*
* If the mount fails and this was a non-blocking open,
* make this a 'open_pending_mount' action.
*/
error = samount(periph, flags, dev);
if (error && (flags & O_NONBLOCK)) {
softc->flags |= SA_FLAG_OPEN;
softc->open_pending_mount = 1;
cam_periph_unhold(periph);
cam_periph_unlock(periph);
return (0);
}
}
if (error) {
cam_periph_unhold(periph);
cam_periph_unlock(periph);
cam_periph_release(periph);
return (error);
}
saprevent(periph, PR_PREVENT);
softc->flags |= SA_FLAG_OPEN;
cam_periph_unhold(periph);
cam_periph_unlock(periph);
return (error);
}
static int
saclose(struct cdev *dev, int flag, int fmt, struct thread *td)
{
struct cam_periph *periph;
struct sa_softc *softc;
int unit, mode, error, writing, tmp;
int closedbits = SA_FLAG_OPEN;
unit = SAUNIT(dev);
mode = SAMODE(dev);
periph = (struct cam_periph *)dev->si_drv1;
if (periph == NULL)
return (ENXIO);
cam_periph_lock(periph);
softc = (struct sa_softc *)periph->softc;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
("saclose(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
softc->open_rdonly = 0;
if (SA_IS_CTRL(dev)) {
softc->ctrl_mode = 0;
cam_periph_unlock(periph);
cam_periph_release(periph);
return (0);
}
if (softc->open_pending_mount) {
softc->flags &= ~SA_FLAG_OPEN;
softc->open_pending_mount = 0;
cam_periph_unlock(periph);
cam_periph_release(periph);
return (0);
}
if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
cam_periph_unlock(periph);
return (error);
}
/*
* Were we writing the tape?
*/
writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
/*
* See whether or not we need to write filemarks. If this
* fails, we probably have to assume we've lost tape
* position.
*/
error = sacheckeod(periph);
if (error) {
xpt_print(periph->path,
"failed to write terminating filemark(s)\n");
softc->flags |= SA_FLAG_TAPE_FROZEN;
}
/*
* Whatever we end up doing, allow users to eject tapes from here on.
*/
saprevent(periph, PR_ALLOW);
/*
* Decide how to end...
*/
if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
closedbits |= SA_FLAG_TAPE_FROZEN;
} else switch (mode) {
case SA_MODE_OFFLINE:
/*
* An 'offline' close is an unconditional release of
* frozen && mount conditions, irrespective of whether
* these operations succeeded. The reason for this is
* to allow at least some kind of programmatic way
* around our state getting all fouled up. If somebody
* issues an 'offline' command, that will be allowed
* to clear state.
*/
(void) sarewind(periph);
(void) saloadunload(periph, FALSE);
closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
break;
case SA_MODE_REWIND:
/*
* If the rewind fails, return an error- if anyone cares,
* but not overwriting any previous error.
*
* We don't clear the notion of mounted here, but we do
* clear the notion of frozen if we successfully rewound.
*/
tmp = sarewind(periph);
if (tmp) {
if (error != 0)
error = tmp;
} else {
closedbits |= SA_FLAG_TAPE_FROZEN;
}
break;
case SA_MODE_NOREWIND:
/*
* If we're not rewinding/unloading the tape, find out
* whether we need to back up over one of two filemarks
* we wrote (if we wrote two filemarks) so that appends
* from this point on will be sane.
*/
if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
tmp = saspace(periph, -1, SS_FILEMARKS);
if (tmp) {
xpt_print(periph->path, "unable to backspace "
"over one of double filemarks at end of "
"tape\n");
xpt_print(periph->path, "it is possible that "
"this device needs a SA_QUIRK_1FM quirk set"
"for it\n");
softc->flags |= SA_FLAG_TAPE_FROZEN;
}
}
break;
default:
xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode);
/* NOTREACHED */
break;
}
/*
* We wish to note here that there are no more filemarks to be written.
*/
softc->filemarks = 0;
softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
/*
* And we are no longer open for business.
*/
softc->flags &= ~closedbits;
/*
* Inform users if tape state if frozen....
*/
if (softc->flags & SA_FLAG_TAPE_FROZEN) {
xpt_print(periph->path, "tape is now frozen- use an OFFLINE, "
"REWIND or MTEOM command to clear this state.\n");
}
/* release the device if it is no longer mounted */
if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
sareservereleaseunit(periph, FALSE);
cam_periph_unhold(periph);
cam_periph_unlock(periph);
cam_periph_release(periph);
return (error);
}
/*
* Actually translate the requested transfer into one the physical driver
* can understand. The transfer is described by a buf and will include
* only one physical transfer.
*/
static void
sastrategy(struct bio *bp)
{
struct cam_periph *periph;
struct sa_softc *softc;
bp->bio_resid = bp->bio_bcount;
if (SA_IS_CTRL(bp->bio_dev)) {
biofinish(bp, NULL, EINVAL);
return;
}
periph = (struct cam_periph *)bp->bio_dev->si_drv1;
if (periph == NULL) {
biofinish(bp, NULL, ENXIO);
return;
}
cam_periph_lock(periph);
softc = (struct sa_softc *)periph->softc;
if (softc->flags & SA_FLAG_INVALID) {
cam_periph_unlock(periph);
biofinish(bp, NULL, ENXIO);
return;
}
if (softc->flags & SA_FLAG_TAPE_FROZEN) {
cam_periph_unlock(periph);
biofinish(bp, NULL, EPERM);
return;
}
/*
* This should actually never occur as the write(2)
* system call traps attempts to write to a read-only
* file descriptor.
*/
if (bp->bio_cmd == BIO_WRITE && softc->open_rdonly) {
cam_periph_unlock(periph);
biofinish(bp, NULL, EBADF);
return;
}
if (softc->open_pending_mount) {
int error = samount(periph, 0, bp->bio_dev);
if (error) {
cam_periph_unlock(periph);
biofinish(bp, NULL, ENXIO);
return;
}
saprevent(periph, PR_PREVENT);
softc->open_pending_mount = 0;
}
/*
* If it's a null transfer, return immediately
*/
if (bp->bio_bcount == 0) {
cam_periph_unlock(periph);
biodone(bp);
return;
}
/* valid request? */
if (softc->flags & SA_FLAG_FIXED) {
/*
* Fixed block device. The byte count must
* be a multiple of our block size.
*/
if (((softc->blk_mask != ~0) &&
((bp->bio_bcount & softc->blk_mask) != 0)) ||
((softc->blk_mask == ~0) &&
((bp->bio_bcount % softc->min_blk) != 0))) {
xpt_print(periph->path, "Invalid request. Fixed block "
"device requests must be a multiple of %d bytes\n",
softc->min_blk);
cam_periph_unlock(periph);
biofinish(bp, NULL, EINVAL);
return;
}
} else if ((bp->bio_bcount > softc->max_blk) ||
(bp->bio_bcount < softc->min_blk) ||
(bp->bio_bcount & softc->blk_mask) != 0) {
xpt_print_path(periph->path);
printf("Invalid request. Variable block "
"device requests must be ");
if (softc->blk_mask != 0) {
printf("a multiple of %d ", (0x1 << softc->blk_gran));
}
printf("between %d and %d bytes\n", softc->min_blk,
softc->max_blk);
cam_periph_unlock(periph);
biofinish(bp, NULL, EINVAL);
return;
}
/*
* Place it at the end of the queue.
*/
bioq_insert_tail(&softc->bio_queue, bp);
softc->queue_count++;
#if 0
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount,
(softc->flags & SA_FLAG_FIXED)? "fixed" : "variable",
(bp->bio_cmd == BIO_READ)? "read" : "write"));
#endif
if (softc->queue_count > 1) {
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("sastrategy: queue count now %d\n", softc->queue_count));
}
/*
* Schedule ourselves for performing the work.
*/
xpt_schedule(periph, 1);
cam_periph_unlock(periph);
return;
}
#define PENDING_MOUNT_CHECK(softc, periph, dev) \
if (softc->open_pending_mount) { \
error = samount(periph, 0, dev); \
if (error) { \
break; \
} \
saprevent(periph, PR_PREVENT); \
softc->open_pending_mount = 0; \
}
static int
saioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
{
struct cam_periph *periph;
struct sa_softc *softc;
scsi_space_code spaceop;
int didlockperiph = 0;
int mode;
int error = 0;
mode = SAMODE(dev);
error = 0; /* shut up gcc */
spaceop = 0; /* shut up gcc */
periph = (struct cam_periph *)dev->si_drv1;
if (periph == NULL)
return (ENXIO);
cam_periph_lock(periph);
softc = (struct sa_softc *)periph->softc;
/*
* Check for control mode accesses. We allow MTIOCGET and
* MTIOCERRSTAT (but need to be the only one open in order
* to clear latched status), and MTSETBSIZE, MTSETDNSTY
* and MTCOMP (but need to be the only one accessing this
* device to run those).
*/
if (SA_IS_CTRL(dev)) {
switch (cmd) {
case MTIOCGETEOTMODEL:
case MTIOCGET:
break;
case MTIOCERRSTAT:
/*
* If the periph isn't already locked, lock it
* so our MTIOCERRSTAT can reset latched error stats.
*
* If the periph is already locked, skip it because
* we're just getting status and it'll be up to the
* other thread that has this device open to do
* an MTIOCERRSTAT that would clear latched status.
*/
if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
error = cam_periph_hold(periph, PRIBIO|PCATCH);
if (error != 0)
return (error);
didlockperiph = 1;
}
break;
case MTIOCTOP:
{
struct mtop *mt = (struct mtop *) arg;
/*
* Check to make sure it's an OP we can perform
* with no media inserted.
*/
switch (mt->mt_op) {
case MTSETBSIZ:
case MTSETDNSTY:
case MTCOMP:
mt = NULL;
/* FALLTHROUGH */
default:
break;
}
if (mt != NULL) {
break;
}
/* FALLTHROUGH */
}
case MTIOCSETEOTMODEL:
/*
* We need to acquire the peripheral here rather
* than at open time because we are sharing writable
* access to data structures.
*/
error = cam_periph_hold(periph, PRIBIO|PCATCH);
if (error != 0)
return (error);
didlockperiph = 1;
break;
default:
return (EINVAL);
}
}
/*
* Find the device that the user is talking about
*/
switch (cmd) {
case MTIOCGET:
{
struct mtget *g = (struct mtget *)arg;
/*
* If this isn't the control mode device, actually go out
* and ask the drive again what it's set to.
*/
if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) {
u_int8_t write_protect;
int comp_enabled, comp_supported;
error = sagetparams(periph, SA_PARAM_ALL,
&softc->media_blksize, &softc->media_density,
&softc->media_numblks, &softc->buffer_mode,
&write_protect, &softc->speed, &comp_supported,
&comp_enabled, &softc->comp_algorithm, NULL);
if (error)
break;
if (write_protect)
softc->flags |= SA_FLAG_TAPE_WP;
else
softc->flags &= ~SA_FLAG_TAPE_WP;
softc->flags &= ~(SA_FLAG_COMP_SUPP|
SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP);
if (comp_supported) {
if (softc->saved_comp_algorithm == 0)
softc->saved_comp_algorithm =
softc->comp_algorithm;
softc->flags |= SA_FLAG_COMP_SUPP;
if (comp_enabled)
softc->flags |= SA_FLAG_COMP_ENABLED;
} else
softc->flags |= SA_FLAG_COMP_UNSUPP;
}
bzero(g, sizeof(struct mtget));
g->mt_type = MT_ISAR;
if (softc->flags & SA_FLAG_COMP_UNSUPP) {
g->mt_comp = MT_COMP_UNSUPP;
g->mt_comp0 = MT_COMP_UNSUPP;
g->mt_comp1 = MT_COMP_UNSUPP;
g->mt_comp2 = MT_COMP_UNSUPP;
g->mt_comp3 = MT_COMP_UNSUPP;
} else {
if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
g->mt_comp = MT_COMP_DISABLED;
} else {
g->mt_comp = softc->comp_algorithm;
}
g->mt_comp0 = softc->comp_algorithm;
g->mt_comp1 = softc->comp_algorithm;
g->mt_comp2 = softc->comp_algorithm;
g->mt_comp3 = softc->comp_algorithm;
}
g->mt_density = softc->media_density;
g->mt_density0 = softc->media_density;
g->mt_density1 = softc->media_density;
g->mt_density2 = softc->media_density;
g->mt_density3 = softc->media_density;
g->mt_blksiz = softc->media_blksize;
g->mt_blksiz0 = softc->media_blksize;
g->mt_blksiz1 = softc->media_blksize;
g->mt_blksiz2 = softc->media_blksize;
g->mt_blksiz3 = softc->media_blksize;
g->mt_fileno = softc->fileno;
g->mt_blkno = softc->blkno;
g->mt_dsreg = (short) softc->dsreg;
/*
* Yes, we know that this is likely to overflow
*/
if (softc->last_resid_was_io) {
if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
softc->last_io_resid = 0;
}
}
} else {
if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
softc->last_ctl_resid = 0;
}
}
}
error = 0;
break;
}
case MTIOCERRSTAT:
{
struct scsi_tape_errors *sep =
&((union mterrstat *)arg)->scsi_errstat;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
("saioctl: MTIOCERRSTAT\n"));
bzero(sep, sizeof(*sep));
sep->io_resid = softc->last_io_resid;
bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
sizeof (sep->io_sense));
bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
sizeof (sep->io_cdb));
sep->ctl_resid = softc->last_ctl_resid;
bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
sizeof (sep->ctl_sense));
bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
sizeof (sep->ctl_cdb));
if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) ||
didlockperiph)
bzero((caddr_t) &softc->errinfo,
sizeof (softc->errinfo));
error = 0;
break;
}
case MTIOCTOP:
{
struct mtop *mt;
int count;
PENDING_MOUNT_CHECK(softc, periph, dev);
mt = (struct mtop *)arg;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
("saioctl: op=0x%x count=0x%x\n",
mt->mt_op, mt->mt_count));
count = mt->mt_count;
switch (mt->mt_op) {
case MTWEOF: /* write an end-of-file marker */
/*
* We don't need to clear the SA_FLAG_TAPE_WRITTEN
* flag because by keeping track of filemarks
* we have last written we know ehether or not
* we need to write more when we close the device.
*/
error = sawritefilemarks(periph, count, FALSE);
break;
case MTWSS: /* write a setmark */
error = sawritefilemarks(periph, count, TRUE);
break;
case MTBSR: /* backward space record */
case MTFSR: /* forward space record */
case MTBSF: /* backward space file */
case MTFSF: /* forward space file */
case MTBSS: /* backward space setmark */
case MTFSS: /* forward space setmark */
case MTEOD: /* space to end of recorded medium */
{
int nmarks;
spaceop = SS_FILEMARKS;
nmarks = softc->filemarks;
error = sacheckeod(periph);
if (error) {
xpt_print(periph->path,
"EOD check prior to spacing failed\n");
softc->flags |= SA_FLAG_EIO_PENDING;
break;
}
nmarks -= softc->filemarks;
switch(mt->mt_op) {
case MTBSR:
count = -count;
/* FALLTHROUGH */
case MTFSR:
spaceop = SS_BLOCKS;
break;
case MTBSF:
count = -count;
/* FALLTHROUGH */
case MTFSF:
break;
case MTBSS:
count = -count;
/* FALLTHROUGH */
case MTFSS:
spaceop = SS_SETMARKS;
break;
case MTEOD:
spaceop = SS_EOD;
count = 0;
nmarks = 0;
break;
default:
error = EINVAL;
break;
}
if (error)
break;
nmarks = softc->filemarks;
/*
* XXX: Why are we checking again?
*/
error = sacheckeod(periph);
if (error)
break;
nmarks -= softc->filemarks;
error = saspace(periph, count - nmarks, spaceop);
/*
* At this point, clear that we've written the tape
* and that we've written any filemarks. We really
* don't know what the applications wishes to do next-
* the sacheckeod's will make sure we terminated the
* tape correctly if we'd been writing, but the next
* action the user application takes will set again
* whether we need to write filemarks.
*/
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->filemarks = 0;
break;
}
case MTREW: /* rewind */
PENDING_MOUNT_CHECK(softc, periph, dev);
(void) sacheckeod(periph);
error = sarewind(periph);
/* see above */
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->flags &= ~SA_FLAG_ERR_PENDING;
softc->filemarks = 0;
break;
case MTERASE: /* erase */
PENDING_MOUNT_CHECK(softc, periph, dev);
error = saerase(periph, count);
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->flags &= ~SA_FLAG_ERR_PENDING;
break;
case MTRETENS: /* re-tension tape */
PENDING_MOUNT_CHECK(softc, periph, dev);
error = saretension(periph);
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->flags &= ~SA_FLAG_ERR_PENDING;
break;
case MTOFFL: /* rewind and put the drive offline */
PENDING_MOUNT_CHECK(softc, periph, dev);
(void) sacheckeod(periph);
/* see above */
softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
softc->filemarks = 0;
error = sarewind(periph);
/* clear the frozen flag anyway */
softc->flags &= ~SA_FLAG_TAPE_FROZEN;
/*
* Be sure to allow media removal before ejecting.
*/
saprevent(periph, PR_ALLOW);
if (error == 0) {
error = saloadunload(periph, FALSE);
if (error == 0) {
softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
}
}
break;
case MTNOP: /* no operation, sets status only */
case MTCACHE: /* enable controller cache */
case MTNOCACHE: /* disable controller cache */
error = 0;
break;
case MTSETBSIZ: /* Set block size for device */
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
0, 0, 0);
if (error == 0) {
softc->last_media_blksize =
softc->media_blksize;
softc->media_blksize = count;
if (count) {
softc->flags |= SA_FLAG_FIXED;
if (powerof2(count)) {
softc->blk_shift =
ffs(count) - 1;
softc->blk_mask = count - 1;
} else {
softc->blk_mask = ~0;
softc->blk_shift = 0;
}
/*
* Make the user's desire 'persistent'.
*/
softc->quirks &= ~SA_QUIRK_VARIABLE;
softc->quirks |= SA_QUIRK_FIXED;
} else {
softc->flags &= ~SA_FLAG_FIXED;
if (softc->max_blk == 0) {
softc->max_blk = ~0;
}
softc->blk_shift = 0;
if (softc->blk_gran != 0) {
softc->blk_mask =
softc->blk_gran - 1;
} else {
softc->blk_mask = 0;
}
/*
* Make the user's desire 'persistent'.
*/
softc->quirks |= SA_QUIRK_VARIABLE;
softc->quirks &= ~SA_QUIRK_FIXED;
}
}
break;
case MTSETDNSTY: /* Set density for device and mode */
PENDING_MOUNT_CHECK(softc, periph, dev);
if (count > UCHAR_MAX) {
error = EINVAL;
break;
} else {
error = sasetparams(periph, SA_PARAM_DENSITY,
0, count, 0, 0);
}
break;
case MTCOMP: /* enable compression */
PENDING_MOUNT_CHECK(softc, periph, dev);
/*
* Some devices don't support compression, and
* don't like it if you ask them for the
* compression page.
*/
if ((softc->quirks & SA_QUIRK_NOCOMP) ||
(softc->flags & SA_FLAG_COMP_UNSUPP)) {
error = ENODEV;
break;
}
error = sasetparams(periph, SA_PARAM_COMPRESSION,
0, 0, count, SF_NO_PRINT);
break;
default:
error = EINVAL;
}
break;
}
case MTIOCIEOT:
case MTIOCEEOT:
error = 0;
break;
case MTIOCRDSPOS:
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sardpos(periph, 0, (u_int32_t *) arg);
break;
case MTIOCRDHPOS:
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sardpos(periph, 1, (u_int32_t *) arg);
break;
case MTIOCSLOCATE:
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sasetpos(periph, 0, (u_int32_t *) arg);
break;
case MTIOCHLOCATE:
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sasetpos(periph, 1, (u_int32_t *) arg);
break;
case MTIOCGETEOTMODEL:
error = 0;
if (softc->quirks & SA_QUIRK_1FM)
mode = 1;
else
mode = 2;
*((u_int32_t *) arg) = mode;
break;
case MTIOCSETEOTMODEL:
error = 0;
switch (*((u_int32_t *) arg)) {
case 1:
softc->quirks &= ~SA_QUIRK_2FM;
softc->quirks |= SA_QUIRK_1FM;
break;
case 2:
softc->quirks &= ~SA_QUIRK_1FM;
softc->quirks |= SA_QUIRK_2FM;
break;
default:
error = EINVAL;
break;
}
break;
default:
error = cam_periph_ioctl(periph, cmd, arg, saerror);
break;
}
/*
* Check to see if we cleared a frozen state
*/
if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
switch(cmd) {
case MTIOCRDSPOS:
case MTIOCRDHPOS:
case MTIOCSLOCATE:
case MTIOCHLOCATE:
softc->fileno = (daddr_t) -1;
softc->blkno = (daddr_t) -1;
softc->flags &= ~SA_FLAG_TAPE_FROZEN;
xpt_print(periph->path,
"tape state now unfrozen.\n");
break;
default:
break;
}
}
if (didlockperiph) {
cam_periph_unhold(periph);
}
cam_periph_unlock(periph);
return (error);
}
static void
sainit(void)
{
cam_status status;
/*
* Install a global async callback.
*/
status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL);
if (status != CAM_REQ_CMP) {
printf("sa: Failed to attach master async callback "
"due to status 0x%x!\n", status);
}
}
static void
saoninvalidate(struct cam_periph *periph)
{
struct sa_softc *softc;
softc = (struct sa_softc *)periph->softc;
/*
* De-register any async callbacks.
*/
xpt_register_async(0, saasync, periph, periph->path);
softc->flags |= SA_FLAG_INVALID;
/*
* Return all queued I/O with ENXIO.
* XXX Handle any transactions queued to the card
* with XPT_ABORT_CCB.
*/
bioq_flush(&softc->bio_queue, NULL, ENXIO);
softc->queue_count = 0;
xpt_print(periph->path, "lost device\n");
}
static void
sacleanup(struct cam_periph *periph)
{
struct sa_softc *softc;
int i;
softc = (struct sa_softc *)periph->softc;
devstat_remove_entry(softc->device_stats);
destroy_dev(softc->devs.ctl_dev);
for (i = 0; i < SA_NUM_MODES; i++) {
destroy_dev(softc->devs.mode_devs[i].r_dev);
destroy_dev(softc->devs.mode_devs[i].nr_dev);
destroy_dev(softc->devs.mode_devs[i].er_dev);
}
xpt_print(periph->path, "removing device entry\n");
free(softc, M_SCSISA);
}
static void
saasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg)
{
struct cam_periph *periph;
periph = (struct cam_periph *)callback_arg;
switch (code) {
case AC_FOUND_DEVICE:
{
struct ccb_getdev *cgd;
cam_status status;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL)
break;
if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
break;
/*
* Allocate a peripheral instance for
* this device and start the probe
* process.
*/
status = cam_periph_alloc(saregister, saoninvalidate,
sacleanup, sastart,
"sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
saasync, AC_FOUND_DEVICE, cgd);
if (status != CAM_REQ_CMP
&& status != CAM_REQ_INPROG)
printf("saasync: Unable to probe new device "
"due to status 0x%x\n", status);
break;
}
default:
cam_periph_async(periph, code, path, arg);
break;
}
}
static cam_status
saregister(struct cam_periph *periph, void *arg)
{
struct sa_softc *softc;
struct ccb_getdev *cgd;
caddr_t match;
int i;
cgd = (struct ccb_getdev *)arg;
if (periph == NULL) {
printf("saregister: periph was NULL!!\n");
return (CAM_REQ_CMP_ERR);
}
if (cgd == NULL) {
printf("saregister: no getdev CCB, can't register device\n");
return (CAM_REQ_CMP_ERR);
}
softc = (struct sa_softc *)
malloc(sizeof (*softc), M_SCSISA, M_NOWAIT | M_ZERO);
if (softc == NULL) {
printf("saregister: Unable to probe new device. "
"Unable to allocate softc\n");
return (CAM_REQ_CMP_ERR);
}
softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
softc->state = SA_STATE_NORMAL;
softc->fileno = (daddr_t) -1;
softc->blkno = (daddr_t) -1;
bioq_init(&softc->bio_queue);
periph->softc = softc;
/*
* See if this device has any quirks.
*/
match = cam_quirkmatch((caddr_t)&cgd->inq_data,
(caddr_t)sa_quirk_table,
sizeof(sa_quirk_table)/sizeof(*sa_quirk_table),
sizeof(*sa_quirk_table), scsi_inquiry_match);
if (match != NULL) {
softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
softc->last_media_blksize =
((struct sa_quirk_entry *)match)->prefblk;
#ifdef CAMDEBUG
xpt_print(periph->path, "found quirk entry %d\n",
(int) (((struct sa_quirk_entry *) match) - sa_quirk_table));
#endif
} else
softc->quirks = SA_QUIRK_NONE;
/*
* The SA driver supports a blocksize, but we don't know the
* blocksize until we media is inserted. So, set a flag to
* indicate that the blocksize is unavailable right now.
*/
cam_periph_unlock(periph);
softc->device_stats = devstat_new_entry("sa", periph->unit_number, 0,
DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE);
softc->devs.ctl_dev = make_dev(&sa_cdevsw, SAMINOR(SA_CTLDEV,
periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
0660, "%s%d.ctl", periph->periph_name, periph->unit_number);
softc->devs.ctl_dev->si_drv1 = periph;
for (i = 0; i < SA_NUM_MODES; i++) {
softc->devs.mode_devs[i].r_dev = make_dev(&sa_cdevsw,
SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R),
UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d",
periph->periph_name, periph->unit_number, i);
softc->devs.mode_devs[i].r_dev->si_drv1 = periph;
softc->devs.mode_devs[i].nr_dev = make_dev(&sa_cdevsw,
SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR),
UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d",
periph->periph_name, periph->unit_number, i);
softc->devs.mode_devs[i].nr_dev->si_drv1 = periph;
softc->devs.mode_devs[i].er_dev = make_dev(&sa_cdevsw,
SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER),
UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d",
periph->periph_name, periph->unit_number, i);
softc->devs.mode_devs[i].er_dev->si_drv1 = periph;
/*
* Make the (well known) aliases for the first mode.
*/
if (i == 0) {
struct cdev *alias;
alias = make_dev_alias(softc->devs.mode_devs[i].r_dev,
"%s%d", periph->periph_name, periph->unit_number);
alias->si_drv1 = periph;
alias = make_dev_alias(softc->devs.mode_devs[i].nr_dev,
"n%s%d", periph->periph_name, periph->unit_number);
alias->si_drv1 = periph;
alias = make_dev_alias(softc->devs.mode_devs[i].er_dev,
"e%s%d", periph->periph_name, periph->unit_number);
alias->si_drv1 = periph;
}
}
cam_periph_lock(periph);
/*
* Add an async callback so that we get
* notified if this device goes away.
*/
xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path);
xpt_announce_periph(periph, NULL);
return (CAM_REQ_CMP);
}
static void
sastart(struct cam_periph *periph, union ccb *start_ccb)
{
struct sa_softc *softc;
softc = (struct sa_softc *)periph->softc;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
switch (softc->state) {
case SA_STATE_NORMAL:
{
/* Pull a buffer from the queue and get going on it */
struct bio *bp;
/*
* See if there is a buf with work for us to do..
*/
bp = bioq_first(&softc->bio_queue);
if (periph->immediate_priority <= periph->pinfo.priority) {
CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
("queuing for immediate ccb\n"));
Set_CCB_Type(start_ccb, SA_CCB_WAITING);
SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
periph_links.sle);
periph->immediate_priority = CAM_PRIORITY_NONE;
wakeup(&periph->ccb_list);
} else if (bp == NULL) {
xpt_release_ccb(start_ccb);
} else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
struct bio *done_bp;
again:
softc->queue_count--;
bioq_remove(&softc->bio_queue, bp);
bp->bio_resid = bp->bio_bcount;
done_bp = bp;
if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
/*
* We now just clear errors in this case
* and let the residual be the notifier.
*/
bp->bio_error = 0;
} else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
/*
* This can only happen if we're reading
* in fixed length mode. In this case,
* we dump the rest of the list the
* same way.
*/
bp->bio_error = 0;
if (bioq_first(&softc->bio_queue) != NULL) {
biodone(done_bp);
goto again;
}
} else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
bp->bio_error = EIO;
bp->bio_flags |= BIO_ERROR;
}
bp = bioq_first(&softc->bio_queue);
/*
* Only if we have no other buffers queued up
* do we clear the pending error flag.
*/
if (bp == NULL)
softc->flags &= ~SA_FLAG_ERR_PENDING;
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("sastart- ERR_PENDING now 0x%x, bp is %sNULL, "
"%d more buffers queued up\n",
(softc->flags & SA_FLAG_ERR_PENDING),
(bp != NULL)? "not " : " ", softc->queue_count));
xpt_release_ccb(start_ccb);
biodone(done_bp);
} else {
u_int32_t length;
bioq_remove(&softc->bio_queue, bp);
softc->queue_count--;
if ((softc->flags & SA_FLAG_FIXED) != 0) {
if (softc->blk_shift != 0) {
length =
bp->bio_bcount >> softc->blk_shift;
} else if (softc->media_blksize != 0) {
length = bp->bio_bcount /
softc->media_blksize;
} else {
bp->bio_error = EIO;
xpt_print(periph->path, "zero blocksize"
" for FIXED length writes?\n");
biodone(bp);
break;
}
#if 0
CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
("issuing a %d fixed record %s\n",
length, (bp->bio_cmd == BIO_READ)? "read" :
"write"));
#endif
} else {
length = bp->bio_bcount;
#if 0
CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
("issuing a %d variable byte %s\n",
length, (bp->bio_cmd == BIO_READ)? "read" :
"write"));
#endif
}
devstat_start_transaction_bio(softc->device_stats, bp);
/*
* Some people have theorized that we should
* suppress illegal length indication if we are
* running in variable block mode so that we don't
* have to request sense every time our requested
* block size is larger than the written block.
* The residual information from the ccb allows
* us to identify this situation anyway. The only
* problem with this is that we will not get
* information about blocks that are larger than
* our read buffer unless we set the block size
* in the mode page to something other than 0.
*
* I believe that this is a non-issue. If user apps
* don't adjust their read size to match our record
* size, that's just life. Anyway, the typical usage
* would be to issue, e.g., 64KB reads and occasionally
* have to do deal with 512 byte or 1KB intermediate
* records.
*/
softc->dsreg = (bp->bio_cmd == BIO_READ)?
MTIO_DSREG_RD : MTIO_DSREG_WR;
scsi_sa_read_write(&start_ccb->csio, 0, sadone,
MSG_SIMPLE_Q_TAG, (bp->bio_cmd == BIO_READ),
FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
length, bp->bio_data, bp->bio_bcount, SSD_FULL_SIZE,
IO_TIMEOUT);
start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
start_ccb->ccb_h.ccb_bp = bp;
bp = bioq_first(&softc->bio_queue);
xpt_action(start_ccb);
}
if (bp != NULL) {
/* Have more work to do, so ensure we stay scheduled */
xpt_schedule(periph, 1);
}
break;
}
case SA_STATE_ABNORMAL:
default:
panic("state 0x%x in sastart", softc->state);
break;
}
}
static void
sadone(struct cam_periph *periph, union ccb *done_ccb)
{
struct sa_softc *softc;
struct ccb_scsiio *csio;
softc = (struct sa_softc *)periph->softc;
csio = &done_ccb->csio;
switch (CCB_Type(csio)) {
case SA_CCB_BUFFER_IO:
{
struct bio *bp;
int error;
softc->dsreg = MTIO_DSREG_REST;
bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
error = 0;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
/*
* A retry was scheduled, so just return.
*/
return;
}
}
if (error == EIO) {
/*
* Catastrophic error. Mark the tape as frozen
* (we no longer know tape position).
*
* Return all queued I/O with EIO, and unfreeze
* our queue so that future transactions that
* attempt to fix this problem can get to the
* device.
*
*/
softc->flags |= SA_FLAG_TAPE_FROZEN;
bioq_flush(&softc->bio_queue, NULL, EIO);
}
if (error != 0) {
bp->bio_resid = bp->bio_bcount;
bp->bio_error = error;
bp->bio_flags |= BIO_ERROR;
/*
* In the error case, position is updated in saerror.
*/
} else {
bp->bio_resid = csio->resid;
bp->bio_error = 0;
if (csio->resid != 0) {
bp->bio_flags |= BIO_ERROR;
}
if (bp->bio_cmd == BIO_WRITE) {
softc->flags |= SA_FLAG_TAPE_WRITTEN;
softc->filemarks = 0;
}
if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
(softc->blkno != (daddr_t) -1)) {
if ((softc->flags & SA_FLAG_FIXED) != 0) {
u_int32_t l;
if (softc->blk_shift != 0) {
l = bp->bio_bcount >>
softc->blk_shift;
} else {
l = bp->bio_bcount /
softc->media_blksize;
}
softc->blkno += (daddr_t) l;
} else {
softc->blkno++;
}
}
}
/*
* If we had an error (immediate or pending),
* release the device queue now.
*/
if (error || (softc->flags & SA_FLAG_ERR_PENDING))
cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
#ifdef CAMDEBUG
if (error || bp->bio_resid) {
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("error %d resid %ld count %ld\n", error,
bp->bio_resid, bp->bio_bcount));
}
#endif
biofinish(bp, softc->device_stats, 0);
break;
}
case SA_CCB_WAITING:
{
/* Caller will release the CCB */
wakeup(&done_ccb->ccb_h.cbfcnp);
return;
}
}
xpt_release_ccb(done_ccb);
}
/*
* Mount the tape (make sure it's ready for I/O).
*/
static int
samount(struct cam_periph *periph, int oflags, struct cdev *dev)
{
struct sa_softc *softc;
union ccb *ccb;
int error;
/*
* oflags can be checked for 'kind' of open (read-only check) - later
* dev can be checked for a control-mode or compression open - later
*/
UNUSED_PARAMETER(oflags);
UNUSED_PARAMETER(dev);
softc = (struct sa_softc *)periph->softc;
/*
* This should determine if something has happend since the last
* open/mount that would invalidate the mount. We do *not* want
* to retry this command- we just want the status. But we only
* do this if we're mounted already- if we're not mounted,
* we don't care about the unit read state and can instead use
* this opportunity to attempt to reserve the tape unit.
*/
if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
ccb = cam_periph_getccb(periph, 1);
scsi_test_unit_ready(&ccb->csio, 0, sadone,
MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
QFRLS(ccb);
if (error == ENXIO) {
softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
scsi_test_unit_ready(&ccb->csio, 0, sadone,
MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
QFRLS(ccb);
} else if (error) {
/*
* We don't need to freeze the tape because we
* will now attempt to rewind/load it.
*/
softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
xpt_print(periph->path,
"error %d on TUR in samount\n", error);
}
}
} else {
error = sareservereleaseunit(periph, TRUE);
if (error) {
return (error);
}
ccb = cam_periph_getccb(periph, 1);
scsi_test_unit_ready(&ccb->csio, 0, sadone,
MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
QFRLS(ccb);
}
if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
struct scsi_read_block_limits_data *rblim = NULL;
int comp_enabled, comp_supported;
u_int8_t write_protect, guessing = 0;
/*
* Clear out old state.
*/
softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
softc->filemarks = 0;
/*
* *Very* first off, make sure we're loaded to BOT.
*/
scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
QFRLS(ccb);
/*
* In case this doesn't work, do a REWIND instead
*/
if (error) {
scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
QFRLS(ccb);
}
if (error) {
xpt_release_ccb(ccb);
goto exit;
}
/*
* Do a dummy test read to force access to the
* media so that the drive will really know what's
* there. We actually don't really care what the
* blocksize on tape is and don't expect to really
* read a full record.
*/
rblim = (struct scsi_read_block_limits_data *)
malloc(8192, M_SCSISA, M_WAITOK);
if (rblim == NULL) {
xpt_print(periph->path, "no memory for test read\n");
xpt_release_ccb(ccb);
error = ENOMEM;
goto exit;
}
if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
scsi_sa_read_write(&ccb->csio, 0, sadone,
MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
(void *) rblim, 8192, SSD_FULL_SIZE,
IO_TIMEOUT);
(void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
QFRLS(ccb);
scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
SF_NO_PRINT | SF_RETRY_UA,
softc->device_stats);
QFRLS(ccb);
if (error) {
xpt_print(periph->path,
"unable to rewind after test read\n");
xpt_release_ccb(ccb);
goto exit;
}
}
/*
* Next off, determine block limits.
*/
scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
SF_NO_PRINT | SF_RETRY_UA, softc->device_stats);
QFRLS(ccb);
xpt_release_ccb(ccb);
if (error != 0) {
/*
* If it's less than SCSI-2, READ BLOCK LIMITS is not
* a MANDATORY command. Anyway- it doesn't matter-
* we can proceed anyway.
*/
softc->blk_gran = 0;
softc->max_blk = ~0;
softc->min_blk = 0;
} else {
if (softc->scsi_rev >= SCSI_REV_SPC) {
softc->blk_gran = RBL_GRAN(rblim);
} else {
softc->blk_gran = 0;
}
/*
* We take max_blk == min_blk to mean a default to
* fixed mode- but note that whatever we get out of
* sagetparams below will actually determine whether
* we are actually *in* fixed mode.
*/
softc->max_blk = scsi_3btoul(rblim->maximum);
softc->min_blk = scsi_2btoul(rblim->minimum);
}
/*
* Next, perform a mode sense to determine
* current density, blocksize, compression etc.
*/
error = sagetparams(periph, SA_PARAM_ALL,
&softc->media_blksize,
&softc->media_density,
&softc->media_numblks,
&softc->buffer_mode, &write_protect,
&softc->speed, &comp_supported,
&comp_enabled, &softc->comp_algorithm,
NULL);
if (error != 0) {
/*
* We could work a little harder here. We could
* adjust our attempts to get information. It
* might be an ancient tape drive. If someone
* nudges us, we'll do that.
*/
goto exit;
}
/*
* If no quirk has determined that this is a device that is
* preferred to be in fixed or variable mode, now is the time
* to find out.
*/
if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
guessing = 1;
/*
* This could be expensive to find out. Luckily we
* only need to do this once. If we start out in
* 'default' mode, try and set ourselves to one
* of the densities that would determine a wad
* of other stuff. Go from highest to lowest.
*/
if (softc->media_density == SCSI_DEFAULT_DENSITY) {
int i;
static u_int8_t ctry[] = {
SCSI_DENSITY_HALFINCH_PE,
SCSI_DENSITY_HALFINCH_6250C,
SCSI_DENSITY_HALFINCH_6250,
SCSI_DENSITY_HALFINCH_1600,
SCSI_DENSITY_HALFINCH_800,
SCSI_DENSITY_QIC_4GB,
SCSI_DENSITY_QIC_2GB,
SCSI_DENSITY_QIC_525_320,
SCSI_DENSITY_QIC_150,
SCSI_DENSITY_QIC_120,
SCSI_DENSITY_QIC_24,
SCSI_DENSITY_QIC_11_9TRK,
SCSI_DENSITY_QIC_11_4TRK,
SCSI_DENSITY_QIC_1320,
SCSI_DENSITY_QIC_3080,
0
};
for (i = 0; ctry[i]; i++) {
error = sasetparams(periph,
SA_PARAM_DENSITY, 0, ctry[i],
0, SF_NO_PRINT);
if (error == 0) {
softc->media_density = ctry[i];
break;
}
}
}
switch (softc->media_density) {
case SCSI_DENSITY_QIC_11_4TRK:
case SCSI_DENSITY_QIC_11_9TRK:
case SCSI_DENSITY_QIC_24:
case SCSI_DENSITY_QIC_120:
case SCSI_DENSITY_QIC_150:
case SCSI_DENSITY_QIC_525_320:
case SCSI_DENSITY_QIC_1320:
case SCSI_DENSITY_QIC_3080:
softc->quirks &= ~SA_QUIRK_2FM;
softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
softc->last_media_blksize = 512;
break;
case SCSI_DENSITY_QIC_4GB:
case SCSI_DENSITY_QIC_2GB:
softc->quirks &= ~SA_QUIRK_2FM;
softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
softc->last_media_blksize = 1024;
break;
default:
softc->last_media_blksize =
softc->media_blksize;
softc->quirks |= SA_QUIRK_VARIABLE;
break;
}
}
/*
* If no quirk has determined that this is a device that needs
* to have 2 Filemarks at EOD, now is the time to find out.
*/
if ((softc->quirks & SA_QUIRK_2FM) == 0) {
switch (softc->media_density) {
case SCSI_DENSITY_HALFINCH_800:
case SCSI_DENSITY_HALFINCH_1600:
case SCSI_DENSITY_HALFINCH_6250:
case SCSI_DENSITY_HALFINCH_6250C:
case SCSI_DENSITY_HALFINCH_PE:
softc->quirks &= ~SA_QUIRK_1FM;
softc->quirks |= SA_QUIRK_2FM;
break;
default:
break;
}
}
/*
* Now validate that some info we got makes sense.
*/
if ((softc->max_blk < softc->media_blksize) ||
(softc->min_blk > softc->media_blksize &&
softc->media_blksize)) {
xpt_print(periph->path,
"BLOCK LIMITS (%d..%d) could not match current "
"block settings (%d)- adjusting\n", softc->min_blk,
softc->max_blk, softc->media_blksize);
softc->max_blk = softc->min_blk =
softc->media_blksize;
}
/*
* Now put ourselves into the right frame of mind based
* upon quirks...
*/
tryagain:
/*
* If we want to be in FIXED mode and our current blocksize
* is not equal to our last blocksize (if nonzero), try and
* set ourselves to this last blocksize (as the 'preferred'
* block size). The initial quirkmatch at registry sets the
* initial 'last' blocksize. If, for whatever reason, this
* 'last' blocksize is zero, set the blocksize to 512,
* or min_blk if that's larger.
*/
if ((softc->quirks & SA_QUIRK_FIXED) &&
(softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
(softc->media_blksize != softc->last_media_blksize)) {
softc->media_blksize = softc->last_media_blksize;
if (softc->media_blksize == 0) {
softc->media_blksize = 512;
if (softc->media_blksize < softc->min_blk) {
softc->media_blksize = softc->min_blk;
}
}
error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
softc->media_blksize, 0, 0, SF_NO_PRINT);
if (error) {
xpt_print(periph->path,
"unable to set fixed blocksize to %d\n",
softc->media_blksize);
goto exit;
}
}
if ((softc->quirks & SA_QUIRK_VARIABLE) &&
(softc->media_blksize != 0)) {
softc->last_media_blksize = softc->media_blksize;
softc->media_blksize = 0;
error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
0, 0, 0, SF_NO_PRINT);
if (error) {
/*
* If this fails and we were guessing, just
* assume that we got it wrong and go try
* fixed block mode. Don't even check against
* density code at this point.
*/
if (guessing) {
softc->quirks &= ~SA_QUIRK_VARIABLE;
softc->quirks |= SA_QUIRK_FIXED;
if (softc->last_media_blksize == 0)
softc->last_media_blksize = 512;
goto tryagain;
}
xpt_print(periph->path,
"unable to set variable blocksize\n");
goto exit;
}
}
/*
* Now that we have the current block size,
* set up some parameters for sastart's usage.
*/
if (softc->media_blksize) {
softc->flags |= SA_FLAG_FIXED;
if (powerof2(softc->media_blksize)) {
softc->blk_shift =
ffs(softc->media_blksize) - 1;
softc->blk_mask = softc->media_blksize - 1;
} else {
softc->blk_mask = ~0;
softc->blk_shift = 0;
}
} else {
/*
* The SCSI-3 spec allows 0 to mean "unspecified".
* The SCSI-1 spec allows 0 to mean 'infinite'.
*
* Either works here.
*/
if (softc->max_blk == 0) {
softc->max_blk = ~0;
}
softc->blk_shift = 0;
if (softc->blk_gran != 0) {
softc->blk_mask = softc->blk_gran - 1;
} else {
softc->blk_mask = 0;
}
}
if (write_protect)
softc->flags |= SA_FLAG_TAPE_WP;
if (comp_supported) {
if (softc->saved_comp_algorithm == 0)
softc->saved_comp_algorithm =
softc->comp_algorithm;
softc->flags |= SA_FLAG_COMP_SUPP;
if (comp_enabled)
softc->flags |= SA_FLAG_COMP_ENABLED;
} else
softc->flags |= SA_FLAG_COMP_UNSUPP;
if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
(softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
0, 0, SF_NO_PRINT);
if (error == 0) {
softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
} else {
xpt_print(periph->path,
"unable to set buffered mode\n");
}
error = 0; /* not an error */
}
if (error == 0) {
softc->flags |= SA_FLAG_TAPE_MOUNTED;
}
exit:
if (rblim != NULL)
free(rblim, M_SCSISA);
if (error != 0) {
softc->dsreg = MTIO_DSREG_NIL;
} else {
softc->fileno = softc->blkno = 0;
softc->dsreg = MTIO_DSREG_REST;
}
#ifdef SA_1FM_AT_EOD
if ((softc->quirks & SA_QUIRK_2FM) == 0)
softc->quirks |= SA_QUIRK_1FM;
#else
if ((softc->quirks & SA_QUIRK_1FM) == 0)
softc->quirks |= SA_QUIRK_2FM;
#endif
} else
xpt_release_ccb(ccb);
/*
* If we return an error, we're not mounted any more,
* so release any device reservation.
*/
if (error != 0) {
(void) sareservereleaseunit(periph, FALSE);
} else {
/*
* Clear I/O residual.
*/
softc->last_io_resid = 0;
softc->last_ctl_resid = 0;
}
return (error);
}
/*
* How many filemarks do we need to write if we were to terminate the
* tape session right now? Note that this can be a negative number
*/
static int
samarkswanted(struct cam_periph *periph)
{
int markswanted;
struct sa_softc *softc;
softc = (struct sa_softc *)periph->softc;
markswanted = 0;
if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
markswanted++;
if (softc->quirks & SA_QUIRK_2FM)
markswanted++;
}
markswanted -= softc->filemarks;
return (markswanted);
}
static int
sacheckeod(struct cam_periph *periph)
{
int error;
int markswanted;
markswanted = samarkswanted(periph);
if (markswanted > 0) {
error = sawritefilemarks(periph, markswanted, FALSE);
} else {
error = 0;
}
return (error);
}
static int
saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
{
static const char *toobig =
"%d-byte tape record bigger than supplied buffer\n";
struct cam_periph *periph;
struct sa_softc *softc;
struct ccb_scsiio *csio;
struct scsi_sense_data *sense;
u_int32_t resid = 0;
int32_t info = 0;
cam_status status;
int error_code, sense_key, asc, ascq, error, aqvalid;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct sa_softc *)periph->softc;
csio = &ccb->csio;
sense = &csio->sense_data;
scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq);
aqvalid = sense->extra_len >= 6;
error = 0;
status = csio->ccb_h.status & CAM_STATUS_MASK;
/*
* Calculate/latch up, any residuals... We do this in a funny 2-step
* so we can print stuff here if we have CAM_DEBUG enabled for this
* unit.
*/
if (status == CAM_SCSI_STATUS_ERROR) {
if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
info = (int32_t) scsi_4btoul(sense->info);
resid = info;
if ((softc->flags & SA_FLAG_FIXED) != 0)
resid *= softc->media_blksize;
} else {
resid = csio->dxfer_len;
info = resid;
if ((softc->flags & SA_FLAG_FIXED) != 0) {
if (softc->media_blksize)
info /= softc->media_blksize;
}
}
if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
sizeof (struct scsi_sense_data));
bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
(int) csio->cdb_len);
softc->last_io_resid = resid;
softc->last_resid_was_io = 1;
} else {
bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
sizeof (struct scsi_sense_data));
bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
(int) csio->cdb_len);
softc->last_ctl_resid = resid;
softc->last_resid_was_io = 0;
}
CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
"ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d "
"dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
sense_key, asc, ascq, status,
sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len));
} else {
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("Cam Status 0x%x\n", status));
}
switch (status) {
case CAM_REQ_CMP:
return (0);
case CAM_SCSI_STATUS_ERROR:
/*
* If a read/write command, we handle it here.
*/
if (CCB_Type(csio) != SA_CCB_WAITING) {
break;
}
/*
* If this was just EOM/EOP, Filemark, Setmark or ILI detected
* on a non read/write command, we assume it's not an error
* and propagate the residule and return.
*/
if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
(aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
csio->resid = resid;
QFRLS(ccb);
return (0);
}
/*
* Otherwise, we let the common code handle this.
*/
return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
/*
* XXX: To Be Fixed
* We cannot depend upon CAM honoring retry counts for these.
*/
case CAM_SCSI_BUS_RESET:
case CAM_BDR_SENT:
if (ccb->ccb_h.retry_count <= 0) {
return (EIO);
}
/* FALLTHROUGH */
default:
return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
}
/*
* Handle filemark, end of tape, mismatched record sizes....
* From this point out, we're only handling read/write cases.
* Handle writes && reads differently.
*/
if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
csio->resid = resid;
error = ENOSPC;
} else if (sense->flags & SSD_EOM) {
softc->flags |= SA_FLAG_EOM_PENDING;
/*
* Grotesque as it seems, the few times
* I've actually seen a non-zero resid,
* the tape drive actually lied and had
* written all the data!.
*/
csio->resid = 0;
}
} else {
csio->resid = resid;
if (sense_key == SSD_KEY_BLANK_CHECK) {
if (softc->quirks & SA_QUIRK_1FM) {
error = 0;
softc->flags |= SA_FLAG_EOM_PENDING;
} else {
error = EIO;
}
} else if (sense->flags & SSD_FILEMARK) {
if (softc->flags & SA_FLAG_FIXED) {
error = -1;
softc->flags |= SA_FLAG_EOF_PENDING;
}
/*
* Unconditionally, if we detected a filemark on a read,
* mark that we've run moved a file ahead.
*/
if (softc->fileno != (daddr_t) -1) {
softc->fileno++;
softc->blkno = 0;
csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
}
}
}
/*
* Incorrect Length usually applies to read, but can apply to writes.
*/
if (error == 0 && (sense->flags & SSD_ILI)) {
if (info < 0) {
xpt_print(csio->ccb_h.path, toobig,
csio->dxfer_len - info);
csio->resid = csio->dxfer_len;
error = EIO;
} else {
csio->resid = resid;
if (softc->flags & SA_FLAG_FIXED) {
softc->flags |= SA_FLAG_EIO_PENDING;
}
/*
* Bump the block number if we hadn't seen a filemark.
* Do this independent of errors (we've moved anyway).
*/
if ((sense->flags & SSD_FILEMARK) == 0) {
if (softc->blkno != (daddr_t) -1) {
softc->blkno++;
csio->ccb_h.ccb_pflags |=
SA_POSITION_UPDATED;
}
}
}
}
if (error <= 0) {
/*
* Unfreeze the queue if frozen as we're not returning anything
* to our waiters that would indicate an I/O error has occurred
* (yet).
*/
QFRLS(ccb);
error = 0;
}
return (error);
}
static int
sagetparams(struct cam_periph *periph, sa_params params_to_get,
u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
sa_comp_t *tcs)
{
union ccb *ccb;
void *mode_buffer;
struct scsi_mode_header_6 *mode_hdr;
struct scsi_mode_blk_desc *mode_blk;
int mode_buffer_len;
struct sa_softc *softc;
u_int8_t cpage;
int error;
cam_status status;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
if (softc->quirks & SA_QUIRK_NO_CPAGE)
cpage = SA_DEVICE_CONFIGURATION_PAGE;
else
cpage = SA_DATA_COMPRESSION_PAGE;
retry:
mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
if (params_to_get & SA_PARAM_COMPRESSION) {
if (softc->quirks & SA_QUIRK_NOCOMP) {
*comp_supported = FALSE;
params_to_get &= ~SA_PARAM_COMPRESSION;
} else
mode_buffer_len += sizeof (sa_comp_t);
}
mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_WAITOK | M_ZERO);
mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
/* it is safe to retry this */
scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
SSD_FULL_SIZE, SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
QFRLS(ccb);
status = ccb->ccb_h.status & CAM_STATUS_MASK;
if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
/*
* Hmm. Let's see if we can try another page...
* If we've already done that, give up on compression
* for this device and remember this for the future
* and attempt the request without asking for compression
* info.
*/
if (cpage == SA_DATA_COMPRESSION_PAGE) {
cpage = SA_DEVICE_CONFIGURATION_PAGE;
goto retry;
}
softc->quirks |= SA_QUIRK_NOCOMP;
free(mode_buffer, M_SCSISA);
goto retry;
} else if (status == CAM_SCSI_STATUS_ERROR) {
/* Tell the user about the fatal error. */
scsi_sense_print(&ccb->csio);
goto sagetparamsexit;
}
/*
* If the user only wants the compression information, and
* the device doesn't send back the block descriptor, it's
* no big deal. If the user wants more than just
* compression, though, and the device doesn't pass back the
* block descriptor, we need to send another mode sense to
* get the block descriptor.
*/
if ((mode_hdr->blk_desc_len == 0) &&
(params_to_get & SA_PARAM_COMPRESSION) &&
(params_to_get & ~(SA_PARAM_COMPRESSION))) {
/*
* Decrease the mode buffer length by the size of
* the compression page, to make sure the data
* there doesn't get overwritten.
*/
mode_buffer_len -= sizeof (sa_comp_t);
/*
* Now move the compression page that we presumably
* got back down the memory chunk a little bit so
* it doesn't get spammed.
*/
bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
/*
* Now, we issue another mode sense and just ask
* for the block descriptor, etc.
*/
scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
QFRLS(ccb);
if (error != 0)
goto sagetparamsexit;
}
if (params_to_get & SA_PARAM_BLOCKSIZE)
*blocksize = scsi_3btoul(mode_blk->blklen);
if (params_to_get & SA_PARAM_NUMBLOCKS)
*numblocks = scsi_3btoul(mode_blk->nblocks);
if (params_to_get & SA_PARAM_BUFF_MODE)
*buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
if (params_to_get & SA_PARAM_DENSITY)
*density = mode_blk->density;
if (params_to_get & SA_PARAM_WP)
*write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
if (params_to_get & SA_PARAM_SPEED)
*speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
if (params_to_get & SA_PARAM_COMPRESSION) {
sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
if (cpage == SA_DATA_COMPRESSION_PAGE) {
struct scsi_data_compression_page *cp = &ntcs->dcomp;
*comp_supported =
(cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
*comp_enabled =
(cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
*comp_algorithm = scsi_4btoul(cp->comp_algorithm);
} else {
struct scsi_dev_conf_page *cp = &ntcs->dconf;
/*
* We don't really know whether this device supports
* Data Compression if the the algorithm field is
* zero. Just say we do.
*/
*comp_supported = TRUE;
*comp_enabled =
(cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
*comp_algorithm = cp->sel_comp_alg;
}
if (tcs != NULL)
bcopy(ntcs, tcs, sizeof (sa_comp_t));
}
if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
int idx;
char *xyz = mode_buffer;
xpt_print_path(periph->path);
printf("Mode Sense Data=");
for (idx = 0; idx < mode_buffer_len; idx++)
printf(" 0x%02x", xyz[idx] & 0xff);
printf("\n");
}
sagetparamsexit:
xpt_release_ccb(ccb);
free(mode_buffer, M_SCSISA);
return (error);
}
/*
* The purpose of this function is to set one of four different parameters
* for a tape drive:
* - blocksize
* - density
* - compression / compression algorithm
* - buffering mode
*
* The assumption is that this will be called from saioctl(), and therefore
* from a process context. Thus the waiting malloc calls below. If that
* assumption ever changes, the malloc calls should be changed to be
* NOWAIT mallocs.
*
* Any or all of the four parameters may be set when this function is
* called. It should handle setting more than one parameter at once.
*/
static int
sasetparams(struct cam_periph *periph, sa_params params_to_set,
u_int32_t blocksize, u_int8_t density, u_int32_t calg,
u_int32_t sense_flags)
{
struct sa_softc *softc;
u_int32_t current_blocksize;
u_int32_t current_calg;
u_int8_t current_density;
u_int8_t current_speed;
int comp_enabled, comp_supported;
void *mode_buffer;
int mode_buffer_len;
struct scsi_mode_header_6 *mode_hdr;
struct scsi_mode_blk_desc *mode_blk;
sa_comp_t *ccomp, *cpage;
int buff_mode;
union ccb *ccb = NULL;
int error;
softc = (struct sa_softc *)periph->softc;
ccomp = malloc(sizeof (sa_comp_t), M_SCSISA, M_WAITOK);
/*
* Since it doesn't make sense to set the number of blocks, or
* write protection, we won't try to get the current value. We
* always want to get the blocksize, so we can set it back to the
* proper value.
*/
error = sagetparams(periph,
params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
&current_blocksize, &current_density, NULL, &buff_mode, NULL,
&current_speed, &comp_supported, &comp_enabled,
&current_calg, ccomp);
if (error != 0) {
free(ccomp, M_SCSISA);
return (error);
}
mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
if (params_to_set & SA_PARAM_COMPRESSION)
mode_buffer_len += sizeof (sa_comp_t);
mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_WAITOK | M_ZERO);
mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
ccb = cam_periph_getccb(periph, 1);
retry:
if (params_to_set & SA_PARAM_COMPRESSION) {
if (mode_blk) {
cpage = (sa_comp_t *)&mode_blk[1];
} else {
cpage = (sa_comp_t *)&mode_hdr[1];
}
bcopy(ccomp, cpage, sizeof (sa_comp_t));
cpage->hdr.pagecode &= ~0x80;
} else
cpage = NULL;
/*
* If the caller wants us to set the blocksize, use the one they
* pass in. Otherwise, use the blocksize we got back from the
* mode select above.
*/
if (mode_blk) {
if (params_to_set & SA_PARAM_BLOCKSIZE)
scsi_ulto3b(blocksize, mode_blk->blklen);
else
scsi_ulto3b(current_blocksize, mode_blk->blklen);
/*
* Set density if requested, else preserve old density.
* SCSI_SAME_DENSITY only applies to SCSI-2 or better
* devices, else density we've latched up in our softc.
*/
if (params_to_set & SA_PARAM_DENSITY) {
mode_blk->density = density;
} else if (softc->scsi_rev > SCSI_REV_CCS) {
mode_blk->density = SCSI_SAME_DENSITY;
} else {
mode_blk->density = softc->media_density;
}
}
/*
* For mode selects, these two fields must be zero.
*/
mode_hdr->data_length = 0;
mode_hdr->medium_type = 0;
/* set the speed to the current value */
mode_hdr->dev_spec = current_speed;
/* if set, set single-initiator buffering mode */
if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
}
if (mode_blk)
mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
else
mode_hdr->blk_desc_len = 0;
/*
* First, if the user wants us to set the compression algorithm or
* just turn compression on, check to make sure that this drive
* supports compression.
*/
if (params_to_set & SA_PARAM_COMPRESSION) {
/*
* If the compression algorithm is 0, disable compression.
* If the compression algorithm is non-zero, enable
* compression and set the compression type to the
* specified compression algorithm, unless the algorithm is
* MT_COMP_ENABLE. In that case, we look at the
* compression algorithm that is currently set and if it is
* non-zero, we leave it as-is. If it is zero, and we have
* saved a compression algorithm from a time when
* compression was enabled before, set the compression to
* the saved value.
*/
switch (ccomp->hdr.pagecode & ~0x80) {
case SA_DEVICE_CONFIGURATION_PAGE:
{
struct scsi_dev_conf_page *dcp = &cpage->dconf;
if (calg == 0) {
dcp->sel_comp_alg = SA_COMP_NONE;
break;
}
if (calg != MT_COMP_ENABLE) {
dcp->sel_comp_alg = calg;
} else if (dcp->sel_comp_alg == SA_COMP_NONE &&
softc->saved_comp_algorithm != 0) {
dcp->sel_comp_alg = softc->saved_comp_algorithm;
}
break;
}
case SA_DATA_COMPRESSION_PAGE:
if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
struct scsi_data_compression_page *dcp = &cpage->dcomp;
if (calg == 0) {
/*
* Disable compression, but leave the
* decompression and the capability bit
* alone.
*/
dcp->dce_and_dcc = SA_DCP_DCC;
dcp->dde_and_red |= SA_DCP_DDE;
break;
}
/* enable compression && decompression */
dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
dcp->dde_and_red |= SA_DCP_DDE;
/*
* If there, use compression algorithm from caller.
* Otherwise, if there's a saved compression algorithm
* and there is no current algorithm, use the saved
* algorithm. Else parrot back what we got and hope
* for the best.
*/
if (calg != MT_COMP_ENABLE) {
scsi_ulto4b(calg, dcp->comp_algorithm);
scsi_ulto4b(calg, dcp->decomp_algorithm);
} else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
softc->saved_comp_algorithm != 0) {
scsi_ulto4b(softc->saved_comp_algorithm,
dcp->comp_algorithm);
scsi_ulto4b(softc->saved_comp_algorithm,
dcp->decomp_algorithm);
}
break;
}
/*
* Compression does not appear to be supported-
* at least via the DATA COMPRESSION page. It
* would be too much to ask us to believe that
* the page itself is supported, but incorrectly
* reports an ability to manipulate data compression,
* so we'll assume that this device doesn't support
* compression. We can just fall through for that.
*/
/* FALLTHROUGH */
default:
/*
* The drive doesn't seem to support compression,
* so turn off the set compression bit.
*/
params_to_set &= ~SA_PARAM_COMPRESSION;
xpt_print(periph->path,
"device does not seem to support compression\n");
/*
* If that was the only thing the user wanted us to set,
* clean up allocated resources and return with
* 'operation not supported'.
*/
if (params_to_set == SA_PARAM_NONE) {
free(mode_buffer, M_SCSISA);
xpt_release_ccb(ccb);
return (ENODEV);
}
/*
* That wasn't the only thing the user wanted us to set.
* So, decrease the stated mode buffer length by the
* size of the compression mode page.
*/
mode_buffer_len -= sizeof(sa_comp_t);
}
}
/* It is safe to retry this operation */
scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
(params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0,
sense_flags, softc->device_stats);
QFRLS(ccb);
if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
int idx;
char *xyz = mode_buffer;
xpt_print_path(periph->path);
printf("Err%d, Mode Select Data=", error);
for (idx = 0; idx < mode_buffer_len; idx++)
printf(" 0x%02x", xyz[idx] & 0xff);
printf("\n");
}
if (error) {
/*
* If we can, try without setting density/blocksize.
*/
if (mode_blk) {
if ((params_to_set &
(SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
mode_blk = NULL;
goto retry;
}
} else {
mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
cpage = (sa_comp_t *)&mode_blk[1];
}
/*
* If we were setting the blocksize, and that failed, we
* want to set it to its original value. If we weren't
* setting the blocksize, we don't want to change it.
*/
scsi_ulto3b(current_blocksize, mode_blk->blklen);
/*
* Set density if requested, else preserve old density.
* SCSI_SAME_DENSITY only applies to SCSI-2 or better
* devices, else density we've latched up in our softc.
*/
if (params_to_set & SA_PARAM_DENSITY) {
mode_blk->density = current_density;
} else if (softc->scsi_rev > SCSI_REV_CCS) {
mode_blk->density = SCSI_SAME_DENSITY;
} else {
mode_blk->density = softc->media_density;
}
if (params_to_set & SA_PARAM_COMPRESSION)
bcopy(ccomp, cpage, sizeof (sa_comp_t));
/*
* The retry count is the only CCB field that might have been
* changed that we care about, so reset it back to 1.
*/
ccb->ccb_h.retry_count = 1;
cam_periph_runccb(ccb, saerror, 0, sense_flags,
softc->device_stats);
QFRLS(ccb);
}
xpt_release_ccb(ccb);
if (ccomp != NULL)
free(ccomp, M_SCSISA);
if (params_to_set & SA_PARAM_COMPRESSION) {
if (error) {
softc->flags &= ~SA_FLAG_COMP_ENABLED;
/*
* Even if we get an error setting compression,
* do not say that we don't support it. We could
* have been wrong, or it may be media specific.
* softc->flags &= ~SA_FLAG_COMP_SUPP;
*/
softc->saved_comp_algorithm = softc->comp_algorithm;
softc->comp_algorithm = 0;
} else {
softc->flags |= SA_FLAG_COMP_ENABLED;
softc->comp_algorithm = calg;
}
}
free(mode_buffer, M_SCSISA);
return (error);
}
static void
saprevent(struct cam_periph *periph, int action)
{
struct sa_softc *softc;
union ccb *ccb;
int error, sf;
softc = (struct sa_softc *)periph->softc;
if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
return;
if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
return;
/*
* We can be quiet about illegal requests.
*/
if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
sf = 0;
} else
sf = SF_QUIET_IR;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
SSD_FULL_SIZE, SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, sf, softc->device_stats);
QFRLS(ccb);
if (error == 0) {
if (action == PR_ALLOW)
softc->flags &= ~SA_FLAG_TAPE_LOCKED;
else
softc->flags |= SA_FLAG_TAPE_LOCKED;
}
xpt_release_ccb(ccb);
}
static int
sarewind(struct cam_periph *periph)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
SSD_FULL_SIZE, REWIND_TIMEOUT);
softc->dsreg = MTIO_DSREG_REW;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
xpt_release_ccb(ccb);
if (error == 0)
softc->fileno = softc->blkno = (daddr_t) 0;
else
softc->fileno = softc->blkno = (daddr_t) -1;
return (error);
}
static int
saspace(struct cam_periph *periph, int count, scsi_space_code code)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* This cannot be retried */
scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
SSD_FULL_SIZE, SPACE_TIMEOUT);
/*
* Clear residual because we will be using it.
*/
softc->last_ctl_resid = 0;
softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
xpt_release_ccb(ccb);
/*
* If a spacing operation has failed, we need to invalidate
* this mount.
*
* If the spacing operation was setmarks or to end of recorded data,
* we no longer know our relative position.
*
* If the spacing operations was spacing files in reverse, we
* take account of the residual, but still check against less
* than zero- if we've gone negative, we must have hit BOT.
*
* If the spacing operations was spacing records in reverse and
* we have a residual, we've either hit BOT or hit a filemark.
* In the former case, we know our new record number (0). In
* the latter case, we have absolutely no idea what the real
* record number is- we've stopped between the end of the last
* record in the previous file and the filemark that stopped
* our spacing backwards.
*/
if (error) {
softc->fileno = softc->blkno = (daddr_t) -1;
} else if (code == SS_SETMARKS || code == SS_EOD) {
softc->fileno = softc->blkno = (daddr_t) -1;
} else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
softc->fileno += (count - softc->last_ctl_resid);
if (softc->fileno < 0) /* we must of hit BOT */
softc->fileno = 0;
softc->blkno = 0;
} else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
softc->blkno += (count - softc->last_ctl_resid);
if (count < 0) {
if (softc->last_ctl_resid || softc->blkno < 0) {
if (softc->fileno == 0) {
softc->blkno = 0;
} else {
softc->blkno = (daddr_t) -1;
}
}
}
}
return (error);
}
static int
sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
{
union ccb *ccb;
struct sa_softc *softc;
int error, nwm = 0;
softc = (struct sa_softc *)periph->softc;
if (softc->open_rdonly)
return (EBADF);
ccb = cam_periph_getccb(periph, 1);
/*
* Clear residual because we will be using it.
*/
softc->last_ctl_resid = 0;
softc->dsreg = MTIO_DSREG_FMK;
/* this *must* not be retried */
scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
softc->dsreg = MTIO_DSREG_REST;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
if (error == 0 && nmarks) {
struct sa_softc *softc = (struct sa_softc *)periph->softc;
nwm = nmarks - softc->last_ctl_resid;
softc->filemarks += nwm;
}
xpt_release_ccb(ccb);
/*
* Update relative positions (if we're doing that).
*/
if (error) {
softc->fileno = softc->blkno = (daddr_t) -1;
} else if (softc->fileno != (daddr_t) -1) {
softc->fileno += nwm;
softc->blkno = 0;
}
return (error);
}
static int
sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
{
struct scsi_tape_position_data loc;
union ccb *ccb;
struct sa_softc *softc = (struct sa_softc *)periph->softc;
int error;
/*
* We try and flush any buffered writes here if we were writing
* and we're trying to get hardware block position. It eats
* up performance substantially, but I'm wary of drive firmware.
*
* I think that *logical* block position is probably okay-
* but hardware block position might have to wait for data
* to hit media to be valid. Caveat Emptor.
*/
if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
error = sawritefilemarks(periph, 0, 0);
if (error && error != EACCES)
return (error);
}
ccb = cam_periph_getccb(periph, 1);
scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
softc->dsreg = MTIO_DSREG_RBSY;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
if (error == 0) {
if (loc.flags & SA_RPOS_UNCERTAIN) {
error = EINVAL; /* nothing is certain */
} else {
*blkptr = scsi_4btoul(loc.firstblk);
}
}
xpt_release_ccb(ccb);
return (error);
}
static int
sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
/*
* We used to try and flush any buffered writes here.
* Now we push this onto user applications to either
* flush the pending writes themselves (via a zero count
* WRITE FILEMARKS command) or they can trust their tape
* drive to do this correctly for them.
*/
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
softc->dsreg = MTIO_DSREG_POS;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
xpt_release_ccb(ccb);
/*
* Note relative file && block number position as now unknown.
*/
softc->fileno = softc->blkno = (daddr_t) -1;
return (error);
}
static int
saretension(struct cam_periph *periph)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
FALSE, TRUE, TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
softc->dsreg = MTIO_DSREG_TEN;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
xpt_release_ccb(ccb);
if (error == 0)
softc->fileno = softc->blkno = (daddr_t) 0;
else
softc->fileno = softc->blkno = (daddr_t) -1;
return (error);
}
static int
sareservereleaseunit(struct cam_periph *periph, int reserve)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
FALSE, 0, SSD_FULL_SIZE, SCSIOP_TIMEOUT, reserve);
softc->dsreg = MTIO_DSREG_RBSY;
error = cam_periph_runccb(ccb, saerror, 0,
SF_RETRY_UA | SF_NO_PRINT, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
QFRLS(ccb);
xpt_release_ccb(ccb);
/*
* If the error was Illegal Request, then the device doesn't support
* RESERVE/RELEASE. This is not an error.
*/
if (error == EINVAL) {
error = 0;
}
return (error);
}
static int
saloadunload(struct cam_periph *periph, int load)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
QFRLS(ccb);
xpt_release_ccb(ccb);
if (error || load == 0)
softc->fileno = softc->blkno = (daddr_t) -1;
else if (error == 0)
softc->fileno = softc->blkno = (daddr_t) 0;
return (error);
}
static int
saerase(struct cam_periph *periph, int longerase)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
if (softc->open_rdonly)
return (EBADF);
ccb = cam_periph_getccb(periph, 1);
scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
SSD_FULL_SIZE, ERASE_TIMEOUT);
softc->dsreg = MTIO_DSREG_ZER;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
xpt_release_ccb(ccb);
return (error);
}
#endif /* _KERNEL */
/*
* Read tape block limits command.
*/
void
scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action,
struct scsi_read_block_limits_data *rlimit_buf,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_read_block_limits *scsi_cmd;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
(u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
sizeof(*scsi_cmd), timeout);
scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = READ_BLOCK_LIMITS;
}
void
scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int readop, int sli,
int fixed, u_int32_t length, u_int8_t *data_ptr,
u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_sa_rw *scsi_cmd;
scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
scsi_cmd->sli_fixed = 0;
if (sli && readop)
scsi_cmd->sli_fixed |= SAR_SLI;
if (fixed)
scsi_cmd->sli_fixed |= SARW_FIXED;
scsi_ulto3b(length, scsi_cmd->length);
scsi_cmd->control = 0;
cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
tag_action, data_ptr, dxfer_len, sense_len,
sizeof(*scsi_cmd), timeout);
}
void
scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immediate, int eot,
int reten, int load, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_load_unload *scsi_cmd;
scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = LOAD_UNLOAD;
if (immediate)
scsi_cmd->immediate = SLU_IMMED;
if (eot)
scsi_cmd->eot_reten_load |= SLU_EOT;
if (reten)
scsi_cmd->eot_reten_load |= SLU_RETEN;
if (load)
scsi_cmd->eot_reten_load |= SLU_LOAD;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
}
void
scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immediate, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_rewind *scsi_cmd;
scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = REWIND;
if (immediate)
scsi_cmd->immediate = SREW_IMMED;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
void
scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, scsi_space_code code,
u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_space *scsi_cmd;
scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
scsi_cmd->opcode = SPACE;
scsi_cmd->code = code;
scsi_ulto3b(count, scsi_cmd->count);
scsi_cmd->control = 0;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
void
scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immediate, int setmark,
u_int32_t num_marks, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_write_filemarks *scsi_cmd;
scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = WRITE_FILEMARKS;
if (immediate)
scsi_cmd->byte2 |= SWFMRK_IMMED;
if (setmark)
scsi_cmd->byte2 |= SWFMRK_WSMK;
scsi_ulto3b(num_marks, scsi_cmd->num_marks);
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
/*
* The reserve and release unit commands differ only by their opcodes.
*/
void
scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int third_party,
int third_party_id, u_int8_t sense_len,
u_int32_t timeout, int reserve)
{
struct scsi_reserve_release_unit *scsi_cmd;
scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
if (reserve)
scsi_cmd->opcode = RESERVE_UNIT;
else
scsi_cmd->opcode = RELEASE_UNIT;
if (third_party) {
scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
scsi_cmd->lun_thirdparty |=
((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
}
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
void
scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immediate, int long_erase,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_erase *scsi_cmd;
scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = ERASE;
if (immediate)
scsi_cmd->lun_imm_long |= SE_IMMED;
if (long_erase)
scsi_cmd->lun_imm_long |= SE_LONG;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
/*
* Read Tape Position command.
*/
void
scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int hardsoft,
struct scsi_tape_position_data *sbp,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_tape_read_position *scmd;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
(u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
bzero(scmd, sizeof(*scmd));
scmd->opcode = READ_POSITION;
scmd->byte1 = hardsoft;
}
/*
* Set Tape Position command.
*/
void
scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int hardsoft, u_int32_t blkno,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_tape_locate *scmd;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
(u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
bzero(scmd, sizeof(*scmd));
scmd->opcode = LOCATE;
if (hardsoft)
scmd->byte1 |= SA_SPOS_BT;
scsi_ulto4b(blkno, scmd->blkaddr);
}
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