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freebsd-skq/sys/cam/scsi/scsi_ch.c
pfg 0edb0feb11 chdone(): Prevent returning uninitialized scalar value. 
Improve over the solution in r297527:
Instead of attempting to initialize all the possible cases, just
move the check nearer to the case where it makes sense.

CID:		1006486
Reviewed by:	ken
MFC after:	2 weeks
2016-04-07 21:33:14 +00:00

1940 lines
51 KiB
C
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/*-
* Copyright (c) 1997 Justin T. Gibbs.
* Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
* 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.
*/
/*
* Derived from the NetBSD SCSI changer driver.
*
* $NetBSD: ch.c,v 1.32 1998/01/12 09:49:12 thorpej Exp $
*
*/
/*-
* Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
* All rights reserved.
*
* Partially based on an autochanger driver written by Stefan Grefen
* and on an autochanger driver written by the Systems Programming Group
* at the University of Utah Computer Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed by Jason R. Thorpe
* for And Communications, http://www.and.com/
* 4. 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 ``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 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>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/chio.h>
#include <sys/errno.h>
#include <sys/devicestat.h>
#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_ch.h>
/*
* Timeout definitions for various changer related commands. They may
* be too short for some devices (especially the timeout for INITIALIZE
* ELEMENT STATUS).
*/
static const u_int32_t CH_TIMEOUT_MODE_SENSE = 6000;
static const u_int32_t CH_TIMEOUT_MOVE_MEDIUM = 15 * 60 * 1000;
static const u_int32_t CH_TIMEOUT_EXCHANGE_MEDIUM = 15 * 60 * 1000;
static const u_int32_t CH_TIMEOUT_POSITION_TO_ELEMENT = 15 * 60 * 1000;
static const u_int32_t CH_TIMEOUT_READ_ELEMENT_STATUS = 5 * 60 * 1000;
static const u_int32_t CH_TIMEOUT_SEND_VOLTAG = 10000;
static const u_int32_t CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
typedef enum {
CH_FLAG_INVALID = 0x001
} ch_flags;
typedef enum {
CH_STATE_PROBE,
CH_STATE_NORMAL
} ch_state;
typedef enum {
CH_CCB_PROBE
} ch_ccb_types;
typedef enum {
CH_Q_NONE = 0x00,
CH_Q_NO_DBD = 0x01,
CH_Q_NO_DVCID = 0x02
} ch_quirks;
#define CH_Q_BIT_STRING \
"\020" \
"\001NO_DBD" \
"\002NO_DVCID"
#define ccb_state ppriv_field0
#define ccb_bp ppriv_ptr1
struct scsi_mode_sense_data {
struct scsi_mode_header_6 header;
struct scsi_mode_blk_desc blk_desc;
union {
struct page_element_address_assignment ea;
struct page_transport_geometry_parameters tg;
struct page_device_capabilities cap;
} pages;
};
struct ch_softc {
ch_flags flags;
ch_state state;
ch_quirks quirks;
union ccb saved_ccb;
struct devstat *device_stats;
struct cdev *dev;
int open_count;
int sc_picker; /* current picker */
/*
* The following information is obtained from the
* element address assignment page.
*/
int sc_firsts[CHET_MAX + 1]; /* firsts */
int sc_counts[CHET_MAX + 1]; /* counts */
/*
* The following mask defines the legal combinations
* of elements for the MOVE MEDIUM command.
*/
u_int8_t sc_movemask[CHET_MAX + 1];
/*
* As above, but for EXCHANGE MEDIUM.
*/
u_int8_t sc_exchangemask[CHET_MAX + 1];
/*
* Quirks; see below. XXX KDM not implemented yet
*/
int sc_settledelay; /* delay for settle */
};
static d_open_t chopen;
static d_close_t chclose;
static d_ioctl_t chioctl;
static periph_init_t chinit;
static periph_ctor_t chregister;
static periph_oninv_t choninvalidate;
static periph_dtor_t chcleanup;
static periph_start_t chstart;
static void chasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg);
static void chdone(struct cam_periph *periph,
union ccb *done_ccb);
static int cherror(union ccb *ccb, u_int32_t cam_flags,
u_int32_t sense_flags);
static int chmove(struct cam_periph *periph,
struct changer_move *cm);
static int chexchange(struct cam_periph *periph,
struct changer_exchange *ce);
static int chposition(struct cam_periph *periph,
struct changer_position *cp);
static int chgetelemstatus(struct cam_periph *periph,
int scsi_version, u_long cmd,
struct changer_element_status_request *csr);
static int chsetvoltag(struct cam_periph *periph,
struct changer_set_voltag_request *csvr);
static int chielem(struct cam_periph *periph,
unsigned int timeout);
static int chgetparams(struct cam_periph *periph);
static int chscsiversion(struct cam_periph *periph);
static struct periph_driver chdriver =
{
chinit, "ch",
TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
};
PERIPHDRIVER_DECLARE(ch, chdriver);
static struct cdevsw ch_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_TRACKCLOSE,
.d_open = chopen,
.d_close = chclose,
.d_ioctl = chioctl,
.d_name = "ch",
};
static MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
static void
chinit(void)
{
cam_status status;
/*
* Install a global async callback. This callback will
* receive async callbacks like "new device found".
*/
status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
if (status != CAM_REQ_CMP) {
printf("ch: Failed to attach master async callback "
"due to status 0x%x!\n", status);
}
}
static void
chdevgonecb(void *arg)
{
struct ch_softc *softc;
struct cam_periph *periph;
struct mtx *mtx;
int i;
periph = (struct cam_periph *)arg;
mtx = cam_periph_mtx(periph);
mtx_lock(mtx);
softc = (struct ch_softc *)periph->softc;
KASSERT(softc->open_count >= 0, ("Negative open count %d",
softc->open_count));
/*
* When we get this callback, we will get no more close calls from
* devfs. So if we have any dangling opens, we need to release the
* reference held for that particular context.
*/
for (i = 0; i < softc->open_count; i++)
cam_periph_release_locked(periph);
softc->open_count = 0;
/*
* Release the reference held for the device node, it is gone now.
*/
cam_periph_release_locked(periph);
/*
* We reference the lock directly here, instead of using
* cam_periph_unlock(). The reason is that the final call to
* cam_periph_release_locked() above could result in the periph
* getting freed. If that is the case, dereferencing the periph
* with a cam_periph_unlock() call would cause a page fault.
*/
mtx_unlock(mtx);
}
static void
choninvalidate(struct cam_periph *periph)
{
struct ch_softc *softc;
softc = (struct ch_softc *)periph->softc;
/*
* De-register any async callbacks.
*/
xpt_register_async(0, chasync, periph, periph->path);
softc->flags |= CH_FLAG_INVALID;
/*
* Tell devfs this device has gone away, and ask for a callback
* when it has cleaned up its state.
*/
destroy_dev_sched_cb(softc->dev, chdevgonecb, periph);
}
static void
chcleanup(struct cam_periph *periph)
{
struct ch_softc *softc;
softc = (struct ch_softc *)periph->softc;
devstat_remove_entry(softc->device_stats);
free(softc, M_DEVBUF);
}
static void
chasync(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 (cgd->protocol != PROTO_SCSI)
break;
if (SID_QUAL(&cgd->inq_data) != SID_QUAL_LU_CONNECTED)
break;
if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
break;
/*
* Allocate a peripheral instance for
* this device and start the probe
* process.
*/
status = cam_periph_alloc(chregister, choninvalidate,
chcleanup, chstart, "ch",
CAM_PERIPH_BIO, path,
chasync, AC_FOUND_DEVICE, cgd);
if (status != CAM_REQ_CMP
&& status != CAM_REQ_INPROG)
printf("chasync: 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
chregister(struct cam_periph *periph, void *arg)
{
struct ch_softc *softc;
struct ccb_getdev *cgd;
struct ccb_pathinq cpi;
struct make_dev_args args;
int error;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL) {
printf("chregister: no getdev CCB, can't register device\n");
return(CAM_REQ_CMP_ERR);
}
softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
if (softc == NULL) {
printf("chregister: Unable to probe new device. "
"Unable to allocate softc\n");
return(CAM_REQ_CMP_ERR);
}
bzero(softc, sizeof(*softc));
softc->state = CH_STATE_PROBE;
periph->softc = softc;
softc->quirks = CH_Q_NONE;
/*
* The DVCID and CURDATA bits were not introduced until the SMC
* spec. If this device claims SCSI-2 or earlier support, then it
* very likely does not support these bits.
*/
if (cgd->inq_data.version <= SCSI_REV_2)
softc->quirks |= CH_Q_NO_DVCID;
bzero(&cpi, sizeof(cpi));
xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
cpi.ccb_h.func_code = XPT_PATH_INQ;
xpt_action((union ccb *)&cpi);
/*
* Changers don't have a blocksize, and obviously don't support
* tagged queueing.
*/
cam_periph_unlock(periph);
softc->device_stats = devstat_new_entry("ch",
periph->unit_number, 0,
DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
SID_TYPE(&cgd->inq_data) |
XPORT_DEVSTAT_TYPE(cpi.transport),
DEVSTAT_PRIORITY_OTHER);
/*
* Acquire a reference to the periph before we create the devfs
* instance for it. We'll release this reference once the devfs
* instance has been freed.
*/
if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
xpt_print(periph->path, "%s: lost periph during "
"registration!\n", __func__);
cam_periph_lock(periph);
return (CAM_REQ_CMP_ERR);
}
/* Register the device */
make_dev_args_init(&args);
args.mda_devsw = &ch_cdevsw;
args.mda_unit = periph->unit_number;
args.mda_uid = UID_ROOT;
args.mda_gid = GID_OPERATOR;
args.mda_mode = 0600;
args.mda_si_drv1 = periph;
error = make_dev_s(&args, &softc->dev, "%s%d", periph->periph_name,
periph->unit_number);
cam_periph_lock(periph);
if (error != 0) {
cam_periph_release_locked(periph);
return (CAM_REQ_CMP_ERR);
}
/*
* Add an async callback so that we get
* notified if this device goes away.
*/
xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
/*
* Lock this periph until we are setup.
* This first call can't block
*/
(void)cam_periph_hold(periph, PRIBIO);
xpt_schedule(periph, CAM_PRIORITY_DEV);
return(CAM_REQ_CMP);
}
static int
chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
{
struct cam_periph *periph;
struct ch_softc *softc;
int error;
periph = (struct cam_periph *)dev->si_drv1;
if (cam_periph_acquire(periph) != CAM_REQ_CMP)
return (ENXIO);
softc = (struct ch_softc *)periph->softc;
cam_periph_lock(periph);
if (softc->flags & CH_FLAG_INVALID) {
cam_periph_release_locked(periph);
cam_periph_unlock(periph);
return(ENXIO);
}
if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
cam_periph_unlock(periph);
cam_periph_release(periph);
return (error);
}
/*
* Load information about this changer device into the softc.
*/
if ((error = chgetparams(periph)) != 0) {
cam_periph_unhold(periph);
cam_periph_release_locked(periph);
cam_periph_unlock(periph);
return(error);
}
cam_periph_unhold(periph);
softc->open_count++;
cam_periph_unlock(periph);
return(error);
}
static int
chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
{
struct cam_periph *periph;
struct ch_softc *softc;
struct mtx *mtx;
periph = (struct cam_periph *)dev->si_drv1;
mtx = cam_periph_mtx(periph);
mtx_lock(mtx);
softc = (struct ch_softc *)periph->softc;
softc->open_count--;
cam_periph_release_locked(periph);
/*
* We reference the lock directly here, instead of using
* cam_periph_unlock(). The reason is that the call to
* cam_periph_release_locked() above could result in the periph
* getting freed. If that is the case, dereferencing the periph
* with a cam_periph_unlock() call would cause a page fault.
*
* cam_periph_release() avoids this problem using the same method,
* but we're manually acquiring and dropping the lock here to
* protect the open count and avoid another lock acquisition and
* release.
*/
mtx_unlock(mtx);
return(0);
}
static void
chstart(struct cam_periph *periph, union ccb *start_ccb)
{
struct ch_softc *softc;
softc = (struct ch_softc *)periph->softc;
switch (softc->state) {
case CH_STATE_NORMAL:
{
xpt_release_ccb(start_ccb);
break;
}
case CH_STATE_PROBE:
{
int mode_buffer_len;
void *mode_buffer;
/*
* Include the block descriptor when calculating the mode
* buffer length,
*/
mode_buffer_len = sizeof(struct scsi_mode_header_6) +
sizeof(struct scsi_mode_blk_desc) +
sizeof(struct page_element_address_assignment);
mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
if (mode_buffer == NULL) {
printf("chstart: couldn't malloc mode sense data\n");
break;
}
bzero(mode_buffer, mode_buffer_len);
/*
* Get the element address assignment page.
*/
scsi_mode_sense(&start_ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
FALSE : TRUE,
/* page_code */ SMS_PAGE_CTRL_CURRENT,
/* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
/* param_buf */ (u_int8_t *)mode_buffer,
/* param_len */ mode_buffer_len,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_MODE_SENSE);
start_ccb->ccb_h.ccb_bp = NULL;
start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
xpt_action(start_ccb);
break;
}
}
}
static void
chdone(struct cam_periph *periph, union ccb *done_ccb)
{
struct ch_softc *softc;
struct ccb_scsiio *csio;
softc = (struct ch_softc *)periph->softc;
csio = &done_ccb->csio;
switch(done_ccb->ccb_h.ccb_state) {
case CH_CCB_PROBE:
{
struct scsi_mode_header_6 *mode_header;
struct page_element_address_assignment *ea;
char announce_buf[80];
mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
ea = (struct page_element_address_assignment *)
find_mode_page_6(mode_header);
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
softc->sc_picker = softc->sc_firsts[CHET_MT];
#define PLURAL(c) (c) == 1 ? "" : "s"
snprintf(announce_buf, sizeof(announce_buf),
"%d slot%s, %d drive%s, "
"%d picker%s, %d portal%s",
softc->sc_counts[CHET_ST],
PLURAL(softc->sc_counts[CHET_ST]),
softc->sc_counts[CHET_DT],
PLURAL(softc->sc_counts[CHET_DT]),
softc->sc_counts[CHET_MT],
PLURAL(softc->sc_counts[CHET_MT]),
softc->sc_counts[CHET_IE],
PLURAL(softc->sc_counts[CHET_IE]));
#undef PLURAL
if (announce_buf[0] != '\0') {
xpt_announce_periph(periph, announce_buf);
xpt_announce_quirks(periph, softc->quirks,
CH_Q_BIT_STRING);
}
} else {
int error;
error = cherror(done_ccb, CAM_RETRY_SELTO,
SF_RETRY_UA | SF_NO_PRINT);
/*
* Retry any UNIT ATTENTION type errors. They
* are expected at boot.
*/
if (error == ERESTART) {
/*
* A retry was scheduled, so
* just return.
*/
return;
} else if (error != 0) {
struct scsi_mode_sense_6 *sms;
int frozen, retry_scheduled;
sms = (struct scsi_mode_sense_6 *)
done_ccb->csio.cdb_io.cdb_bytes;
frozen = (done_ccb->ccb_h.status &
CAM_DEV_QFRZN) != 0;
/*
* Check to see if block descriptors were
* disabled. Some devices don't like that.
* We're taking advantage of the fact that
* the first few bytes of the 6 and 10 byte
* mode sense commands are the same. If
* block descriptors were disabled, enable
* them and re-send the command.
*/
if ((sms->byte2 & SMS_DBD) != 0 &&
(periph->flags & CAM_PERIPH_INVALID) == 0) {
sms->byte2 &= ~SMS_DBD;
xpt_action(done_ccb);
softc->quirks |= CH_Q_NO_DBD;
retry_scheduled = 1;
} else
retry_scheduled = 0;
/* Don't wedge this device's queue */
if (frozen)
cam_release_devq(done_ccb->ccb_h.path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
if (retry_scheduled)
return;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
== CAM_SCSI_STATUS_ERROR)
scsi_sense_print(&done_ccb->csio);
else {
xpt_print(periph->path,
"got CAM status %#x\n",
done_ccb->ccb_h.status);
}
xpt_print(periph->path, "fatal error, failed "
"to attach to device\n");
cam_periph_invalidate(periph);
}
}
softc->state = CH_STATE_NORMAL;
free(mode_header, M_SCSICH);
/*
* Since our peripheral may be invalidated by an error
* above or an external event, we must release our CCB
* before releasing the probe lock on the peripheral.
* The peripheral will only go away once the last lock
* is removed, and we need it around for the CCB release
* operation.
*/
xpt_release_ccb(done_ccb);
cam_periph_unhold(periph);
return;
}
default:
break;
}
xpt_release_ccb(done_ccb);
}
static int
cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
{
struct ch_softc *softc;
struct cam_periph *periph;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct ch_softc *)periph->softc;
return (cam_periph_error(ccb, cam_flags, sense_flags,
&softc->saved_ccb));
}
static int
chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
{
struct cam_periph *periph;
struct ch_softc *softc;
int error;
periph = (struct cam_periph *)dev->si_drv1;
cam_periph_lock(periph);
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
softc = (struct ch_softc *)periph->softc;
error = 0;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
("trying to do ioctl %#lx\n", cmd));
/*
* If this command can change the device's state, we must
* have the device open for writing.
*/
switch (cmd) {
case CHIOGPICKER:
case CHIOGPARAMS:
case OCHIOGSTATUS:
case CHIOGSTATUS:
break;
default:
if ((flag & FWRITE) == 0) {
cam_periph_unlock(periph);
return (EBADF);
}
}
switch (cmd) {
case CHIOMOVE:
error = chmove(periph, (struct changer_move *)addr);
break;
case CHIOEXCHANGE:
error = chexchange(periph, (struct changer_exchange *)addr);
break;
case CHIOPOSITION:
error = chposition(periph, (struct changer_position *)addr);
break;
case CHIOGPICKER:
*(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
break;
case CHIOSPICKER:
{
int new_picker = *(int *)addr;
if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
error = EINVAL;
break;
}
softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
break;
}
case CHIOGPARAMS:
{
struct changer_params *cp = (struct changer_params *)addr;
cp->cp_npickers = softc->sc_counts[CHET_MT];
cp->cp_nslots = softc->sc_counts[CHET_ST];
cp->cp_nportals = softc->sc_counts[CHET_IE];
cp->cp_ndrives = softc->sc_counts[CHET_DT];
break;
}
case CHIOIELEM:
error = chielem(periph, *(unsigned int *)addr);
break;
case OCHIOGSTATUS:
{
error = chgetelemstatus(periph, SCSI_REV_2, cmd,
(struct changer_element_status_request *)addr);
break;
}
case CHIOGSTATUS:
{
int scsi_version;
scsi_version = chscsiversion(periph);
if (scsi_version >= SCSI_REV_0) {
error = chgetelemstatus(periph, scsi_version, cmd,
(struct changer_element_status_request *)addr);
}
else { /* unable to determine the SCSI version */
cam_periph_unlock(periph);
return (ENXIO);
}
break;
}
case CHIOSETVOLTAG:
{
error = chsetvoltag(periph,
(struct changer_set_voltag_request *) addr);
break;
}
/* Implement prevent/allow? */
default:
error = cam_periph_ioctl(periph, cmd, addr, cherror);
break;
}
cam_periph_unlock(periph);
return (error);
}
static int
chmove(struct cam_periph *periph, struct changer_move *cm)
{
struct ch_softc *softc;
u_int16_t fromelem, toelem;
union ccb *ccb;
int error;
error = 0;
softc = (struct ch_softc *)periph->softc;
/*
* Check arguments.
*/
if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
return (EINVAL);
if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
(cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
return (ENODEV);
/*
* Check the request against the changer's capabilities.
*/
if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
return (ENODEV);
/*
* Calculate the source and destination elements.
*/
fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
scsi_move_medium(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* tea */ softc->sc_picker,
/* src */ fromelem,
/* dst */ toelem,
/* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
/*sense_flags*/ SF_RETRY_UA,
softc->device_stats);
xpt_release_ccb(ccb);
return(error);
}
static int
chexchange(struct cam_periph *periph, struct changer_exchange *ce)
{
struct ch_softc *softc;
u_int16_t src, dst1, dst2;
union ccb *ccb;
int error;
error = 0;
softc = (struct ch_softc *)periph->softc;
/*
* Check arguments.
*/
if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
(ce->ce_sdsttype > CHET_DT))
return (EINVAL);
if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
(ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
(ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
return (ENODEV);
/*
* Check the request against the changer's capabilities.
*/
if (((softc->sc_exchangemask[ce->ce_srctype] &
(1 << ce->ce_fdsttype)) == 0) ||
((softc->sc_exchangemask[ce->ce_fdsttype] &
(1 << ce->ce_sdsttype)) == 0))
return (ENODEV);
/*
* Calculate the source and destination elements.
*/
src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
scsi_exchange_medium(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* tea */ softc->sc_picker,
/* src */ src,
/* dst1 */ dst1,
/* dst2 */ dst2,
/* invert1 */ (ce->ce_flags & CE_INVERT1) ?
TRUE : FALSE,
/* invert2 */ (ce->ce_flags & CE_INVERT2) ?
TRUE : FALSE,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
/*sense_flags*/ SF_RETRY_UA,
softc->device_stats);
xpt_release_ccb(ccb);
return(error);
}
static int
chposition(struct cam_periph *periph, struct changer_position *cp)
{
struct ch_softc *softc;
u_int16_t dst;
union ccb *ccb;
int error;
error = 0;
softc = (struct ch_softc *)periph->softc;
/*
* Check arguments.
*/
if (cp->cp_type > CHET_DT)
return (EINVAL);
if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
return (ENODEV);
/*
* Calculate the destination element.
*/
dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
scsi_position_to_element(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* tea */ softc->sc_picker,
/* dst */ dst,
/* invert */ (cp->cp_flags & CP_INVERT) ?
TRUE : FALSE,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
/*sense_flags*/ SF_RETRY_UA,
softc->device_stats);
xpt_release_ccb(ccb);
return(error);
}
/*
* Copy a volume tag to a volume_tag struct, converting SCSI byte order
* to host native byte order in the volume serial number. The volume
* label as returned by the changer is transferred to user mode as
* nul-terminated string. Volume labels are truncated at the first
* space, as suggested by SCSI-2.
*/
static void
copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
{
int i;
for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
char c = voltag->vif[i];
if (c && c != ' ')
uvoltag->cv_volid[i] = c;
else
break;
}
uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
}
/*
* Copy an element status descriptor to a user-mode
* changer_element_status structure.
*/
static void
copy_element_status(struct ch_softc *softc,
u_int16_t flags,
struct read_element_status_descriptor *desc,
struct changer_element_status *ces,
int scsi_version)
{
u_int16_t eaddr = scsi_2btoul(desc->eaddr);
u_int16_t et;
struct volume_tag *pvol_tag = NULL, *avol_tag = NULL;
struct read_element_status_device_id *devid = NULL;
ces->ces_int_addr = eaddr;
/* set up logical address in element status */
for (et = CHET_MT; et <= CHET_DT; et++) {
if ((softc->sc_firsts[et] <= eaddr)
&& ((softc->sc_firsts[et] + softc->sc_counts[et])
> eaddr)) {
ces->ces_addr = eaddr - softc->sc_firsts[et];
ces->ces_type = et;
break;
}
}
ces->ces_flags = desc->flags1;
ces->ces_sensecode = desc->sense_code;
ces->ces_sensequal = desc->sense_qual;
if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
ces->ces_flags |= CES_INVERT;
if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
eaddr = scsi_2btoul(desc->ssea);
/* convert source address to logical format */
for (et = CHET_MT; et <= CHET_DT; et++) {
if ((softc->sc_firsts[et] <= eaddr)
&& ((softc->sc_firsts[et] + softc->sc_counts[et])
> eaddr)) {
ces->ces_source_addr =
eaddr - softc->sc_firsts[et];
ces->ces_source_type = et;
ces->ces_flags |= CES_SOURCE_VALID;
break;
}
}
if (!(ces->ces_flags & CES_SOURCE_VALID))
printf("ch: warning: could not map element source "
"address %ud to a valid element type\n",
eaddr);
}
/*
* pvoltag and avoltag are common between SCSI-2 and later versions
*/
if (flags & READ_ELEMENT_STATUS_PVOLTAG)
pvol_tag = &desc->voltag_devid.pvoltag;
if (flags & READ_ELEMENT_STATUS_AVOLTAG)
avol_tag = (flags & READ_ELEMENT_STATUS_PVOLTAG) ?
&desc->voltag_devid.voltag[1] :&desc->voltag_devid.pvoltag;
/*
* For SCSI-3 and later, element status can carry designator and
* other information.
*/
if (scsi_version >= SCSI_REV_SPC) {
if ((flags & READ_ELEMENT_STATUS_PVOLTAG) ^
(flags & READ_ELEMENT_STATUS_AVOLTAG))
devid = &desc->voltag_devid.pvol_and_devid.devid;
else if (!(flags & READ_ELEMENT_STATUS_PVOLTAG) &&
!(flags & READ_ELEMENT_STATUS_AVOLTAG))
devid = &desc->voltag_devid.devid;
else /* Have both PVOLTAG and AVOLTAG */
devid = &desc->voltag_devid.vol_tags_and_devid.devid;
}
if (pvol_tag)
copy_voltag(&(ces->ces_pvoltag), pvol_tag);
if (avol_tag)
copy_voltag(&(ces->ces_pvoltag), avol_tag);
if (devid != NULL) {
if (devid->designator_length > 0) {
bcopy((void *)devid->designator,
(void *)ces->ces_designator,
devid->designator_length);
ces->ces_designator_length = devid->designator_length;
/*
* Make sure we are always NUL terminated. The
* This won't matter for the binary code set,
* since the user will only pay attention to the
* length field.
*/
ces->ces_designator[devid->designator_length]= '\0';
}
if (devid->piv_assoc_designator_type &
READ_ELEMENT_STATUS_PIV_SET) {
ces->ces_flags |= CES_PIV;
ces->ces_protocol_id =
READ_ELEMENT_STATUS_PROTOCOL_ID(
devid->prot_code_set);
}
ces->ces_code_set =
READ_ELEMENT_STATUS_CODE_SET(devid->prot_code_set);
ces->ces_assoc = READ_ELEMENT_STATUS_ASSOCIATION(
devid->piv_assoc_designator_type);
ces->ces_designator_type = READ_ELEMENT_STATUS_DESIGNATOR_TYPE(
devid->piv_assoc_designator_type);
} else if (scsi_version > SCSI_REV_2) {
/* SCSI-SPC and No devid, no designator */
ces->ces_designator_length = 0;
ces->ces_designator[0] = '\0';
ces->ces_protocol_id = CES_PROTOCOL_ID_FCP_4;
}
if (scsi_version <= SCSI_REV_2) {
if (desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
READ_ELEMENT_STATUS_DT_IDVALID) {
ces->ces_flags |= CES_SCSIID_VALID;
ces->ces_scsi_id =
desc->dt_or_obsolete.scsi_2.dt_scsi_addr;
}
if (desc->dt_or_obsolete.scsi_2.dt_scsi_addr &
READ_ELEMENT_STATUS_DT_LUVALID) {
ces->ces_flags |= CES_LUN_VALID;
ces->ces_scsi_lun =
desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
READ_ELEMENT_STATUS_DT_LUNMASK;
}
}
}
static int
chgetelemstatus(struct cam_periph *periph, int scsi_version, u_long cmd,
struct changer_element_status_request *cesr)
{
struct read_element_status_header *st_hdr;
struct read_element_status_page_header *pg_hdr;
struct read_element_status_descriptor *desc;
caddr_t data = NULL;
size_t size, desclen;
int avail, i, error = 0;
int curdata, dvcid, sense_flags;
int try_no_dvcid = 0;
struct changer_element_status *user_data = NULL;
struct ch_softc *softc;
union ccb *ccb;
int chet = cesr->cesr_element_type;
int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
softc = (struct ch_softc *)periph->softc;
/* perform argument checking */
/*
* Perform a range check on the cesr_element_{base,count}
* request argument fields.
*/
if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
|| (cesr->cesr_element_base + cesr->cesr_element_count)
> softc->sc_counts[chet])
return (EINVAL);
/*
* Request one descriptor for the given element type. This
* is used to determine the size of the descriptor so that
* we can allocate enough storage for all of them. We assume
* that the first one can fit into 1k.
*/
cam_periph_unlock(periph);
data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
cam_periph_lock(periph);
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
sense_flags = SF_RETRY_UA;
if (softc->quirks & CH_Q_NO_DVCID) {
dvcid = 0;
curdata = 0;
} else {
dvcid = 1;
curdata = 1;
/*
* Don't print anything for an Illegal Request, because
* these flags can cause some changers to complain. We'll
* retry without them if we get an error.
*/
sense_flags |= SF_QUIET_IR;
}
retry_einval:
scsi_read_element_status(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* voltag */ want_voltags,
/* sea */ softc->sc_firsts[chet],
/* curdata */ curdata,
/* dvcid */ dvcid,
/* count */ 1,
/* data_ptr */ data,
/* dxfer_len */ 1024,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
/*sense_flags*/ sense_flags,
softc->device_stats);
/*
* An Illegal Request sense key (only used if there is no asc/ascq)
* or 0x24,0x00 for an ASC/ASCQ both map to EINVAL. If dvcid or
* curdata are set (we set both or neither), try turning them off
* and see if the command is successful.
*/
if ((error == EINVAL)
&& (dvcid || curdata)) {
dvcid = 0;
curdata = 0;
error = 0;
/* At this point we want to report any Illegal Request */
sense_flags &= ~SF_QUIET_IR;
try_no_dvcid = 1;
goto retry_einval;
}
/*
* In this case, we tried a read element status with dvcid and
* curdata set, and it failed. We retried without those bits, and
* it succeeded. Suggest to the user that he set a quirk, so we
* don't go through the retry process the first time in the future.
* This should only happen on changers that claim SCSI-3 or higher,
* but don't support these bits.
*/
if ((try_no_dvcid != 0)
&& (error == 0))
softc->quirks |= CH_Q_NO_DVCID;
if (error)
goto done;
cam_periph_unlock(periph);
st_hdr = (struct read_element_status_header *)data;
pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
sizeof(struct read_element_status_header));
desclen = scsi_2btoul(pg_hdr->edl);
size = sizeof(struct read_element_status_header) +
sizeof(struct read_element_status_page_header) +
(desclen * cesr->cesr_element_count);
/*
* Reallocate storage for descriptors and get them from the
* device.
*/
free(data, M_DEVBUF);
data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
cam_periph_lock(periph);
scsi_read_element_status(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* voltag */ want_voltags,
/* sea */ softc->sc_firsts[chet]
+ cesr->cesr_element_base,
/* curdata */ curdata,
/* dvcid */ dvcid,
/* count */ cesr->cesr_element_count,
/* data_ptr */ data,
/* dxfer_len */ size,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
/*sense_flags*/ SF_RETRY_UA,
softc->device_stats);
if (error)
goto done;
cam_periph_unlock(periph);
/*
* Fill in the user status array.
*/
st_hdr = (struct read_element_status_header *)data;
pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
sizeof(struct read_element_status_header));
avail = scsi_2btoul(st_hdr->count);
if (avail != cesr->cesr_element_count) {
xpt_print(periph->path,
"warning, READ ELEMENT STATUS avail != count\n");
}
user_data = (struct changer_element_status *)
malloc(avail * sizeof(struct changer_element_status),
M_DEVBUF, M_WAITOK | M_ZERO);
desc = (struct read_element_status_descriptor *)((uintptr_t)data +
sizeof(struct read_element_status_header) +
sizeof(struct read_element_status_page_header));
/*
* Set up the individual element status structures
*/
for (i = 0; i < avail; ++i) {
struct changer_element_status *ces;
/*
* In the changer_element_status structure, fields from
* the beginning to the field of ces_scsi_lun are common
* between SCSI-2 and SCSI-3, while all the rest are new
* from SCSI-3. In order to maintain backward compatibility
* of the chio command, the ces pointer, below, is computed
* such that it lines up with the structure boundary
* corresponding to the SCSI version.
*/
ces = cmd == OCHIOGSTATUS ?
(struct changer_element_status *)
((unsigned char *)user_data + i *
(offsetof(struct changer_element_status,ces_scsi_lun)+1)):
&user_data[i];
copy_element_status(softc, pg_hdr->flags, desc,
ces, scsi_version);
desc = (struct read_element_status_descriptor *)
((unsigned char *)desc + desclen);
}
/* Copy element status structures out to userspace. */
if (cmd == OCHIOGSTATUS)
error = copyout(user_data,
cesr->cesr_element_status,
avail* (offsetof(struct changer_element_status,
ces_scsi_lun) + 1));
else
error = copyout(user_data,
cesr->cesr_element_status,
avail * sizeof(struct changer_element_status));
cam_periph_lock(periph);
done:
xpt_release_ccb(ccb);
if (data != NULL)
free(data, M_DEVBUF);
if (user_data != NULL)
free(user_data, M_DEVBUF);
return (error);
}
static int
chielem(struct cam_periph *periph,
unsigned int timeout)
{
union ccb *ccb;
struct ch_softc *softc;
int error;
if (!timeout) {
timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
} else {
timeout *= 1000;
}
error = 0;
softc = (struct ch_softc *)periph->softc;
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
scsi_initialize_element_status(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ timeout);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
/*sense_flags*/ SF_RETRY_UA,
softc->device_stats);
xpt_release_ccb(ccb);
return(error);
}
static int
chsetvoltag(struct cam_periph *periph,
struct changer_set_voltag_request *csvr)
{
union ccb *ccb;
struct ch_softc *softc;
u_int16_t ea;
u_int8_t sac;
struct scsi_send_volume_tag_parameters ssvtp;
int error;
int i;
error = 0;
softc = (struct ch_softc *)periph->softc;
bzero(&ssvtp, sizeof(ssvtp));
for (i=0; i<sizeof(ssvtp.vitf); i++) {
ssvtp.vitf[i] = ' ';
}
/*
* Check arguments.
*/
if (csvr->csvr_type > CHET_DT)
return EINVAL;
if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
return ENODEV;
ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
if (csvr->csvr_flags & CSVR_ALTERNATE) {
switch (csvr->csvr_flags & CSVR_MODE_MASK) {
case CSVR_MODE_SET:
sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
break;
case CSVR_MODE_REPLACE:
sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
break;
case CSVR_MODE_CLEAR:
sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
break;
default:
error = EINVAL;
goto out;
}
} else {
switch (csvr->csvr_flags & CSVR_MODE_MASK) {
case CSVR_MODE_SET:
sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
break;
case CSVR_MODE_REPLACE:
sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
break;
case CSVR_MODE_CLEAR:
sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
break;
default:
error = EINVAL;
goto out;
}
}
memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
scsi_send_volume_tag(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* element_address */ ea,
/* send_action_code */ sac,
/* parameters */ &ssvtp,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_SEND_VOLTAG);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
/*sense_flags*/ SF_RETRY_UA,
softc->device_stats);
xpt_release_ccb(ccb);
out:
return error;
}
static int
chgetparams(struct cam_periph *periph)
{
union ccb *ccb;
struct ch_softc *softc;
void *mode_buffer;
int mode_buffer_len;
struct page_element_address_assignment *ea;
struct page_device_capabilities *cap;
int error, from, dbd;
u_int8_t *moves, *exchanges;
error = 0;
softc = (struct ch_softc *)periph->softc;
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
/*
* The scsi_mode_sense_data structure is just a convenience
* structure that allows us to easily calculate the worst-case
* storage size of the mode sense buffer.
*/
mode_buffer_len = sizeof(struct scsi_mode_sense_data);
mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
if (mode_buffer == NULL) {
printf("chgetparams: couldn't malloc mode sense data\n");
return(ENOSPC);
}
bzero(mode_buffer, mode_buffer_len);
if (softc->quirks & CH_Q_NO_DBD)
dbd = FALSE;
else
dbd = TRUE;
/*
* Get the element address assignment page.
*/
scsi_mode_sense(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* dbd */ dbd,
/* page_code */ SMS_PAGE_CTRL_CURRENT,
/* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
/* param_buf */ (u_int8_t *)mode_buffer,
/* param_len */ mode_buffer_len,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_MODE_SENSE);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
/* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
softc->device_stats);
if (error) {
if (dbd) {
struct scsi_mode_sense_6 *sms;
sms = (struct scsi_mode_sense_6 *)
ccb->csio.cdb_io.cdb_bytes;
sms->byte2 &= ~SMS_DBD;
error = cam_periph_runccb(ccb, cherror,
/*cam_flags*/ CAM_RETRY_SELTO,
/*sense_flags*/ SF_RETRY_UA,
softc->device_stats);
} else {
/*
* Since we disabled sense printing above, print
* out the sense here since we got an error.
*/
scsi_sense_print(&ccb->csio);
}
if (error) {
xpt_print(periph->path,
"chgetparams: error getting element "
"address page\n");
xpt_release_ccb(ccb);
free(mode_buffer, M_SCSICH);
return(error);
}
}
ea = (struct page_element_address_assignment *)
find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
bzero(mode_buffer, mode_buffer_len);
/*
* Now get the device capabilities page.
*/
scsi_mode_sense(&ccb->csio,
/* retries */ 1,
/* cbfcnp */ chdone,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* dbd */ dbd,
/* page_code */ SMS_PAGE_CTRL_CURRENT,
/* page */ CH_DEVICE_CAP_PAGE,
/* param_buf */ (u_int8_t *)mode_buffer,
/* param_len */ mode_buffer_len,
/* sense_len */ SSD_FULL_SIZE,
/* timeout */ CH_TIMEOUT_MODE_SENSE);
error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
/* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
softc->device_stats);
if (error) {
if (dbd) {
struct scsi_mode_sense_6 *sms;
sms = (struct scsi_mode_sense_6 *)
ccb->csio.cdb_io.cdb_bytes;
sms->byte2 &= ~SMS_DBD;
error = cam_periph_runccb(ccb, cherror,
/*cam_flags*/ CAM_RETRY_SELTO,
/*sense_flags*/ SF_RETRY_UA,
softc->device_stats);
} else {
/*
* Since we disabled sense printing above, print
* out the sense here since we got an error.
*/
scsi_sense_print(&ccb->csio);
}
if (error) {
xpt_print(periph->path,
"chgetparams: error getting device "
"capabilities page\n");
xpt_release_ccb(ccb);
free(mode_buffer, M_SCSICH);
return(error);
}
}
xpt_release_ccb(ccb);
cap = (struct page_device_capabilities *)
find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
moves = cap->move_from;
exchanges = cap->exchange_with;
for (from = CHET_MT; from <= CHET_MAX; ++from) {
softc->sc_movemask[from] = moves[from];
softc->sc_exchangemask[from] = exchanges[from];
}
free(mode_buffer, M_SCSICH);
return(error);
}
static int
chscsiversion(struct cam_periph *periph)
{
struct scsi_inquiry_data *inq_data;
struct ccb_getdev *cgd;
int dev_scsi_version;
cam_periph_assert(periph, MA_OWNED);
if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) == NULL)
return (-1);
/*
* Get the device information.
*/
xpt_setup_ccb(&cgd->ccb_h,
periph->path,
CAM_PRIORITY_NORMAL);
cgd->ccb_h.func_code = XPT_GDEV_TYPE;
xpt_action((union ccb *)cgd);
if (cgd->ccb_h.status != CAM_REQ_CMP) {
xpt_free_ccb((union ccb *)cgd);
return -1;
}
inq_data = &cgd->inq_data;
dev_scsi_version = inq_data->version;
xpt_free_ccb((union ccb *)cgd);
return dev_scsi_version;
}
void
scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, u_int32_t tea, u_int32_t src,
u_int32_t dst, int invert, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_move_medium *scsi_cmd;
scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = MOVE_MEDIUM;
scsi_ulto2b(tea, scsi_cmd->tea);
scsi_ulto2b(src, scsi_cmd->src);
scsi_ulto2b(dst, scsi_cmd->dst);
if (invert)
scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/ CAM_DIR_NONE,
tag_action,
/*data_ptr*/ NULL,
/*dxfer_len*/ 0,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
void
scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, u_int32_t tea, u_int32_t src,
u_int32_t dst1, u_int32_t dst2, int invert1,
int invert2, u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_exchange_medium *scsi_cmd;
scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = EXCHANGE_MEDIUM;
scsi_ulto2b(tea, scsi_cmd->tea);
scsi_ulto2b(src, scsi_cmd->src);
scsi_ulto2b(dst1, scsi_cmd->fdst);
scsi_ulto2b(dst2, scsi_cmd->sdst);
if (invert1)
scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
if (invert2)
scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/ CAM_DIR_NONE,
tag_action,
/*data_ptr*/ NULL,
/*dxfer_len*/ 0,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
void
scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
int invert, u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_position_to_element *scsi_cmd;
scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = POSITION_TO_ELEMENT;
scsi_ulto2b(tea, scsi_cmd->tea);
scsi_ulto2b(dst, scsi_cmd->dst);
if (invert)
scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/ CAM_DIR_NONE,
tag_action,
/*data_ptr*/ NULL,
/*dxfer_len*/ 0,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
void
scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int voltag, u_int32_t sea,
int curdata, int dvcid,
u_int32_t count, u_int8_t *data_ptr,
u_int32_t dxfer_len, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_read_element_status *scsi_cmd;
scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = READ_ELEMENT_STATUS;
scsi_ulto2b(sea, scsi_cmd->sea);
scsi_ulto2b(count, scsi_cmd->count);
scsi_ulto3b(dxfer_len, scsi_cmd->len);
if (dvcid)
scsi_cmd->flags |= READ_ELEMENT_STATUS_DVCID;
if (curdata)
scsi_cmd->flags |= READ_ELEMENT_STATUS_CURDATA;
if (voltag)
scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/ CAM_DIR_IN,
tag_action,
data_ptr,
dxfer_len,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
void
scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_initialize_element_status *scsi_cmd;
scsi_cmd = (struct scsi_initialize_element_status *)
&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/ CAM_DIR_NONE,
tag_action,
/* data_ptr */ NULL,
/* dxfer_len */ 0,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
void
scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action,
u_int16_t element_address,
u_int8_t send_action_code,
struct scsi_send_volume_tag_parameters *parameters,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_send_volume_tag *scsi_cmd;
scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = SEND_VOLUME_TAG;
scsi_ulto2b(element_address, scsi_cmd->ea);
scsi_cmd->sac = send_action_code;
scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/ CAM_DIR_OUT,
tag_action,
/* data_ptr */ (u_int8_t *) parameters,
sizeof(*parameters),
sense_len,
sizeof(*scsi_cmd),
timeout);
}
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