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freebsd-dev/sys/cam/scsi/scsi_ch.c
Alexander Motin 227d67aa54 Merge CAM locking changes from the projects/camlock branch to radically 
reduce lock congestion and improve SMP scalability of the SCSI/ATA stack,
preparing the ground for the coming next GEOM direct dispatch support.

Replace big per-SIM locks with bunch of smaller ones:
 - per-LUN locks to protect device and peripheral drivers state;
 - per-target locks to protect list of LUNs on target;
 - per-bus locks to protect reference counting;
 - per-send queue locks to protect queue of CCBs to be sent;
 - per-done queue locks to protect queue of completed CCBs;
 - remaining per-SIM locks now protect only HBA driver internals.

While holding LUN lock it is allowed (while not recommended for performance
reasons) to take SIM lock.  The opposite acquisition order is forbidden.
All the other locks are leaf locks, that can be taken anywhere, but should
not be cascaded.  Many functions, such as: xpt_action(), xpt_done(),
xpt_async(), xpt_create_path(), etc. are no longer require (but allow) SIM
lock to be held.

To keep compatibility and solve cases where SIM lock can't be dropped, all
xpt_async() calls in addition to xpt_done() calls are queued to completion
threads for async processing in clean environment without SIM lock held.

Instead of single CAM SWI thread, used for commands completion processing
before, use multiple (depending on number of CPUs) threads.  Load balanced
between them using "hash" of the device B:T:L address.

HBA drivers that can drop SIM lock during completion processing and have
sufficient number of completion threads to efficiently scale to multiple
CPUs can use new function xpt_done_direct() to avoid extra context switch.
Make ahci(4) driver to use this mechanism depending on hardware setup.

Sponsored by:	iXsystems, Inc.
MFC after:	2 months
2013-10-21 12:00:26 +00:00

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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_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;
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 */
softc->dev = make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
GID_OPERATOR, 0600, "%s%d", periph->periph_name,
periph->unit_number);
cam_periph_lock(periph);
softc->dev->si_drv1 = periph;
/*
* 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;
if (periph == NULL)
return(ENXIO);
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
} 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 scheuled, so
* just return.
*/
return;
} else if (error != 0) {
int retry_scheduled;
struct scsi_mode_sense_6 *sms;
sms = (struct scsi_mode_sense_6 *)
done_ccb->csio.cdb_io.cdb_bytes;
/*
* 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) {
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 ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
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);
announce_buf[0] = '\0';
}
}
if (announce_buf[0] != '\0') {
xpt_announce_periph(periph, announce_buf);
xpt_announce_quirks(periph, softc->quirks,
CH_Q_BIT_STRING);
}
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;
if (periph == NULL)
return(ENXIO);
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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