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freebsd-skq/sys/cam/scsi/scsi_enc.c

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/*-
* Copyright (c) 2000 Matthew Jacob
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/sbuf.h>
#include <sys/sx.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <machine/stdarg.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_debug.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_enc.h>
#include <cam/scsi/scsi_enc_internal.h>
#include "opt_ses.h"
MALLOC_DEFINE(M_SCSIENC, "SCSI ENC", "SCSI ENC buffers");
/* Enclosure type independent driver */
static d_open_t enc_open;
static d_close_t enc_close;
static d_ioctl_t enc_ioctl;
static periph_init_t enc_init;
static periph_ctor_t enc_ctor;
static periph_oninv_t enc_oninvalidate;
static periph_dtor_t enc_dtor;
static void enc_async(void *, uint32_t, struct cam_path *, void *);
static enctyp enc_type(struct ccb_getdev *);
SYSCTL_NODE(_kern_cam, OID_AUTO, enc, CTLFLAG_RD, 0,
"CAM Enclosure Services driver");
static struct periph_driver encdriver = {
enc_init, "ses",
TAILQ_HEAD_INITIALIZER(encdriver.units), /* generation */ 0
};
PERIPHDRIVER_DECLARE(enc, encdriver);
static struct cdevsw enc_cdevsw = {
.d_version = D_VERSION,
.d_open = enc_open,
.d_close = enc_close,
.d_ioctl = enc_ioctl,
.d_name = "ses",
.d_flags = D_TRACKCLOSE,
};
static void
enc_init(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, enc_async, NULL, NULL);
if (status != CAM_REQ_CMP) {
printf("enc: Failed to attach master async callback "
"due to status 0x%x!\n", status);
}
}
static void
enc_devgonecb(void *arg)
{
struct cam_periph *periph;
struct enc_softc *enc;
struct mtx *mtx;
int i;
periph = (struct cam_periph *)arg;
mtx = cam_periph_mtx(periph);
mtx_lock(mtx);
enc = (struct enc_softc *)periph->softc;
/*
* 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 < enc->open_count; i++)
cam_periph_release_locked(periph);
enc->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
enc_oninvalidate(struct cam_periph *periph)
{
struct enc_softc *enc;
enc = periph->softc;
enc->enc_flags |= ENC_FLAG_INVALID;
/* If the sub-driver has an invalidate routine, call it */
if (enc->enc_vec.softc_invalidate != NULL)
enc->enc_vec.softc_invalidate(enc);
/*
* Unregister any async callbacks.
*/
xpt_register_async(0, enc_async, periph, periph->path);
/*
* Shutdown our daemon.
*/
enc->enc_flags |= ENC_FLAG_SHUTDOWN;
if (enc->enc_daemon != NULL) {
/* Signal the ses daemon to terminate. */
wakeup(enc->enc_daemon);
}
callout_drain(&enc->status_updater);
destroy_dev_sched_cb(enc->enc_dev, enc_devgonecb, periph);
}
static void
enc_dtor(struct cam_periph *periph)
{
struct enc_softc *enc;
enc = periph->softc;
/* If the sub-driver has a cleanup routine, call it */
if (enc->enc_vec.softc_cleanup != NULL)
enc->enc_vec.softc_cleanup(enc);
if (enc->enc_boot_hold_ch.ich_func != NULL) {
config_intrhook_disestablish(&enc->enc_boot_hold_ch);
enc->enc_boot_hold_ch.ich_func = NULL;
}
ENC_FREE(enc);
}
static void
enc_async(void *callback_arg, uint32_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;
path_id_t path_id;
cgd = (struct ccb_getdev *)arg;
if (arg == NULL) {
break;
}
if (enc_type(cgd) == ENC_NONE) {
/*
* Schedule announcement of the ENC bindings for
* this device if it is managed by a SEP.
*/
path_id = xpt_path_path_id(path);
xpt_lock_buses();
TAILQ_FOREACH(periph, &encdriver.units, unit_links) {
struct enc_softc *softc;
softc = (struct enc_softc *)periph->softc;
if (xpt_path_path_id(periph->path) != path_id
|| softc == NULL
|| (softc->enc_flags & ENC_FLAG_INITIALIZED)
== 0
|| softc->enc_vec.device_found == NULL)
continue;
softc->enc_vec.device_found(softc);
}
xpt_unlock_buses();
return;
}
status = cam_periph_alloc(enc_ctor, enc_oninvalidate,
enc_dtor, NULL, "ses", CAM_PERIPH_BIO,
path, enc_async, AC_FOUND_DEVICE, cgd);
if (status != CAM_REQ_CMP && status != CAM_REQ_INPROG) {
printf("enc_async: Unable to probe new device due to "
"status 0x%x\n", status);
}
break;
}
default:
cam_periph_async(periph, code, path, arg);
break;
}
}
static int
enc_open(struct cdev *dev, int flags, int fmt, struct thread *td)
{
struct cam_periph *periph;
struct enc_softc *softc;
int error = 0;
periph = (struct cam_periph *)dev->si_drv1;
if (cam_periph_acquire(periph) != CAM_REQ_CMP)
return (ENXIO);
cam_periph_lock(periph);
softc = (struct enc_softc *)periph->softc;
if ((softc->enc_flags & ENC_FLAG_INITIALIZED) == 0) {
error = ENXIO;
goto out;
}
if (softc->enc_flags & ENC_FLAG_INVALID) {
error = ENXIO;
goto out;
}
out:
if (error != 0)
cam_periph_release_locked(periph);
else
softc->open_count++;
cam_periph_unlock(periph);
return (error);
}
static int
enc_close(struct cdev *dev, int flag, int fmt, struct thread *td)
{
struct cam_periph *periph;
struct enc_softc *enc;
struct mtx *mtx;
periph = (struct cam_periph *)dev->si_drv1;
mtx = cam_periph_mtx(periph);
mtx_lock(mtx);
enc = periph->softc;
enc->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);
}
int
enc_error(union ccb *ccb, uint32_t cflags, uint32_t sflags)
{
struct enc_softc *softc;
struct cam_periph *periph;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct enc_softc *)periph->softc;
return (cam_periph_error(ccb, cflags, sflags, &softc->saved_ccb));
}
static int
enc_ioctl(struct cdev *dev, u_long cmd, caddr_t arg_addr, int flag,
struct thread *td)
{
struct cam_periph *periph;
encioc_enc_status_t tmp;
encioc_string_t sstr;
encioc_elm_status_t elms;
encioc_elm_desc_t elmd;
encioc_elm_devnames_t elmdn;
encioc_element_t *uelm;
enc_softc_t *enc;
enc_cache_t *cache;
void *addr;
int error, i;
if (arg_addr)
addr = *((caddr_t *) arg_addr);
else
addr = NULL;
periph = (struct cam_periph *)dev->si_drv1;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering encioctl\n"));
cam_periph_lock(periph);
enc = (struct enc_softc *)periph->softc;
cache = &enc->enc_cache;
/*
* Now check to see whether we're initialized or not.
* This actually should never fail as we're not supposed
* to get past enc_open w/o successfully initializing
* things.
*/
if ((enc->enc_flags & ENC_FLAG_INITIALIZED) == 0) {
cam_periph_unlock(periph);
return (ENXIO);
}
cam_periph_unlock(periph);
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.
*
* For commands that get information about the
* device- we don't need to lock the peripheral
* if we aren't running a command. The periph
* also can't go away while a user process has
* it open.
*/
switch (cmd) {
case ENCIOC_GETNELM:
case ENCIOC_GETELMMAP:
case ENCIOC_GETENCSTAT:
case ENCIOC_GETELMSTAT:
case ENCIOC_GETELMDESC:
case ENCIOC_GETELMDEVNAMES:
case ENCIOC_GETENCNAME:
case ENCIOC_GETENCID:
break;
default:
if ((flag & FWRITE) == 0) {
return (EBADF);
}
}
/*
* XXX The values read here are only valid for the current
* configuration generation. We need these ioctls
* to also pass in/out a generation number.
*/
sx_slock(&enc->enc_cache_lock);
switch (cmd) {
case ENCIOC_GETNELM:
error = copyout(&cache->nelms, addr, sizeof (cache->nelms));
break;
case ENCIOC_GETELMMAP:
for (uelm = addr, i = 0; i != cache->nelms; i++) {
encioc_element_t kelm;
kelm.elm_idx = i;
kelm.elm_subenc_id = cache->elm_map[i].subenclosure;
kelm.elm_type = cache->elm_map[i].enctype;
error = copyout(&kelm, &uelm[i], sizeof(kelm));
if (error)
break;
}
break;
case ENCIOC_GETENCSTAT:
cam_periph_lock(periph);
error = enc->enc_vec.get_enc_status(enc, 1);
if (error) {
cam_periph_unlock(periph);
break;
}
tmp = cache->enc_status;
cam_periph_unlock(periph);
error = copyout(&tmp, addr, sizeof(tmp));
cache->enc_status = tmp;
break;
case ENCIOC_SETENCSTAT:
error = copyin(addr, &tmp, sizeof(tmp));
if (error)
break;
cam_periph_lock(periph);
error = enc->enc_vec.set_enc_status(enc, tmp, 1);
cam_periph_unlock(periph);
break;
case ENCIOC_GETSTRING:
case ENCIOC_SETSTRING:
case ENCIOC_GETENCNAME:
case ENCIOC_GETENCID:
if (enc->enc_vec.handle_string == NULL) {
error = EINVAL;
break;
}
error = copyin(addr, &sstr, sizeof(sstr));
if (error)
break;
cam_periph_lock(periph);
error = enc->enc_vec.handle_string(enc, &sstr, cmd);
cam_periph_unlock(periph);
break;
case ENCIOC_GETELMSTAT:
error = copyin(addr, &elms, sizeof(elms));
if (error)
break;
if (elms.elm_idx >= cache->nelms) {
error = EINVAL;
break;
}
cam_periph_lock(periph);
error = enc->enc_vec.get_elm_status(enc, &elms, 1);
cam_periph_unlock(periph);
if (error)
break;
error = copyout(&elms, addr, sizeof(elms));
break;
case ENCIOC_GETELMDESC:
error = copyin(addr, &elmd, sizeof(elmd));
if (error)
break;
if (elmd.elm_idx >= cache->nelms) {
error = EINVAL;
break;
}
if (enc->enc_vec.get_elm_desc != NULL) {
error = enc->enc_vec.get_elm_desc(enc, &elmd);
if (error)
break;
} else
elmd.elm_desc_len = 0;
error = copyout(&elmd, addr, sizeof(elmd));
break;
case ENCIOC_GETELMDEVNAMES:
if (enc->enc_vec.get_elm_devnames == NULL) {
error = EINVAL;
break;
}
error = copyin(addr, &elmdn, sizeof(elmdn));
if (error)
break;
if (elmdn.elm_idx >= cache->nelms) {
error = EINVAL;
break;
}
cam_periph_lock(periph);
error = (*enc->enc_vec.get_elm_devnames)(enc, &elmdn);
cam_periph_unlock(periph);
if (error)
break;
error = copyout(&elmdn, addr, sizeof(elmdn));
break;
case ENCIOC_SETELMSTAT:
error = copyin(addr, &elms, sizeof(elms));
if (error)
break;
if (elms.elm_idx >= cache->nelms) {
error = EINVAL;
break;
}
cam_periph_lock(periph);
error = enc->enc_vec.set_elm_status(enc, &elms, 1);
cam_periph_unlock(periph);
break;
case ENCIOC_INIT:
cam_periph_lock(periph);
error = enc->enc_vec.init_enc(enc);
cam_periph_unlock(periph);
break;
default:
cam_periph_lock(periph);
error = cam_periph_ioctl(periph, cmd, arg_addr, enc_error);
cam_periph_unlock(periph);
break;
}
sx_sunlock(&enc->enc_cache_lock);
return (error);
}
int
enc_runcmd(struct enc_softc *enc, char *cdb, int cdbl, char *dptr, int *dlenp)
{
int error, dlen, tdlen;
ccb_flags ddf;
union ccb *ccb;
CAM_DEBUG(enc->periph->path, CAM_DEBUG_TRACE,
("entering enc_runcmd\n"));
if (dptr) {
if ((dlen = *dlenp) < 0) {
dlen = -dlen;
ddf = CAM_DIR_OUT;
} else {
ddf = CAM_DIR_IN;
}
} else {
dlen = 0;
ddf = CAM_DIR_NONE;
}
if (cdbl > IOCDBLEN) {
cdbl = IOCDBLEN;
}
ccb = cam_periph_getccb(enc->periph, CAM_PRIORITY_NORMAL);
if (enc->enc_type == ENC_SEMB_SES || enc->enc_type == ENC_SEMB_SAFT) {
tdlen = min(dlen, 1020);
tdlen = (tdlen + 3) & ~3;
cam_fill_ataio(&ccb->ataio, 0, NULL, ddf, 0, dptr, tdlen,
30 * 1000);
if (cdb[0] == RECEIVE_DIAGNOSTIC)
ata_28bit_cmd(&ccb->ataio,
ATA_SEP_ATTN, cdb[2], 0x02, tdlen / 4);
else if (cdb[0] == SEND_DIAGNOSTIC)
ata_28bit_cmd(&ccb->ataio,
ATA_SEP_ATTN, dlen > 0 ? dptr[0] : 0,
0x82, tdlen / 4);
else if (cdb[0] == READ_BUFFER)
ata_28bit_cmd(&ccb->ataio,
ATA_SEP_ATTN, cdb[2], 0x00, tdlen / 4);
else
ata_28bit_cmd(&ccb->ataio,
ATA_SEP_ATTN, dlen > 0 ? dptr[0] : 0,
0x80, tdlen / 4);
} else {
tdlen = dlen;
cam_fill_csio(&ccb->csio, 0, NULL, ddf, MSG_SIMPLE_Q_TAG,
dptr, dlen, sizeof (struct scsi_sense_data), cdbl,
60 * 1000);
bcopy(cdb, ccb->csio.cdb_io.cdb_bytes, cdbl);
}
error = cam_periph_runccb(ccb, enc_error, ENC_CFLAGS, ENC_FLAGS, NULL);
if (error) {
if (dptr) {
*dlenp = dlen;
}
} else {
if (dptr) {
if (ccb->ccb_h.func_code == XPT_ATA_IO)
*dlenp = ccb->ataio.resid;
else
*dlenp = ccb->csio.resid;
*dlenp += tdlen - dlen;
}
}
xpt_release_ccb(ccb);
CAM_DEBUG(enc->periph->path, CAM_DEBUG_SUBTRACE,
("exiting enc_runcmd: *dlenp = %d\n", *dlenp));
return (error);
}
void
enc_log(struct enc_softc *enc, const char *fmt, ...)
{
va_list ap;
printf("%s%d: ", enc->periph->periph_name, enc->periph->unit_number);
va_start(ap, fmt);
vprintf(fmt, ap);
va_end(ap);
}
/*
* The code after this point runs on many platforms,
* so forgive the slightly awkward and nonconforming
* appearance.
*/
/*
* Is this a device that supports enclosure services?
*
* It's a pretty simple ruleset- if it is device type
* 0x0D (13), it's an ENCLOSURE device.
*/
#define SAFTE_START 44
#define SAFTE_END 50
#define SAFTE_LEN SAFTE_END-SAFTE_START
static enctyp
enc_type(struct ccb_getdev *cgd)
{
int buflen;
unsigned char *iqd;
if (cgd->protocol == PROTO_SEMB) {
iqd = (unsigned char *)&cgd->ident_data;
if (STRNCMP(iqd + 43, "S-E-S", 5) == 0)
return (ENC_SEMB_SES);
else if (STRNCMP(iqd + 43, "SAF-TE", 6) == 0)
return (ENC_SEMB_SAFT);
return (ENC_NONE);
} else if (cgd->protocol != PROTO_SCSI)
return (ENC_NONE);
iqd = (unsigned char *)&cgd->inq_data;
buflen = min(sizeof(cgd->inq_data),
SID_ADDITIONAL_LENGTH(&cgd->inq_data));
if ((iqd[0] & 0x1f) == T_ENCLOSURE) {
if ((iqd[2] & 0x7) > 2) {
return (ENC_SES);
} else {
return (ENC_SES_SCSI2);
}
return (ENC_NONE);
}
#ifdef SES_ENABLE_PASSTHROUGH
if ((iqd[6] & 0x40) && (iqd[2] & 0x7) >= 2) {
/*
* PassThrough Device.
*/
return (ENC_SES_PASSTHROUGH);
}
#endif
/*
* The comparison is short for a reason-
* some vendors were chopping it short.
*/
if (buflen < SAFTE_END - 2) {
return (ENC_NONE);
}
if (STRNCMP((char *)&iqd[SAFTE_START], "SAF-TE", SAFTE_LEN - 2) == 0) {
return (ENC_SAFT);
}
return (ENC_NONE);
}
/*================== Enclosure Monitoring/Processing Daemon ==================*/
/**
* \brief Queue an update request for a given action, if needed.
*
* \param enc SES softc to queue the request for.
* \param action Action requested.
*/
void
enc_update_request(enc_softc_t *enc, uint32_t action)
{
if ((enc->pending_actions & (0x1 << action)) == 0) {
enc->pending_actions |= (0x1 << action);
ENC_DLOG(enc, "%s: queing requested action %d\n",
__func__, action);
if (enc->current_action == ENC_UPDATE_NONE)
wakeup(enc->enc_daemon);
} else {
ENC_DLOG(enc, "%s: ignoring requested action %d - "
"Already queued\n", __func__, action);
}
}
/**
* \brief Invoke the handler of the highest priority pending
* state in the SES state machine.
*
* \param enc The SES instance invoking the state machine.
*/
static void
enc_fsm_step(enc_softc_t *enc)
{
union ccb *ccb;
uint8_t *buf;
struct enc_fsm_state *cur_state;
int error;
uint32_t xfer_len;
ENC_DLOG(enc, "%s enter %p\n", __func__, enc);
enc->current_action = ffs(enc->pending_actions) - 1;
enc->pending_actions &= ~(0x1 << enc->current_action);
cur_state = &enc->enc_fsm_states[enc->current_action];
buf = NULL;
if (cur_state->buf_size != 0) {
cam_periph_unlock(enc->periph);
buf = malloc(cur_state->buf_size, M_SCSIENC, M_WAITOK|M_ZERO);
cam_periph_lock(enc->periph);
}
error = 0;
ccb = NULL;
if (cur_state->fill != NULL) {
ccb = cam_periph_getccb(enc->periph, CAM_PRIORITY_NORMAL);
error = cur_state->fill(enc, cur_state, ccb, buf);
if (error != 0)
goto done;
error = cam_periph_runccb(ccb, cur_state->error,
ENC_CFLAGS,
ENC_FLAGS|SF_QUIET_IR, NULL);
}
if (ccb != NULL) {
if (ccb->ccb_h.func_code == XPT_ATA_IO)
xfer_len = ccb->ataio.dxfer_len - ccb->ataio.resid;
else
xfer_len = ccb->csio.dxfer_len - ccb->csio.resid;
} else
xfer_len = 0;
cam_periph_unlock(enc->periph);
cur_state->done(enc, cur_state, ccb, &buf, error, xfer_len);
cam_periph_lock(enc->periph);
done:
ENC_DLOG(enc, "%s exit - result %d\n", __func__, error);
ENC_FREE_AND_NULL(buf);
if (ccb != NULL)
xpt_release_ccb(ccb);
}
/**
* \invariant Called with cam_periph mutex held.
*/
static void
enc_status_updater(void *arg)
{
enc_softc_t *enc;
enc = arg;
if (enc->enc_vec.poll_status != NULL)
enc->enc_vec.poll_status(enc);
}
static void
enc_daemon(void *arg)
{
enc_softc_t *enc;
enc = arg;
cam_periph_lock(enc->periph);
while ((enc->enc_flags & ENC_FLAG_SHUTDOWN) == 0) {
if (enc->pending_actions == 0) {
struct intr_config_hook *hook;
/*
* Reset callout and msleep, or
* issue timed task completion
* status command.
*/
enc->current_action = ENC_UPDATE_NONE;
/*
* We've been through our state machine at least
* once. Allow the transition to userland.
*/
hook = &enc->enc_boot_hold_ch;
if (hook->ich_func != NULL) {
config_intrhook_disestablish(hook);
hook->ich_func = NULL;
}
callout_reset(&enc->status_updater, 60*hz,
enc_status_updater, enc);
cam_periph_sleep(enc->periph, enc->enc_daemon,
PUSER, "idle", 0);
} else {
enc_fsm_step(enc);
}
}
enc->enc_daemon = NULL;
cam_periph_unlock(enc->periph);
cam_periph_release(enc->periph);
kproc_exit(0);
}
static int
enc_kproc_init(enc_softc_t *enc)
{
int result;
callout_init_mtx(&enc->status_updater, cam_periph_mtx(enc->periph), 0);
if (cam_periph_acquire(enc->periph) != CAM_REQ_CMP)
return (ENXIO);
result = kproc_create(enc_daemon, enc, &enc->enc_daemon, /*flags*/0,
/*stackpgs*/0, "enc_daemon%d",
enc->periph->unit_number);
if (result == 0) {
/* Do an initial load of all page data. */
cam_periph_lock(enc->periph);
enc->enc_vec.poll_status(enc);
cam_periph_unlock(enc->periph);
} else
cam_periph_release(enc->periph);
return (result);
}
/**
* \brief Interrupt configuration hook callback associated with
* enc_boot_hold_ch.
*
* Since interrupts are always functional at the time of enclosure
* configuration, there is nothing to be done when the callback occurs.
* This hook is only registered to hold up boot processing while initial
* eclosure processing occurs.
*
* \param arg The enclosure softc, but currently unused in this callback.
*/
static void
enc_nop_confighook_cb(void *arg __unused)
{
}
static cam_status
enc_ctor(struct cam_periph *periph, void *arg)
{
cam_status status = CAM_REQ_CMP_ERR;
int err;
enc_softc_t *enc;
struct ccb_getdev *cgd;
char *tname;
struct make_dev_args args;
struct sbuf sb;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL) {
printf("enc_ctor: no getdev CCB, can't register device\n");
goto out;
}
enc = ENC_MALLOCZ(sizeof(*enc));
if (enc == NULL) {
printf("enc_ctor: Unable to probe new device. "
"Unable to allocate enc\n");
goto out;
}
enc->periph = periph;
enc->current_action = ENC_UPDATE_INVALID;
enc->enc_type = enc_type(cgd);
sx_init(&enc->enc_cache_lock, "enccache");
switch (enc->enc_type) {
case ENC_SES:
case ENC_SES_SCSI2:
case ENC_SES_PASSTHROUGH:
case ENC_SEMB_SES:
err = ses_softc_init(enc);
break;
case ENC_SAFT:
case ENC_SEMB_SAFT:
err = safte_softc_init(enc);
break;
case ENC_NONE:
default:
ENC_FREE(enc);
return (CAM_REQ_CMP_ERR);
}
if (err) {
xpt_print(periph->path, "error %d initializing\n", err);
goto out;
}
/*
* Hold off userland until we have made at least one pass
* through our state machine so that physical path data is
* present.
*/
if (enc->enc_vec.poll_status != NULL) {
enc->enc_boot_hold_ch.ich_func = enc_nop_confighook_cb;
enc->enc_boot_hold_ch.ich_arg = enc;
config_intrhook_establish(&enc->enc_boot_hold_ch);
}
/*
* The softc field is set only once the enc is fully initialized
* so that we can rely on this field to detect partially
* initialized periph objects in the AC_FOUND_DEVICE handler.
*/
periph->softc = enc;
cam_periph_unlock(periph);
if (enc->enc_vec.poll_status != NULL) {
err = enc_kproc_init(enc);
if (err) {
xpt_print(periph->path,
"error %d starting enc_daemon\n", err);
goto out;
}
}
/*
* 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);
}
make_dev_args_init(&args);
args.mda_devsw = &enc_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;
err = make_dev_s(&args, &enc->enc_dev, "%s%d", periph->periph_name,
periph->unit_number);
cam_periph_lock(periph);
if (err != 0) {
cam_periph_release_locked(periph);
return (CAM_REQ_CMP_ERR);
}
enc->enc_flags |= ENC_FLAG_INITIALIZED;
/*
* Add an async callback so that we get notified if this
* device goes away.
*/
xpt_register_async(AC_LOST_DEVICE, enc_async, periph, periph->path);
switch (enc->enc_type) {
default:
case ENC_NONE:
tname = "No ENC device";
break;
case ENC_SES_SCSI2:
tname = "SCSI-2 ENC Device";
break;
case ENC_SES:
tname = "SCSI-3 ENC Device";
break;
case ENC_SES_PASSTHROUGH:
tname = "ENC Passthrough Device";
break;
case ENC_SAFT:
tname = "SAF-TE Compliant Device";
break;
case ENC_SEMB_SES:
tname = "SEMB SES Device";
break;
case ENC_SEMB_SAFT:
tname = "SEMB SAF-TE Device";
break;
}
sbuf_new(&sb, enc->announce_buf, ENC_ANNOUNCE_SZ, SBUF_FIXEDLEN);
xpt_announce_periph_sbuf(periph, &sb, tname);
sbuf_finish(&sb);
sbuf_putbuf(&sb);
status = CAM_REQ_CMP;
out:
if (status != CAM_REQ_CMP)
enc_dtor(periph);
return (status);
}
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