* Copyright (c) 2000, 2006, 2007 The NetBSD Foundation, Inc.

/* $NetBSD: cac.c,v 1.64 2024/02/10 09:24:17 andvar Exp $ */

/*-
* Copyright (c) 2000, 2006, 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

/*
* Driver for Compaq array controllers.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cac.c,v 1.64 2024/02/10 09:24:17 andvar Exp $");

#if defined(_KERNEL_OPT)
#include "bio.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/endian.h>
#include <sys/malloc.h>
#include <sys/pool.h>
#include <sys/module.h>
#include <sys/bswap.h>
#include <sys/bus.h>

#include <dev/ic/cacreg.h>
#include <dev/ic/cacvar.h>

#if NBIO > 0
#include <dev/biovar.h>
#endif /* NBIO > 0 */

#include "ioconf.h"
#include "locators.h"

static struct cac_ccb *cac_ccb_alloc(struct cac_softc *, int);
static void cac_ccb_done(struct cac_softc *, struct cac_ccb *);
static void cac_ccb_free(struct cac_softc *, struct cac_ccb *);
static int cac_ccb_poll(struct cac_softc *, struct cac_ccb *, int);
static int cac_ccb_start(struct cac_softc *, struct cac_ccb *);
static int cac_print(void *, const char *);
static void cac_shutdown(void *);

static struct cac_ccb *cac_l0_completed(struct cac_softc *);
static int cac_l0_fifo_full(struct cac_softc *);
static void cac_l0_intr_enable(struct cac_softc *, int);
static int cac_l0_intr_pending(struct cac_softc *);
static void cac_l0_submit(struct cac_softc *, struct cac_ccb *);

static void *cac_sdh; /* shutdown hook */

#if NBIO > 0
int cac_ioctl(device_t, u_long, void *);
int cac_ioctl_vol(struct cac_softc *, struct bioc_vol *);
int cac_create_sensors(struct cac_softc *);
void cac_sensor_refresh(struct sysmon_envsys *, envsys_data_t *);
#endif /* NBIO > 0 */

const struct cac_linkage cac_l0 = {
cac_l0_completed,
cac_l0_fifo_full,
cac_l0_intr_enable,
cac_l0_intr_pending,
cac_l0_submit
};

/*
* Initialise our interface to the controller.
*/
int
cac_init(struct cac_softc *sc, const char *intrstr, int startfw)
{
struct cac_controller_info cinfo;
int error, rseg, size, i;
bus_dma_segment_t seg;
struct cac_ccb *ccb;
char firm[8];

if (intrstr != NULL)
aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr);

SIMPLEQ_INIT(&sc->sc_ccb_free);
SIMPLEQ_INIT(&sc->sc_ccb_queue);
mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_VM);
cv_init(&sc->sc_ccb_cv, "cacccb");

size = sizeof(struct cac_ccb) * CAC_MAX_CCBS;

if ((error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, &seg, 1,
&rseg, BUS_DMA_NOWAIT)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to allocate CCBs, error = %d\n",
error);
return (-1);
}

if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, size,
(void **)&sc->sc_ccbs,
BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to map CCBs, error = %d\n",
error);
return (-1);
}

if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
BUS_DMA_NOWAIT, &sc->sc_dmamap)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to create CCB DMA map, error = %d\n",
error);
return (-1);
}

if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap, sc->sc_ccbs,
size, NULL, BUS_DMA_NOWAIT)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to load CCB DMA map, error = %d\n",
error);
return (-1);
}

sc->sc_ccbs_paddr = sc->sc_dmamap->dm_segs[0].ds_addr;
memset(sc->sc_ccbs, 0, size);
ccb = (struct cac_ccb *)sc->sc_ccbs;

for (i = 0; i < CAC_MAX_CCBS; i++, ccb++) {
/* Create the DMA map for this CCB's data */
error = bus_dmamap_create(sc->sc_dmat, CAC_MAX_XFER,
CAC_SG_SIZE, CAC_MAX_XFER, 0,
BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&ccb->ccb_dmamap_xfer);

if (error) {
aprint_error_dev(sc->sc_dev, "can't create ccb dmamap (%d)\n",
error);
break;
}

ccb->ccb_flags = 0;
ccb->ccb_paddr = sc->sc_ccbs_paddr + i * sizeof(struct cac_ccb);
SIMPLEQ_INSERT_TAIL(&sc->sc_ccb_free, ccb, ccb_chain);
}

/* Start firmware background tasks, if needed. */
if (startfw) {
if (cac_cmd(sc, CAC_CMD_START_FIRMWARE, &cinfo, sizeof(cinfo),
0, 0, CAC_CCB_DATA_IN, NULL)) {
aprint_error_dev(sc->sc_dev, "CAC_CMD_START_FIRMWARE failed\n");
return (-1);
}
}

if (cac_cmd(sc, CAC_CMD_GET_CTRL_INFO, &cinfo, sizeof(cinfo), 0, 0,
CAC_CCB_DATA_IN, NULL)) {
aprint_error_dev(sc->sc_dev, "CAC_CMD_GET_CTRL_INFO failed\n");
return (-1);
}

strlcpy(firm, cinfo.firm_rev, 4+1);
printf("%s: %d channels, firmware <%s>\n", device_xname(sc->sc_dev),
cinfo.scsi_chips, firm);

/* Limit number of units to size of our sc_unitmask */
sc->sc_nunits = cinfo.num_drvs;
if (sc->sc_nunits > sizeof(sc->sc_unitmask) * NBBY)
sc->sc_nunits = sizeof(sc->sc_unitmask) * NBBY;

/* Attach our units */
sc->sc_unitmask = 0;
cac_rescan(sc->sc_dev, NULL, NULL);

/* Set our `shutdownhook' before we start any device activity. */
if (cac_sdh == NULL)
cac_sdh = shutdownhook_establish(cac_shutdown, NULL);

mutex_enter(&sc->sc_mutex);
(*sc->sc_cl.cl_intr_enable)(sc, CAC_INTR_ENABLE);
mutex_exit(&sc->sc_mutex);

#if NBIO > 0
if (bio_register(sc->sc_dev, cac_ioctl) != 0)
aprint_error_dev(sc->sc_dev, "controller registration failed");
else
sc->sc_ioctl = cac_ioctl;
if (cac_create_sensors(sc) != 0)
aprint_error_dev(sc->sc_dev, "unable to create sensors\n");
#endif

return (0);
}

int
cac_rescan(device_t self, const char *attr, const int *locs)
{
struct cac_softc *sc;
struct cac_attach_args caca;
int mlocs[CACCF_NLOCS];
int i;

sc = device_private(self);
for (i = 0; i < sc->sc_nunits; i++) {
if (sc->sc_unitmask & (1 << i))
continue;
caca.caca_unit = i;

mlocs[CACCF_UNIT] = i;

if (config_found(self, &caca, cac_print,
CFARGS(.submatch = config_stdsubmatch,
.locators = mlocs)) != NULL)
sc->sc_unitmask |= 1 << i;
}
return 0;
}

/*
* Shut down all `cac' controllers.
*/
static void
cac_shutdown(void *cookie)
{
struct cac_softc *sc;
u_int8_t tbuf[512];
int i;

for (i = 0; i < cac_cd.cd_ndevs; i++) {
if ((sc = device_lookup_private(&cac_cd, i)) == NULL)
continue;
memset(tbuf, 0, sizeof(tbuf));
tbuf[0] = 1;
cac_cmd(sc, CAC_CMD_FLUSH_CACHE, tbuf, sizeof(tbuf), 0, 0,
CAC_CCB_DATA_OUT, NULL);
}
}

/*
* Print autoconfiguration message for a sub-device.
*/
static int
cac_print(void *aux, const char *pnp)
{
struct cac_attach_args *caca;

caca = (struct cac_attach_args *)aux;

if (pnp != NULL)
aprint_normal("block device at %s", pnp);
aprint_normal(" unit %d", caca->caca_unit);
return (UNCONF);
}

/*
* Handle an interrupt from the controller: process finished CCBs and
* dequeue any waiting CCBs.
*/
int
cac_intr(void *cookie)
{
struct cac_softc *sc;
struct cac_ccb *ccb;
int rv;

sc = cookie;

mutex_enter(&sc->sc_mutex);

if ((*sc->sc_cl.cl_intr_pending)(sc)) {
while ((ccb = (*sc->sc_cl.cl_completed)(sc)) != NULL) {
cac_ccb_done(sc, ccb);
cac_ccb_start(sc, NULL);
}
rv = 1;
} else
rv = 0;

mutex_exit(&sc->sc_mutex);

return (rv);
}

/*
* Execute a [polled] command.
*/
int
cac_cmd(struct cac_softc *sc, int command, void *data, int datasize,
int drive, int blkno, int flags, struct cac_context *context)
{
struct cac_ccb *ccb;
struct cac_sgb *sgb;
int i, rv, size, nsegs;

size = 0;

if ((ccb = cac_ccb_alloc(sc, 1)) == NULL) {
aprint_error_dev(sc->sc_dev, "unable to alloc CCB");
return (EAGAIN);
}

if ((flags & (CAC_CCB_DATA_IN | CAC_CCB_DATA_OUT)) != 0) {
bus_dmamap_load(sc->sc_dmat, ccb->ccb_dmamap_xfer,
(void *)data, datasize, NULL, BUS_DMA_NOWAIT |
BUS_DMA_STREAMING | ((flags & CAC_CCB_DATA_IN) ?
BUS_DMA_READ : BUS_DMA_WRITE));

bus_dmamap_sync(sc->sc_dmat, ccb->ccb_dmamap_xfer, 0, datasize,
(flags & CAC_CCB_DATA_IN) != 0 ? BUS_DMASYNC_PREREAD :
BUS_DMASYNC_PREWRITE);

sgb = ccb->ccb_seg;
nsegs = uimin(ccb->ccb_dmamap_xfer->dm_nsegs, CAC_SG_SIZE);

for (i = 0; i < nsegs; i++, sgb++) {
size += ccb->ccb_dmamap_xfer->dm_segs[i].ds_len;
sgb->length =
htole32(ccb->ccb_dmamap_xfer->dm_segs[i].ds_len);
sgb->addr =
htole32(ccb->ccb_dmamap_xfer->dm_segs[i].ds_addr);
}
} else {
size = datasize;
nsegs = 0;
}

ccb->ccb_hdr.drive = drive;
ccb->ccb_hdr.priority = 0;
ccb->ccb_hdr.size = htole16((sizeof(struct cac_req) +
sizeof(struct cac_sgb) * CAC_SG_SIZE) >> 2);

ccb->ccb_req.next = 0;
ccb->ccb_req.error = 0;
ccb->ccb_req.reserved = 0;
ccb->ccb_req.bcount = htole16(howmany(size, DEV_BSIZE));
ccb->ccb_req.command = command;
ccb->ccb_req.sgcount = nsegs;
ccb->ccb_req.blkno = htole32(blkno);

ccb->ccb_flags = flags;
ccb->ccb_datasize = size;

mutex_enter(&sc->sc_mutex);

if (context == NULL) {
memset(&ccb->ccb_context, 0, sizeof(struct cac_context));

/* Synchronous commands mustn't wait. */
if ((*sc->sc_cl.cl_fifo_full)(sc)) {
cac_ccb_free(sc, ccb);
rv = EAGAIN;
} else {
#ifdef DIAGNOSTIC
ccb->ccb_flags |= CAC_CCB_ACTIVE;
#endif
(*sc->sc_cl.cl_submit)(sc, ccb);
rv = cac_ccb_poll(sc, ccb, 2000);
cac_ccb_free(sc, ccb);
}
} else {
memcpy(&ccb->ccb_context, context, sizeof(struct cac_context));
(void)cac_ccb_start(sc, ccb);
rv = 0;
}

mutex_exit(&sc->sc_mutex);
return (rv);
}

/*
* Wait for the specified CCB to complete.
*/
static int
cac_ccb_poll(struct cac_softc *sc, struct cac_ccb *wantccb, int timo)
{
struct cac_ccb *ccb;

KASSERT(mutex_owned(&sc->sc_mutex));

timo *= 1000;

do {
for (; timo != 0; timo--) {
ccb = (*sc->sc_cl.cl_completed)(sc);
if (ccb != NULL)
break;
DELAY(1);
}

if (timo == 0) {
printf("%s: timeout\n", device_xname(sc->sc_dev));
return (EBUSY);
}
cac_ccb_done(sc, ccb);
} while (ccb != wantccb);

return (0);
}

/*
* Enqueue the specified command (if any) and attempt to start all enqueued
* commands.
*/
static int
cac_ccb_start(struct cac_softc *sc, struct cac_ccb *ccb)
{

KASSERT(mutex_owned(&sc->sc_mutex));

if (ccb != NULL)
SIMPLEQ_INSERT_TAIL(&sc->sc_ccb_queue, ccb, ccb_chain);

while ((ccb = SIMPLEQ_FIRST(&sc->sc_ccb_queue)) != NULL) {
if ((*sc->sc_cl.cl_fifo_full)(sc))
return (EAGAIN);
SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_queue, ccb_chain);
#ifdef DIAGNOSTIC
ccb->ccb_flags |= CAC_CCB_ACTIVE;
#endif
(*sc->sc_cl.cl_submit)(sc, ccb);
}

return (0);
}

/*
* Process a finished CCB.
*/
static void
cac_ccb_done(struct cac_softc *sc, struct cac_ccb *ccb)
{
device_t dv;
void *context;
int error;

error = 0;

KASSERT(mutex_owned(&sc->sc_mutex));

#ifdef DIAGNOSTIC
if ((ccb->ccb_flags & CAC_CCB_ACTIVE) == 0)
panic("cac_ccb_done: CCB not active");
ccb->ccb_flags &= ~CAC_CCB_ACTIVE;
#endif

if ((ccb->ccb_flags & (CAC_CCB_DATA_IN | CAC_CCB_DATA_OUT)) != 0) {
bus_dmamap_sync(sc->sc_dmat, ccb->ccb_dmamap_xfer, 0,
ccb->ccb_datasize, ccb->ccb_flags & CAC_CCB_DATA_IN ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->sc_dmat, ccb->ccb_dmamap_xfer);
}

error = ccb->ccb_req.error;
if (ccb->ccb_context.cc_handler != NULL) {
dv = ccb->ccb_context.cc_dv;
context = ccb->ccb_context.cc_context;
cac_ccb_free(sc, ccb);
(*ccb->ccb_context.cc_handler)(dv, context, error);
} else {
if ((error & CAC_RET_SOFT_ERROR) != 0)
aprint_error_dev(sc->sc_dev, "soft error; array may be degraded\n");
if ((error & CAC_RET_HARD_ERROR) != 0)
aprint_error_dev(sc->sc_dev, "hard error\n");
if ((error & CAC_RET_CMD_REJECTED) != 0) {
error = 1;
aprint_error_dev(sc->sc_dev, "invalid request\n");
}
}
}

/*
* Allocate a CCB.
*/
static struct cac_ccb *
cac_ccb_alloc(struct cac_softc *sc, int nosleep)
{
struct cac_ccb *ccb;

mutex_enter(&sc->sc_mutex);

for (;;) {
if ((ccb = SIMPLEQ_FIRST(&sc->sc_ccb_free)) != NULL) {
SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_free, ccb_chain);
break;
}
if (nosleep) {
ccb = NULL;
break;
}
cv_wait(&sc->sc_ccb_cv, &sc->sc_mutex);
}

mutex_exit(&sc->sc_mutex);
return (ccb);
}

/*
* Put a CCB onto the freelist.
*/
static void
cac_ccb_free(struct cac_softc *sc, struct cac_ccb *ccb)
{

KASSERT(mutex_owned(&sc->sc_mutex));

ccb->ccb_flags = 0;
if (SIMPLEQ_EMPTY(&sc->sc_ccb_free))
cv_signal(&sc->sc_ccb_cv);
SIMPLEQ_INSERT_HEAD(&sc->sc_ccb_free, ccb, ccb_chain);
}

/*
* Board specific linkage shared between multiple bus types.
*/

static int
cac_l0_fifo_full(struct cac_softc *sc)
{

KASSERT(mutex_owned(&sc->sc_mutex));

return (cac_inl(sc, CAC_REG_CMD_FIFO) == 0);
}

static void
cac_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
{

KASSERT(mutex_owned(&sc->sc_mutex));

bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap,
(char *)ccb - (char *)sc->sc_ccbs,
sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
cac_outl(sc, CAC_REG_CMD_FIFO, ccb->ccb_paddr);
}

static struct cac_ccb *
cac_l0_completed(struct cac_softc *sc)
{
struct cac_ccb *ccb;
paddr_t off;

KASSERT(mutex_owned(&sc->sc_mutex));

if ((off = cac_inl(sc, CAC_REG_DONE_FIFO)) == 0)
return (NULL);

if ((off & 3) != 0)
aprint_error_dev(sc->sc_dev, "failed command list returned: %lx\n",
(long)off);

off = (off & ~3) - sc->sc_ccbs_paddr;
ccb = (struct cac_ccb *)((char *)sc->sc_ccbs + off);

bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);

if ((off & 3) != 0 && ccb->ccb_req.error == 0)
ccb->ccb_req.error = CAC_RET_CMD_REJECTED;

return (ccb);
}

static int
cac_l0_intr_pending(struct cac_softc *sc)
{

KASSERT(mutex_owned(&sc->sc_mutex));

return (cac_inl(sc, CAC_REG_INTR_PENDING) & CAC_INTR_ENABLE);
}

static void
cac_l0_intr_enable(struct cac_softc *sc, int state)
{

KASSERT(mutex_owned(&sc->sc_mutex));

cac_outl(sc, CAC_REG_INTR_MASK,
state ? CAC_INTR_ENABLE : CAC_INTR_DISABLE);
}

#if NBIO > 0
const int cac_level[] = { 0, 4, 1, 5, 51, 7 };
const int cac_stat[] = { BIOC_SVONLINE, BIOC_SVOFFLINE, BIOC_SVOFFLINE,
BIOC_SVDEGRADED, BIOC_SVREBUILD, BIOC_SVREBUILD, BIOC_SVDEGRADED,
BIOC_SVDEGRADED, BIOC_SVINVALID, BIOC_SVINVALID, BIOC_SVBUILDING,
BIOC_SVOFFLINE, BIOC_SVBUILDING };

int
cac_ioctl(device_t dev, u_long cmd, void *addr)
{
struct cac_softc *sc = device_private(dev);
struct bioc_inq *bi;
struct bioc_disk *bd;
cac_lock_t lock;
int error = 0;

lock = CAC_LOCK(sc);
switch (cmd) {
case BIOCINQ:
bi = (struct bioc_inq *)addr;
strlcpy(bi->bi_dev, device_xname(sc->sc_dev), sizeof(bi->bi_dev));
bi->bi_novol = sc->sc_nunits;
bi->bi_nodisk = 0;
break;

case BIOCVOL:
error = cac_ioctl_vol(sc, (struct bioc_vol *)addr);
break;

case BIOCDISK:
case BIOCDISK_NOVOL:
bd = (struct bioc_disk *)addr;
if (bd->bd_volid > sc->sc_nunits) {
error = EINVAL;
break;
}
/* No disk information yet */
break;

default:
error = EINVAL;
}
CAC_UNLOCK(sc, lock);

return (error);
}

int
cac_ioctl_vol(struct cac_softc *sc, struct bioc_vol *bv)
{
struct cac_drive_info dinfo;
struct cac_drive_status dstatus;
u_int32_t blks;

if (bv->bv_volid > sc->sc_nunits) {
return EINVAL;
}
if (cac_cmd(sc, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo),
bv->bv_volid, 0, CAC_CCB_DATA_IN, NULL)) {
return EIO;
}
if (cac_cmd(sc, CAC_CMD_SENSE_DRV_STATUS, &dstatus, sizeof(dstatus),
bv->bv_volid, 0, CAC_CCB_DATA_IN, NULL)) {
return EIO;
}
blks = CAC_GET2(dinfo.ncylinders) * CAC_GET1(dinfo.nheads) *
CAC_GET1(dinfo.nsectors);
bv->bv_size = (off_t)blks * CAC_GET2(dinfo.secsize);
bv->bv_level = cac_level[CAC_GET1(dinfo.mirror)]; /*XXX limit check */
bv->bv_nodisk = 0; /* XXX */
bv->bv_status = 0; /* XXX */
bv->bv_percent = -1;
bv->bv_seconds = 0;
if (dstatus.stat < sizeof(cac_stat)/sizeof(cac_stat[0]))
bv->bv_status = cac_stat[dstatus.stat];
if (bv->bv_status == BIOC_SVREBUILD ||
bv->bv_status == BIOC_SVBUILDING)
bv->bv_percent = ((blks - CAC_GET4(dstatus.prog)) * 1000ULL) /
blks;
return 0;
}

int
cac_create_sensors(struct cac_softc *sc)
{
int i;
int nsensors = sc->sc_nunits;

sc->sc_sme = sysmon_envsys_create();
sc->sc_sensor = malloc(sizeof(envsys_data_t) * nsensors,
M_DEVBUF, M_WAITOK | M_ZERO);
for (i = 0; i < nsensors; i++) {
sc->sc_sensor[i].units = ENVSYS_DRIVE;
sc->sc_sensor[i].state = ENVSYS_SINVALID;
sc->sc_sensor[i].value_cur = ENVSYS_DRIVE_EMPTY;
/* Enable monitoring for drive state changes */
sc->sc_sensor[i].flags |= ENVSYS_FMONSTCHANGED;
/* logical drives */
snprintf(sc->sc_sensor[i].desc,
sizeof(sc->sc_sensor[i].desc), "%s:%d",
device_xname(sc->sc_dev), i);
if (sysmon_envsys_sensor_attach(sc->sc_sme,
&sc->sc_sensor[i]))
goto out;
}
sc->sc_sme->sme_name = device_xname(sc->sc_dev);
sc->sc_sme->sme_cookie = sc;
sc->sc_sme->sme_refresh = cac_sensor_refresh;
if (sysmon_envsys_register(sc->sc_sme)) {
aprint_error_dev(sc->sc_dev, "unable to register with sysmon\n");
return(1);
}
return (0);

out:
free(sc->sc_sensor, M_DEVBUF);
sysmon_envsys_destroy(sc->sc_sme);
return EINVAL;
}

void
cac_sensor_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
{
struct cac_softc *sc = sme->sme_cookie;
struct bioc_vol bv;
int s;

if (edata->sensor >= sc->sc_nunits)
return;

memset(&bv, 0, sizeof(bv));
bv.bv_volid = edata->sensor;
s = splbio();
if (cac_ioctl_vol(sc, &bv))
bv.bv_status = BIOC_SVINVALID;
splx(s);

bio_vol_to_envsys(edata, &bv);
}
#endif /* NBIO > 0 */

MODULE(MODULE_CLASS_DRIVER, cac, NULL);

#ifdef _MODULE
CFDRIVER_DECL(cac, DV_DISK, NULL);
#endif

static int
cac_modcmd(modcmd_t cmd, void *opaque)
{
int error = 0;

#ifdef _MODULE
switch (cmd) {
case MODULE_CMD_INIT:
error = config_cfdriver_attach(&cac_cd);
break;
case MODULE_CMD_FINI:
error = config_cfdriver_detach(&cac_cd);
break;
default:
error = ENOTTY;
break;
}
#endif
return error;
}