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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/systm.h>
#include <sys/kstat.h>
#include <sys/crypto/common.h>
#include <sys/crypto/spi.h>
#include <sys/n2rng.h>
/*
* Kernel statistics.
*/
static int n2rng_ksupdate(kstat_t *, int);
/*
* Initialize Kstats.
*/
void
n2rng_ksinit(n2rng_t *n2rng)
{
int instance;
int i;
int j;
char buf[64];
if (ddi_getprop(DDI_DEV_T_ANY, n2rng->n_dip,
DDI_PROP_CANSLEEP | DDI_PROP_DONTPASS, "nostats", 0) != 0) {
/*
* sysadmin has explicity disabled stats to prevent
* covert channel.
*/
return;
}
instance = ddi_get_instance(n2rng->n_dip);
/*
* Named kstats.
*/
n2rng->n_ksp = kstat_create(DRIVER, instance, NULL, "misc",
KSTAT_TYPE_NAMED,
sizeof (n2rng_stat_t) / sizeof (kstat_named_t),
KSTAT_FLAG_WRITABLE);
if (n2rng->n_ksp == NULL) {
n2rng_error(n2rng, "unable to create kstats");
} else {
n2rng_stat_t *dkp = (n2rng_stat_t *)n2rng->n_ksp->ks_data;
kstat_named_init(&dkp->ns_status, "status", KSTAT_DATA_CHAR);
kstat_named_init(&dkp->ns_algs[DS_RNGJOBS], "rngjobs",
KSTAT_DATA_ULONGLONG);
kstat_named_init(&dkp->ns_algs[DS_RNGBYTES], "rngbytes",
KSTAT_DATA_ULONGLONG);
if (n2rng_iscontrol(n2rng)) {
for (i = 0; i < n2rng->n_ctl_data->n_num_rngs; i++) {
(void) sprintf(buf, "rng%d-state", i);
kstat_named_init(&dkp->ns_rngstate[i],
buf, KSTAT_DATA_CHAR);
for (j = 0; j < N2RNG_NOSC; j++) {
(void) sprintf(buf,
"rng%d-cell%d-bias", i, j);
kstat_named_init
(&dkp->ns_rngbias[i][j],
buf, KSTAT_DATA_ULONGLONG);
(void) sprintf(buf,
"rng%d-cell%d-entropy", i, j);
kstat_named_init
(&dkp->ns_rngentropy[i][j],
buf, KSTAT_DATA_ULONGLONG);
}
}
}
n2rng->n_ksp->ks_update = n2rng_ksupdate;
n2rng->n_ksp->ks_private = n2rng;
kstat_install(n2rng->n_ksp);
}
}
/*
* Deinitialize Kstats.
*/
void
n2rng_ksdeinit(n2rng_t *n2rng)
{
if (n2rng->n_ksp != NULL) {
kstat_delete(n2rng->n_ksp);
n2rng->n_ksp = NULL;
}
}
/*
* Update Kstats.
*/
int
n2rng_ksupdate(kstat_t *ksp, int rw)
{
n2rng_t *n2rng;
n2rng_stat_t *dkp;
int i;
int j;
n2rng = (n2rng_t *)ksp->ks_private;
dkp = (n2rng_stat_t *)ksp->ks_data;
if (rw == KSTAT_WRITE) {
for (i = 0; i < DS_MAX; i++) {
n2rng->n_stats[i] = dkp->ns_algs[i].value.ull;
}
} else {
/* handy status value */
if (n2rng_isfailed(n2rng)) {
/* device has failed */
(void) strcpy(dkp->ns_status.value.c, "failed");
} else if (!n2rng_isconfigured(n2rng)) {
/* device is not configured */
(void) strcpy(dkp->ns_status.value.c, "offline");
} else {
/* everything looks good */
(void) strcpy(dkp->ns_status.value.c, "online");
}
for (i = 0; i < DS_MAX; i++) {
dkp->ns_algs[i].value.ull = n2rng->n_stats[i];
}
if (n2rng_iscontrol(n2rng)) {
rng_entry_t *rng;
for (i = 0; i < n2rng->n_ctl_data->n_num_rngs; i++) {
rng = &n2rng->n_ctl_data->n_rngs[i];
switch (rng->n_rng_state) {
case CTL_STATE_ERROR:
(void) strcpy(
dkp->ns_rngstate[i].value.c,
"error");
break;
case CTL_STATE_HEALTHCHECK:
(void) strcpy(
dkp->ns_rngstate[i].value.c,
"healthcheck");
break;
case CTL_STATE_CONFIGURED:
(void) strcpy(
dkp->ns_rngstate[i].value.c,
"online");
break;
case CTL_STATE_UNCONFIGURED:
(void) strcpy(
dkp->ns_rngstate[i].value.c,
"offline");
break;
default:
(void) strcpy(
dkp->ns_rngstate[i].value.c,
"unknown");
break;
}
for (j = 0; j < N2RNG_NOSC; j++) {
dkp->ns_rngbias[i][j].value.ull =
rng->n_bias_info[j].bias;
dkp->ns_rngentropy[i][j].value.ull =
rng->n_bias_info[j].entropy;
}
}
}
}
return (0);
}
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