simmstat.c revision 447e4a639cd3f814fbae624e7188d5adaa83f841
/*
* 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 2006 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/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/ddi_impldefs.h>
#include <sys/obpdefs.h>
#include <sys/cmn_err.h>
#include <sys/errno.h>
#include <sys/kmem.h>
#include <sys/debug.h>
#include <sys/sysmacros.h>
#include <sys/ivintr.h>
#include <sys/intr.h>
#include <sys/intreg.h>
#include <sys/autoconf.h>
#include <sys/modctl.h>
#include <sys/spl.h>
#include <sys/fhc.h>
#include <sys/simmstat.h>
/* Useful debugging Stuff */
#include <sys/nexusdebug.h>
/*
* Function prototypes
*/
static int simmstat_attach(dev_info_t *, ddi_attach_cmd_t);
static int simmstat_detach(dev_info_t *, ddi_detach_cmd_t);
static void simmstat_add_kstats(struct simmstat_soft_state *);
static int simmstat_kstat_update(kstat_t *, int);
/*
* Configuration data structures
*/
static struct cb_ops simmstat_cb_ops = {
nulldev, /* open */
nulldev, /* close */
nulldev, /* strategy */
nulldev, /* print */
nodev, /* dump */
nulldev, /* read */
nulldev, /* write */
nulldev, /* ioctl */
nodev, /* devmap */
nodev, /* mmap */
nodev, /* segmap */
nochpoll, /* poll */
ddi_prop_op, /* cb_prop_op */
0, /* streamtab */
D_MP | D_NEW | D_HOTPLUG, /* Driver compatibility flag */
CB_REV, /* rev */
nodev, /* cb_aread */
nodev /* cb_awrite */
};
static struct dev_ops simmstat_ops = {
DEVO_REV, /* rev */
0, /* refcnt */
ddi_no_info, /* getinfo */
nulldev, /* identify */
nulldev, /* probe */
simmstat_attach, /* attach */
simmstat_detach, /* detach */
nulldev, /* reset */
&simmstat_cb_ops, /* cb_ops */
(struct bus_ops *)0, /* bus_ops */
nulldev /* power */
};
static uint_t simmstat_reg_read_delay_us = 10;
/*
* Driver globals
*/
void *simmstatp;
extern struct mod_ops mod_driverops;
static struct modldrv modldrv = {
&mod_driverops, /* module type, this one is a driver */
"SIMM-status Leaf v%I%", /* module name */
&simmstat_ops, /* driver ops */
};
static struct modlinkage modlinkage = {
MODREV_1, /* rev */
(void *)&modldrv,
NULL
};
#ifndef lint
char _depends_on[] = "drv/fhc";
#endif /* lint */
/*
* These are the module initialization routines.
*/
int
_init(void)
{
int error;
if ((error = ddi_soft_state_init(&simmstatp,
sizeof (struct simmstat_soft_state), 1)) != 0)
return (error);
return (mod_install(&modlinkage));
}
int
_fini(void)
{
int error;
if ((error = mod_remove(&modlinkage)) != 0)
return (error);
ddi_soft_state_fini(&simmstatp);
return (0);
}
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
static int
simmstat_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
{
struct simmstat_soft_state *softsp;
int instance;
switch (cmd) {
case DDI_ATTACH:
break;
case DDI_RESUME:
return (DDI_SUCCESS);
default:
return (DDI_FAILURE);
}
instance = ddi_get_instance(devi);
if (ddi_soft_state_zalloc(simmstatp, instance) != DDI_SUCCESS)
return (DDI_FAILURE);
softsp = ddi_get_soft_state(simmstatp, instance);
/* Set the dip in the soft state */
softsp->dip = devi;
/* Get the board number from this nodes parent device. */
softsp->pdip = ddi_get_parent(softsp->dip);
if ((softsp->board = (int)ddi_getprop(DDI_DEV_T_ANY, softsp->pdip,
DDI_PROP_DONTPASS, OBP_BOARDNUM, -1)) == -1) {
cmn_err(CE_WARN, "simmstat%d: unable to retrieve %s property",
instance, OBP_BOARDNUM);
goto bad;
}
DPRINTF(SIMMSTAT_ATTACH_DEBUG, ("simmstat%d: devi= 0x%p\n, "
" softsp=0x%p\n", instance, devi, softsp));
/* map in the registers for this device. */
if (ddi_map_regs(softsp->dip, 0,
(caddr_t *)&softsp->simmstat_base, 0, 0)) {
cmn_err(CE_WARN, "simmstat%d: unable to map registers",
instance);
goto bad;
}
/* nothing to suspend/resume here */
(void) ddi_prop_update_string(DDI_DEV_T_NONE, devi,
"pm-hardware-state", "no-suspend-resume");
/* create the kstats for this device */
simmstat_add_kstats(softsp);
ddi_report_dev(devi);
return (DDI_SUCCESS);
bad:
ddi_soft_state_free(simmstatp, instance);
return (DDI_FAILURE);
}
/* ARGSUSED */
static int
simmstat_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
{
int instance;
struct simmstat_soft_state *softsp;
/* get the instance of this devi */
instance = ddi_get_instance(devi);
/* get the soft state pointer for this device node */
softsp = ddi_get_soft_state(simmstatp, instance);
switch (cmd) {
case DDI_SUSPEND:
return (DDI_SUCCESS);
case DDI_DETACH:
(void) fhc_bdlist_lock(softsp->board);
if (fhc_bd_detachable(softsp->board))
break;
else
fhc_bdlist_unlock();
/* FALLTHROUGH */
default:
return (DDI_FAILURE);
}
fhc_bdlist_unlock();
/* remove the kstat for this board */
kstat_delete(softsp->simmstat_ksp);
/* unmap the registers */
ddi_unmap_regs(softsp->dip, 0,
(caddr_t *)&softsp->simmstat_base, 0, 0);
/* free up the soft state */
ddi_soft_state_free(simmstatp, instance);
ddi_prop_remove_all(devi);
return (DDI_SUCCESS);
}
static void
simmstat_add_kstats(struct simmstat_soft_state *softsp)
{
struct kstat *simmstat_ksp;
if ((simmstat_ksp = kstat_create("unix", softsp->board,
SIMMSTAT_KSTAT_NAME, "misc", KSTAT_TYPE_RAW,
SIMM_COUNT, KSTAT_FLAG_PERSISTENT)) == NULL) {
cmn_err(CE_WARN, "simmstat%d: kstat_create failed",
ddi_get_instance(softsp->dip));
}
simmstat_ksp->ks_update = simmstat_kstat_update;
simmstat_ksp->ks_private = (void *)softsp;
softsp->simmstat_ksp = simmstat_ksp;
kstat_install(simmstat_ksp);
}
/*
* Kstats only need ks_update functions when they change dynamically
* at run time.
* In the case of the simmstat registers, they contain battery
* information for NVSIMMs. These need to be updated whenever a
* kstat_read asks for the data. There is currently no plan to
* ship NVSIMMs on this platform, but this support must be present.
*/
static int
simmstat_kstat_update(kstat_t *ksp, int rw)
{
struct simmstat_soft_state *softsp;
volatile char *statp; /* pointer to hardware register */
char *kstatp; /* pointer to kstat data buffer */
int i;
kstatp = (char *)ksp->ks_data;
softsp = (struct simmstat_soft_state *)ksp->ks_private;
statp = (char *)softsp->simmstat_base;
/* this is a read-only kstat. Bail out on a write */
if (rw == KSTAT_WRITE) {
return (EACCES);
} else {
/*
* copy current status of hardware into the kstat
* structure.
*/
for (i = 0; i < SIMM_COUNT; i++, statp++, kstatp++) {
*kstatp = *statp;
DELAY(simmstat_reg_read_delay_us);
}
}
return (0);
}