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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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* HBA to MSCSI BUS nexus driver
*/
/*
* Many newer hba drivers must support multiple scsi-busses. This
* simple, generic nexus driver can be used to create separate instances
* for each scsi-bus, using the following procedure:
*
* 1) hba-parent (mscsi bus driver child attaches to hba driver parent)
* -------------
*
* a) Set the class of the parent hba driver to "mscsi" (note that
* PSARC approval of the mscsi class must precede this usage).
* b) Set the class of the mscsi bus driver to "scsi"
* c) Place entries in mscsi.conf for each scsi-bus
*
* name="mscsi" class="mscsi" reg=N,0,0 mscsi-bus=N
*
* where N is the required scsi-bus number.
*
* 4) Place special mscsi_hba_* routines in the parent hba driver
* to properly initialize these mscsi_bus nodes to passthru
* SCSA requests. The following properties control the operation
* of the mscsi bus nexus driver.
*
* MSCSI_BUSPROP When set on devinfo node, indicates which
* scsi bus is attaching to an hba-parent.
*
* MSCSI_CALLPROP When set on parent devinfo node, indicates the
* hba-parent requests callbacks through parent
* dev_ops entries to perform initialization, etc.
*/
#include <sys/types.h>
#include <sys/cmn_err.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/ddi_impldefs.h>
#include <sys/debug.h>
#include <sys/modctl.h>
#include <sys/scsi/scsi.h>
#include <sys/dktp/mscsi.h>
char _depends_on[] = "misc/scsi";
int mscsi_forceload = 0;
static int mscsi_probe(dev_info_t *);
static int mscsi_attach(dev_info_t *devi, ddi_attach_cmd_t cmd);
static int mscsi_detach(dev_info_t *devi, ddi_detach_cmd_t cmd);
static int mscsi_reset(dev_info_t *devi, ddi_reset_cmd_t cmd);
static int mscsi_info(dev_info_t *dip, ddi_info_cmd_t infocmd,
void *arg, void **result);
struct dev_ops mscsi_ops = {
DEVO_REV, /* devo_rev */
0, /* refcnt */
mscsi_info, /* info */
nulldev, /* identify */
mscsi_probe, /* probe */
mscsi_attach, /* attach */
mscsi_detach, /* detach */
mscsi_reset, /* reset */
(struct cb_ops *)0, /* driver operations */
NULL, /* bus operations */
NULL /* power operations */
};
/*
* Module linkage information for the kernel.
*/
static struct modldrv modldrv = {
&mod_driverops, /* Type of module */
"scsi mscsi_bus nexus driver %I%",
&mscsi_ops, /* driver ops */
};
static struct modlinkage modlinkage = {
MODREV_1,
(void *)&modldrv,
NULL
};
int
_init(void)
{
int status;
if ((status = scsi_hba_init(&modlinkage)) != 0)
return (status);
if ((status = mod_install(&modlinkage)) != 0) {
scsi_hba_fini(&modlinkage);
return (status);
}
return (status);
}
int
_fini(void)
{
int status;
if ((status = mod_remove(&modlinkage)) == 0)
scsi_hba_fini(&modlinkage);
return (status);
}
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
/*ARGSUSED*/
static int
mscsi_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
{
return (DDI_FAILURE);
}
static int
mscsi_callback(register dev_info_t *devi)
{
int mscsi_call;
int proplen;
/*
* Check if MSCSI_CALLPROP property is set on parent.
* And if so prepare to call parent ops entries.
*/
proplen = sizeof (mscsi_call);
if (ddi_getlongprop_buf(DDI_DEV_T_ANY, devi,
DDI_PROP_DONTPASS, MSCSI_CALLPROP, (caddr_t)&mscsi_call,
&proplen) != DDI_PROP_SUCCESS)
return (DDI_FAILURE);
return (DDI_SUCCESS);
}
/*ARGSUSED*/
static int
mscsi_probe(register dev_info_t *devi)
{
/* check for forced probe failure */
if (mscsi_forceload < 0)
return (DDI_PROBE_FAILURE);
return (DDI_PROBE_SUCCESS);
}
/*ARGSUSED*/
static int
mscsi_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
{
dev_info_t *pdevi = ddi_get_parent(devi);
/*
* Callback parent dev_ops if parent requests it.
*/
if (mscsi_callback(pdevi) == DDI_SUCCESS)
return ((DEVI(pdevi)->devi_ops->devo_attach)(devi, cmd));
(void) ddi_prop_update_string(DDI_DEV_T_NONE, devi,
"mbus_type", MSCSI_NAME);
ddi_report_dev(devi);
return (DDI_SUCCESS);
}
/*ARGSUSED*/
static int
mscsi_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
{
dev_info_t *pdevi = ddi_get_parent(devi);
if (mscsi_callback(pdevi) == DDI_SUCCESS)
return ((DEVI(pdevi)->devi_ops->devo_detach)(devi, cmd));
return (DDI_SUCCESS);
}
/*ARGSUSED*/
static int
mscsi_reset(dev_info_t *devi, ddi_reset_cmd_t cmd)
{
dev_info_t *pdevi = ddi_get_parent(devi);
if (mscsi_callback(pdevi) == DDI_SUCCESS)
return ((DEVI(pdevi)->devi_ops->devo_reset)(devi, cmd));
return (DDI_SUCCESS);
}
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