xref: /illumos-gate/usr/src/uts/common/os/ddi_intr_impl.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <sys/note.h>
#include <sys/sysmacros.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kmem.h>
#include <sys/cmn_err.h>
#include <sys/debug.h>
#include <sys/avintr.h>
#include <sys/autoconf.h>
#include <sys/sunndi.h>
#include <sys/ndi_impldefs.h>	/* include prototypes */

/*
 * New DDI interrupt framework
 */
void
i_ddi_intr_devi_init(dev_info_t *dip)
{
	int	supported_types;

	DDI_INTR_APIDBG((CE_CONT, "i_ddi_intr_devi_init: dip %p\n",
	    (void *)dip));

	if (DEVI(dip)->devi_intr_p)
		return;

	DEVI(dip)->devi_intr_p = kmem_zalloc(sizeof (devinfo_intr_t),
	    KM_SLEEP);

	supported_types = i_ddi_intr_get_supported_types(dip);

	/* Save supported interrupt types information */
	i_ddi_intr_set_supported_types(dip, supported_types);
}

void
i_ddi_intr_devi_fini(dev_info_t *dip)
{
	devinfo_intr_t	*intr_p = DEVI(dip)->devi_intr_p;

	/*
	 * devi_intr_handle_p will only be used for devices
	 * which are using the legacy DDI Interrupt interfaces.
	 */
	if (intr_p->devi_intr_handle_p) {
		/* nintrs could be zero; so check for it first */
		if (intr_p->devi_intr_sup_nintrs) {
			kmem_free(intr_p->devi_intr_handle_p,
			    intr_p->devi_intr_sup_nintrs *
			    sizeof (ddi_intr_handle_t));
		}
	}
	kmem_free(DEVI(dip)->devi_intr_p, sizeof (devinfo_intr_t));
	DEVI(dip)->devi_intr_p = NULL;
}

uint_t
i_ddi_intr_get_supported_types(dev_info_t *dip)
{
	devinfo_intr_t		*intr_p = DEVI(dip)->devi_intr_p;
	ddi_intr_handle_impl_t	hdl;
	int			ret, intr_types;

	if ((intr_p) && (intr_p->devi_intr_sup_types))
		return (intr_p->devi_intr_sup_types);

	bzero(&hdl, sizeof (ddi_intr_handle_impl_t));
	hdl.ih_dip = dip;

	ret = i_ddi_handle_intr_ops(dip, dip, DDI_INTROP_SUPPORTED_TYPES, &hdl,
	    (void *)&intr_types);

	return ((ret == DDI_SUCCESS) ? intr_types : 0);
}

/*
 * NOTE: This function is only called by i_ddi_dev_init().
 */
void
i_ddi_intr_set_supported_types(dev_info_t *dip, int intr_types)
{
	devinfo_intr_t		*intr_p = DEVI(dip)->devi_intr_p;

	if (intr_p)
		intr_p->devi_intr_sup_types = intr_types;
}

uint_t
i_ddi_intr_get_supported_nintrs(dev_info_t *dip, int intr_type)
{
	devinfo_intr_t		*intr_p = DEVI(dip)->devi_intr_p;
	ddi_intr_handle_impl_t	hdl;
	int			ret, nintrs;

	if ((intr_p) && (intr_p->devi_intr_curr_type == intr_type) &&
	    (intr_p->devi_intr_sup_nintrs))
		return (intr_p->devi_intr_sup_nintrs);

	bzero(&hdl, sizeof (ddi_intr_handle_impl_t));
	hdl.ih_dip = dip;
	hdl.ih_type = intr_type;

	ret = i_ddi_handle_intr_ops(dip, dip, DDI_INTROP_NINTRS, &hdl,
	    (void *)&nintrs);

	return ((ret == DDI_SUCCESS) ? nintrs : 0);
}

/*
 * NOTE: This function is only called by ddi_intr_alloc().
 */
void
i_ddi_intr_set_supported_nintrs(dev_info_t *dip, int nintrs)
{
	devinfo_intr_t *intr_p = DEVI(dip)->devi_intr_p;

	if (intr_p)
		intr_p->devi_intr_sup_nintrs = nintrs;
}

uint_t
i_ddi_intr_get_current_type(dev_info_t *dip)
{
	devinfo_intr_t *intr_p = DEVI(dip)->devi_intr_p;

	return (intr_p ? intr_p->devi_intr_curr_type : 0);
}

/*
 * NOTE: This function is only called by
 *       ddi_intr_alloc() and ddi_intr_free().
 */
void
i_ddi_intr_set_current_type(dev_info_t *dip, int intr_type)
{
	devinfo_intr_t *intr_p = DEVI(dip)->devi_intr_p;

	if (intr_p)
		intr_p->devi_intr_curr_type = intr_type;
}

uint_t
i_ddi_intr_get_current_nintrs(dev_info_t *dip)
{
	devinfo_intr_t *intr_p = DEVI(dip)->devi_intr_p;

	return (intr_p ? intr_p->devi_intr_curr_nintrs : 0);
}

/*
 * NOTE: This function is only called by
 *       ddi_intr_alloc() and ddi_intr_free().
 */
void
i_ddi_intr_set_current_nintrs(dev_info_t *dip, int nintrs)
{
	devinfo_intr_t *intr_p = DEVI(dip)->devi_intr_p;

	if (intr_p)
		intr_p->devi_intr_curr_nintrs = nintrs;
}

ddi_intr_msix_t *
i_ddi_get_msix(dev_info_t *dip)
{
	devinfo_intr_t *intr_p = DEVI(dip)->devi_intr_p;

	return (intr_p ? intr_p->devi_msix_p : NULL);
}

void
i_ddi_set_msix(dev_info_t *dip, ddi_intr_msix_t *msix_p)
{
	devinfo_intr_t *intr_p = DEVI(dip)->devi_intr_p;

	if (intr_p)
		intr_p->devi_msix_p = msix_p;
}

ddi_intr_handle_t *
i_ddi_get_intr_handle(dev_info_t *dip, int inum)
{
	devinfo_intr_t *intr_p = DEVI(dip)->devi_intr_p;

	if (intr_p == NULL)
		return (NULL);

	ASSERT((inum >= 0) && (inum < intr_p->devi_intr_sup_nintrs));

	return ((intr_p->devi_intr_handle_p) ?
	    intr_p->devi_intr_handle_p[inum] : NULL);
}

void
i_ddi_set_intr_handle(dev_info_t *dip, int inum,
    ddi_intr_handle_t *intr_hdlp)
{
	devinfo_intr_t	*intr_p = DEVI(dip)->devi_intr_p;

	if (intr_p == NULL)
		return;

	ASSERT((inum >= 0) && (inum < intr_p->devi_intr_sup_nintrs));

	if (intr_p->devi_intr_handle_p == NULL) {
		/* nintrs could be zero; so check for it first */
		if (intr_p->devi_intr_sup_nintrs)
			intr_p->devi_intr_handle_p = kmem_zalloc(
			    sizeof (ddi_intr_handle_t) *
			    intr_p->devi_intr_sup_nintrs, KM_SLEEP);
	}

	intr_p->devi_intr_handle_p[inum] = intr_hdlp;
}

/*
 * The "ddi-intr-weight" property contains the weight of each interrupt
 * associated with a dev_info node. For devices with multiple interrupts per
 * dev_info node, the total load of the device is "devi_intr_weight * nintr",
 * possibly spread out over multiple CPUs.
 *
 * Maintaining this as a property permits possible tweaking in the product
 * in response to customer problems via driver.conf property definitions at
 * the driver or the instance level.  This does not mean that "ddi-intr_weight"
 * is a formal or committed interface.
 */
int32_t
i_ddi_get_intr_weight(dev_info_t *dip)
{
	int32_t	weight;

	weight = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
	    DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "ddi-intr-weight", -1);
	if (weight < -1)
		weight = -1;			/* undefined */
	return (weight);
}

int32_t
i_ddi_set_intr_weight(dev_info_t *dip, int32_t weight)
{
	int32_t oweight;

	oweight = i_ddi_get_intr_weight(dip);
	if ((weight > 0) && (oweight != weight))
		(void) ndi_prop_update_int(DDI_DEV_T_NONE, dip,
		    "ddi-intr-weight", weight);
	return (oweight);
}

/*
 * Old DDI interrupt framework
 *
 * NOTE:
 *	The following 4 busops entry points are obsoleted with version
 *	9 or greater. Use i_ddi_intr_op interface in place of these
 *	obsolete interfaces.
 *
 *	Remove these busops entry points and all related data structures
 *	in future major/minor solaris release.
 */

/* ARGSUSED */
ddi_intrspec_t
i_ddi_get_intrspec(dev_info_t *dip, dev_info_t *rdip, uint_t inumber)
{
	dev_info_t	*pdip = ddi_get_parent(dip);

	cmn_err(CE_WARN, "Failed to process interrupt "
	    "for %s%d due to down-rev nexus driver %s%d",
	    ddi_get_name(rdip), ddi_get_instance(rdip),
	    ddi_get_name(pdip), ddi_get_instance(pdip));

	return (NULL);
}

/* ARGSUSED */
int
i_ddi_add_intrspec(dev_info_t *dip, dev_info_t *rdip, ddi_intrspec_t intrspec,
    ddi_iblock_cookie_t *iblock_cookiep,
    ddi_idevice_cookie_t *idevice_cookiep,
    uint_t (*int_handler)(caddr_t int_handler_arg),
    caddr_t int_handler_arg, int kind)
{
	dev_info_t	*pdip = ddi_get_parent(dip);

	cmn_err(CE_WARN, "Failed to process interrupt "
	    "for %s%d due to down-rev nexus driver %s%d",
	    ddi_get_name(rdip), ddi_get_instance(rdip),
	    ddi_get_name(pdip), ddi_get_instance(pdip));

	return (DDI_ENOTSUP);
}

/* ARGSUSED */
void
i_ddi_remove_intrspec(dev_info_t *dip, dev_info_t *rdip,
    ddi_intrspec_t intrspec, ddi_iblock_cookie_t iblock_cookie)
{
	dev_info_t	*pdip = ddi_get_parent(dip);

	cmn_err(CE_WARN, "Failed to process interrupt "
	    "for %s%d due to down-rev nexus driver %s%d",
	    ddi_get_name(rdip), ddi_get_instance(rdip),
	    ddi_get_name(pdip), ddi_get_instance(pdip));
}

/* ARGSUSED */
int
i_ddi_intr_ctlops(dev_info_t *dip, dev_info_t *rdip, ddi_intr_ctlop_t op,
    void *arg, void *val)
{
	dev_info_t	*pdip = ddi_get_parent(dip);

	cmn_err(CE_WARN, "Failed to process interrupt "
	    "for %s%d due to down-rev nexus driver %s%d",
	    ddi_get_name(rdip), ddi_get_instance(rdip),
	    ddi_get_name(pdip), ddi_get_instance(pdip));

	return (DDI_ENOTSUP);
}