io/gfx_private/gfxp_devmap.c

	gfxp_devmap.c revision 7b93957c241820af312fd1aad1e23e305a8dabbf
/*
 * 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/debug.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/buf.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/signal.h>
#include <vm/page.h>
#include <vm/as.h>
#include <vm/hat.h>
#include <vm/seg.h>
#include <vm/seg_dev.h>
#include <vm/hat_i86.h>
#include <sys/ddi.h>
#include <sys/devops.h>
#include <sys/sunddi.h>
#include <sys/ddi_impldefs.h>
#include <sys/fs/snode.h>
#include <sys/pci.h>
#include <sys/vmsystm.h>
#include "gfx_private.h"

/*
 * Create a dummy ddi_umem_cookie given to gfxp_devmap_umem_setup().
 */
ddi_umem_cookie_t
gfxp_umem_cookie_init(caddr_t kva, size_t size)
{
    struct ddi_umem_cookie *umem_cookie;

    umem_cookie = kmem_zalloc(sizeof (struct ddi_umem_cookie), KM_SLEEP);

    if (umem_cookie == NULL)
        return (NULL);

    umem_cookie->cvaddr = kva;
    umem_cookie->type = KMEM_NON_PAGEABLE;
    umem_cookie->size = size;

    return ((ddi_umem_cookie_t *)umem_cookie);
}

void
gfxp_umem_cookie_destroy(ddi_umem_cookie_t cookie)
{
    kmem_free(cookie, sizeof (struct ddi_umem_cookie));
}

/*
 * called by driver devmap routine to pass kernel virtual address mapping
 * info to the framework.
 */
/*ARGSUSED*/
int
gfxp_devmap_umem_setup(devmap_cookie_t dhc, dev_info_t *dip,
    struct devmap_callback_ctl *callbackops, ddi_umem_cookie_t cookie,
    offset_t off, size_t len, uint_t maxprot, uint_t flags,
    ddi_device_acc_attr_t *accattrp)
{
    uint_t l_flags = flags & ~IOMEM_DATA_MASK; /* clear cache attrs */
    int e;

    /*
     * Set an appropriate attribute from devacc_attr_dataorder
     * to keep compatibility. The cache attributes are igonred
     * if specified.
     */
    if (accattrp != NULL) {
        if (accattrp->devacc_attr_dataorder == DDI_STRICTORDER_ACC) {
            l_flags |= IOMEM_DATA_UNCACHED;
        } else if (accattrp->devacc_attr_dataorder ==
            DDI_MERGING_OK_ACC) {
            l_flags |= IOMEM_DATA_UC_WR_COMBINE;
        } else {
            l_flags |= IOMEM_DATA_CACHED;
        }
    }

    e = devmap_umem_setup(dhc, dip, callbackops, cookie, off, len, maxprot,
        l_flags, accattrp);
    return (e);
}