/*
* 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"
/*
* clone of ddi_segmap_setup(). Respects the requested cache
* attributes so hat_devload() gives user space WC and
* UC mappings for system memory.
*/
/*ARGSUSED*/
int
gfxp_ddi_segmap_setup(dev_t dev, off_t offset, struct as *as, caddr_t *addrp,
off_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cred,
ddi_device_acc_attr_t *accattrp, uint_t rnumber)
{
struct segdev_crargs dev_a;
int (*mapfunc)(dev_t dev, off_t off, int prot);
uint_t hat_attr;
pfn_t pfn;
int error, i;
if ((mapfunc = devopsp[getmajor(dev)]->devo_cb_ops->cb_mmap) == nodev)
return (ENODEV);
/*
* Character devices that support the d_mmap
* interface can only be mmap'ed shared.
*/
if ((flags & MAP_TYPE) != MAP_SHARED)
return (EINVAL);
/*
* Check that this region is indeed mappable on this platform.
* Use the mapping function.
*/
if (ddi_device_mapping_check(dev, accattrp, rnumber, &hat_attr) == -1)
return (ENXIO);
if (accattrp != NULL) {
switch (accattrp->devacc_attr_dataorder) {
case DDI_STRICTORDER_ACC:
/* Want UC */
hat_attr &= ~HAT_ORDER_MASK;
hat_attr |= (HAT_STRICTORDER | HAT_PLAT_NOCACHE);
break;
case DDI_MERGING_OK_ACC:
/* Want WC */
hat_attr &= ~HAT_ORDER_MASK;
hat_attr |= (HAT_MERGING_OK | HAT_PLAT_NOCACHE);
break;
}
}
/*
* Check to ensure that the entire range is
* legal and we are not trying to map in
* more than the device will let us.
*/
for (i = 0; i < len; i += PAGESIZE) {
if (i == 0) {
/*
* Save the pfn at offset here. This pfn will be
* used later to get user address.
*/
if ((pfn = (pfn_t)cdev_mmap(mapfunc, dev, offset,
maxprot)) == PFN_INVALID)
return (ENXIO);
} else {
if (cdev_mmap(mapfunc, dev, offset + i, maxprot) ==
PFN_INVALID)
return (ENXIO);
}
}
as_rangelock(as);
if ((flags & MAP_FIXED) == 0) {
/*
* Pick an address w/o worrying about
* any vac alignment constraints.
*/
map_addr(addrp, len, ptob(pfn), 0, flags);
if (*addrp == NULL) {
as_rangeunlock(as);
return (ENOMEM);
}
} else {
/*
* User-specified address; blow away any previous mappings.
*/
(void) as_unmap(as, *addrp, len);
}
dev_a.mapfunc = mapfunc;
dev_a.dev = dev;
dev_a.offset = (offset_t)offset;
dev_a.type = flags & MAP_TYPE;
dev_a.prot = (uchar_t)prot;
dev_a.maxprot = (uchar_t)maxprot;
dev_a.hat_attr = hat_attr;
#if DEBUG
dev_a.hat_flags = 0;
#else
dev_a.hat_flags = HAT_LOAD_LOCK;
#endif
dev_a.devmap_data = NULL;
error = as_map(as, *addrp, len, segdev_create, &dev_a);
as_rangeunlock(as);
return (error);
}