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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 2005 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/param.h>
#include <sys/systm.h>
#include <sys/kmem.h>
#include <sys/cpu.h>
#include <sys/sunddi.h>
#include <sys/ddi_impldefs.h>
#include <sys/pte.h>
#include <sys/machsystm.h>
#include <sys/mmu.h>
#include <sys/dvma.h>
#include <sys/debug.h>
#define HD ((ddi_dma_impl_t *)h)->dmai_rdip
unsigned long
dvma_pagesize(dev_info_t *dip)
{
auto unsigned long dvmapgsz;
(void) ddi_ctlops(dip, dip, DDI_CTLOPS_DVMAPAGESIZE,
NULL, (void *) &dvmapgsz);
return (dvmapgsz);
}
int
dvma_reserve(dev_info_t *dip, ddi_dma_lim_t *limp, uint_t pages,
ddi_dma_handle_t *handlep)
{
auto ddi_dma_lim_t dma_lim;
auto ddi_dma_impl_t implhdl;
struct ddi_dma_req dmareq;
ddi_dma_handle_t reqhdl;
ddi_dma_impl_t *mp;
int ret;
if (limp == (ddi_dma_lim_t *)0) {
return (DDI_DMA_BADLIMITS);
} else {
dma_lim = *limp;
}
bzero(&dmareq, sizeof (dmareq));
dmareq.dmar_fp = DDI_DMA_DONTWAIT;
dmareq.dmar_flags = DDI_DMA_RDWR | DDI_DMA_STREAMING;
dmareq.dmar_limits = &dma_lim;
dmareq.dmar_object.dmao_size = pages;
/*
* pass in a dummy handle. This avoids the problem when
* somebody is dereferencing the handle before checking
* the operation. This can be avoided once we separate
* handle allocation and actual operation.
*/
bzero((caddr_t)&implhdl, sizeof (ddi_dma_impl_t));
reqhdl = (ddi_dma_handle_t)&implhdl;
ret = ddi_dma_mctl(dip, dip, reqhdl, DDI_DMA_RESERVE, (off_t *)&dmareq,
0, (caddr_t *)handlep, 0);
if (ret == DDI_SUCCESS) {
mp = (ddi_dma_impl_t *)(*handlep);
if (!(mp->dmai_rflags & DMP_BYPASSNEXUS)) {
uint_t np = mp->dmai_ndvmapages;
mp->dmai_mapping = (ulong_t)kmem_alloc(
sizeof (ddi_dma_lim_t), KM_SLEEP);
bcopy((char *)&dma_lim, (char *)mp->dmai_mapping,
sizeof (ddi_dma_lim_t));
mp->dmai_minfo = kmem_alloc(
np * sizeof (ddi_dma_handle_t), KM_SLEEP);
}
}
return (ret);
}
void
dvma_release(ddi_dma_handle_t h)
{
ddi_dma_impl_t *mp = (ddi_dma_impl_t *)h;
uint_t np = mp->dmai_ndvmapages;
if (!(mp->dmai_rflags & DMP_BYPASSNEXUS)) {
kmem_free((void *)mp->dmai_mapping, sizeof (ddi_dma_lim_t));
kmem_free(mp->dmai_minfo, np * sizeof (ddi_dma_handle_t));
}
(void) ddi_dma_mctl(HD, HD, h, DDI_DMA_RELEASE, 0, 0, 0, 0);
}
void
dvma_kaddr_load(ddi_dma_handle_t h, caddr_t a, uint_t len, uint_t index,
ddi_dma_cookie_t *cp)
{
register ddi_dma_impl_t *mp = (ddi_dma_impl_t *)h;
struct fast_dvma *nexus_private;
struct dvma_ops *nexus_funcptr;
ddi_dma_attr_t dma_attr;
uint_t ccnt;
if (mp->dmai_rflags & DMP_BYPASSNEXUS) {
nexus_private = (struct fast_dvma *)mp->dmai_nexus_private;
nexus_funcptr = (struct dvma_ops *)nexus_private->ops;
(void) (*nexus_funcptr->dvma_kaddr_load)(h, a, len, index, cp);
} else {
ddi_dma_handle_t handle;
ddi_dma_lim_t *limp;
limp = (ddi_dma_lim_t *)mp->dmai_mapping;
dma_attr.dma_attr_version = DMA_ATTR_V0;
dma_attr.dma_attr_addr_lo = limp->dlim_addr_lo;
dma_attr.dma_attr_addr_hi = limp->dlim_addr_hi;
dma_attr.dma_attr_count_max = limp->dlim_cntr_max;
dma_attr.dma_attr_align = 1;
dma_attr.dma_attr_burstsizes = limp->dlim_burstsizes;
dma_attr.dma_attr_minxfer = limp->dlim_minxfer;
dma_attr.dma_attr_maxxfer = 0xFFFFFFFFull;
dma_attr.dma_attr_seg = 0xFFFFFFFFull;
dma_attr.dma_attr_sgllen = 1;
dma_attr.dma_attr_granular = 1;
dma_attr.dma_attr_flags = 0;
(void) ddi_dma_alloc_handle(HD, &dma_attr, DDI_DMA_SLEEP, NULL,
&handle);
(void) ddi_dma_addr_bind_handle(handle, NULL, a, len,
DDI_DMA_RDWR, DDI_DMA_SLEEP, NULL, cp, &ccnt);
((ddi_dma_handle_t *)mp->dmai_minfo)[index] = handle;
}
}
/*ARGSUSED*/
void
dvma_unload(ddi_dma_handle_t h, uint_t objindex, uint_t type)
{
register ddi_dma_impl_t *mp = (ddi_dma_impl_t *)h;
struct fast_dvma *nexus_private;
struct dvma_ops *nexus_funcptr;
if (mp->dmai_rflags & DMP_BYPASSNEXUS) {
nexus_private = (struct fast_dvma *)mp->dmai_nexus_private;
nexus_funcptr = (struct dvma_ops *)nexus_private->ops;
(void) (*nexus_funcptr->dvma_unload)(h, objindex, type);
} else {
ddi_dma_handle_t handle;
handle = ((ddi_dma_handle_t *)mp->dmai_minfo)[objindex];
(void) ddi_dma_unbind_handle(handle);
(void) ddi_dma_free_handle(&handle);
}
}
void
dvma_sync(ddi_dma_handle_t h, uint_t objindex, uint_t type)
{
register ddi_dma_impl_t *mp = (ddi_dma_impl_t *)h;
struct fast_dvma *nexus_private;
struct dvma_ops *nexus_funcptr;
if (mp->dmai_rflags & DMP_BYPASSNEXUS) {
nexus_private = (struct fast_dvma *)mp->dmai_nexus_private;
nexus_funcptr = (struct dvma_ops *)nexus_private->ops;
(void) (*nexus_funcptr->dvma_sync)(h, objindex, type);
} else {
ddi_dma_handle_t handle;
handle = ((ddi_dma_handle_t *)mp->dmai_minfo)[objindex];
(void) ddi_dma_sync(handle, 0, 0, type);
}
}
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