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/* $OpenBSD: tc_dma_3000_500.c,v 1.1 2002/05/02 22:56:06 miod Exp $ */
/* $NetBSD: tc_dma_3000_500.c,v 1.13 2001/07/19 06:40:03 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#define _ALPHA_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <machine/bus.h>
#include <dev/tc/tcvar.h>
#include <alpha/tc/tc_sgmap.h>
#include <alpha/tc/tc_dma_3000_500.h>
struct alpha_bus_dma_tag tc_dmat_sgmap = {
NULL, /* _cookie */
0, /* _wbase */
0, /* _wsize */
NULL, /* _next_window */
0, /* _boundary */
NULL, /* _sgmap */
NULL, /* _get_tag */
tc_bus_dmamap_create_sgmap,
tc_bus_dmamap_destroy_sgmap,
tc_bus_dmamap_load_sgmap,
tc_bus_dmamap_load_mbuf_sgmap,
tc_bus_dmamap_load_uio_sgmap,
tc_bus_dmamap_load_raw_sgmap,
tc_bus_dmamap_unload_sgmap,
_bus_dmamap_sync,
_bus_dmamem_alloc,
_bus_dmamem_free,
_bus_dmamem_map,
_bus_dmamem_unmap,
_bus_dmamem_mmap,
};
struct tc_dma_slot_info {
struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */
struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */
};
struct tc_dma_slot_info *tc_dma_slot_info;
void
tc_dma_init_3000_500(nslots)
int nslots;
{
extern struct alpha_bus_dma_tag tc_dmat_direct;
size_t sisize;
int i;
/* Allocate per-slot DMA info. */
sisize = nslots * sizeof(struct tc_dma_slot_info);
tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT);
if (tc_dma_slot_info == NULL)
panic("tc_dma_init: can't allocate per-slot DMA info");
memset(tc_dma_slot_info, 0, sisize);
/* Default all slots to direct-mapped. */
for (i = 0; i < nslots; i++)
memcpy(&tc_dma_slot_info[i].tdsi_dmat, &tc_dmat_direct,
sizeof(tc_dma_slot_info[i].tdsi_dmat));
}
/*
* Return the DMA tag for the given slot.
*/
bus_dma_tag_t
tc_dma_get_tag_3000_500(slot)
int slot;
{
return (&tc_dma_slot_info[slot].tdsi_dmat);
}
/*
* Create a TurboChannel SGMAP-mapped DMA map.
*/
int
tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary,
flags, dmamp)
bus_dma_tag_t t;
bus_size_t size;
int nsegments;
bus_size_t maxsegsz;
bus_size_t boundary;
int flags;
bus_dmamap_t *dmamp;
{
bus_dmamap_t map;
int error;
error = _bus_dmamap_create(t, size, nsegments, maxsegsz,
boundary, flags, dmamp);
if (error)
return (error);
map = *dmamp;
/* XXX BUS_DMA_ALLOCNOW */
return (error);
}
/*
* Destroy a TurboChannel SGMAP-mapped DMA map.
*/
void
tc_bus_dmamap_destroy_sgmap(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
KASSERT(map->dm_mapsize == 0);
_bus_dmamap_destroy(t, map);
}
/*
* Load a TurboChannel SGMAP-mapped DMA map with a linear buffer.
*/
int
tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
{
struct tc_dma_slot_info *tdsi = t->_cookie;
return (tc_sgmap_load(t, map, buf, buflen, p, flags,
&tdsi->tdsi_sgmap));
}
/*
* Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain.
*/
int
tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct mbuf *m;
int flags;
{
struct tc_dma_slot_info *tdsi = t->_cookie;
return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap));
}
/*
* Load a TurboChannel SGMAP-mapped DMA map with a uio.
*/
int
tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct uio *uio;
int flags;
{
struct tc_dma_slot_info *tdsi = t->_cookie;
return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap));
}
/*
* Load a TurboChannel SGMAP-mapped DMA map with raw memory.
*/
int
tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_dma_segment_t *segs;
int nsegs;
bus_size_t size;
int flags;
{
struct tc_dma_slot_info *tdsi = t->_cookie;
return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags,
&tdsi->tdsi_sgmap));
}
/*
* Unload a TurboChannel SGMAP-mapped DMA map.
*/
void
tc_bus_dmamap_unload_sgmap(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
struct tc_dma_slot_info *tdsi = t->_cookie;
/*
* Invalidate any SGMAP page table entries used by this
* mapping.
*/
tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap);
/*
* Do the generic bits of the unload.
*/
_bus_dmamap_unload(t, map);
}
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