NetBSD-5.0.2/sys/arch/vax/uba/uba_dma.c
/* $NetBSD: uba_dma.c,v 1.10 2008/04/28 20:23:39 martin 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.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uba_dma.c,v 1.10 2008/04/28 20:23:39 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#define _VAX_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/sgmap.h>
#include <dev/qbus/ubavar.h>
#include <arch/vax/uba/uba_common.h>
int uba_bus_dmamap_create_sgmap(bus_dma_tag_t, bus_size_t, int,
bus_size_t, bus_size_t, int, bus_dmamap_t *);
void uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t);
int uba_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int);
int uba_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t,
struct mbuf *, int);
int uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t,
struct uio *, int);
int uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t,
bus_dma_segment_t *, int, bus_size_t, int);
void uba_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t);
void uba_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
bus_size_t, int);
void
uba_dma_init(struct uba_vsoftc *sc)
{
bus_dma_tag_t t;
struct pte *pte;
/*
* Initialize the DMA tag used for sgmap-mapped DMA.
*/
t = &sc->uv_dmat;
t->_cookie = sc;
t->_wbase = 0;
t->_wsize = sc->uv_size;
t->_boundary = 0;
t->_sgmap = &sc->uv_sgmap;
t->_dmamap_create = uba_bus_dmamap_create_sgmap;
t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap;
t->_dmamap_load = uba_bus_dmamap_load_sgmap;
t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap;
t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap;
t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap;
t->_dmamap_unload = uba_bus_dmamap_unload_sgmap;
t->_dmamap_sync = uba_bus_dmamap_sync;
t->_dmamem_alloc = _bus_dmamem_alloc;
t->_dmamem_free = _bus_dmamem_free;
t->_dmamem_map = _bus_dmamem_map;
t->_dmamem_unmap = _bus_dmamem_unmap;
t->_dmamem_mmap = _bus_dmamem_mmap;
/*
* Map in Unibus map registers, if not mapped in already.
*/
if (sc->uv_uba) {
pte = sc->uv_uba->uba_map;
} else {
pte = (struct pte *)vax_map_physmem(sc->uv_addr,
vax_btoc(vax_btoc(sc->uv_size) * sizeof(struct pte)));
if (pte == 0)
panic("uba_dma_init");
}
/*
* Initialize the SGMAP.
*/
vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0);
}
/*
* Create a UBA SGMAP-mapped DMA map.
*/
int
uba_bus_dmamap_create_sgmap(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;
if (flags & BUS_DMA_ALLOCNOW) {
error = vax_sgmap_alloc(map, vax_round_page(size),
t->_sgmap, flags);
if (error)
uba_bus_dmamap_destroy_sgmap(t, map);
}
return (error);
}
/*
* Destroy a UBA SGMAP-mapped DMA map.
*/
void
uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t t, bus_dmamap_t map)
{
if (map->_dm_flags & DMAMAP_HAS_SGMAP)
vax_sgmap_free(map, t->_sgmap);
_bus_dmamap_destroy(t, map);
}
/*
* Load a UBA SGMAP-mapped DMA map with a linear buffer.
*/
int
uba_bus_dmamap_load_sgmap(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
bus_size_t buflen, struct proc *p, int flags)
{
int error;
error = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap);
/*
* XXX - Set up BDPs.
*/
return (error);
}
/*
* Load a UBA SGMAP-mapped DMA map with an mbuf chain.
*/
int
uba_bus_dmamap_load_mbuf_sgmap( bus_dma_tag_t t, bus_dmamap_t map,
struct mbuf *m, int flags)
{
int error;
error = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap);
return (error);
}
/*
* Load a UBA SGMAP-mapped DMA map with a uio.
*/
int
uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map,
struct uio *uio, int flags)
{
int error;
error = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap);
return (error);
}
/*
* Load a UBA SGMAP-mapped DMA map with raw memory.
*/
int
uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map,
bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
{
int error;
error = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags,
t->_sgmap);
return (error);
}
/*
* Unload a UBA DMA map.
*/
void
uba_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map)
{
/*
* Invalidate any SGMAP page table entries used by this
* mapping.
*/
vax_sgmap_unload(t, map, t->_sgmap);
/*
* Do the generic bits of the unload.
*/
_bus_dmamap_unload(t, map);
}
/*
* Sync the bus map. This is only needed if BDP's are used.
*/
void
uba_bus_dmamap_sync(bus_dma_tag_t tag, bus_dmamap_t dmam, bus_addr_t offset,
bus_size_t len, int ops)
{
/* Only BDP handling, but not yet. */
}