NetBSD/sys/arch/vax/vsa/vsbus_dma.c

286 lines
7.6 KiB
C

/* $NetBSD: vsbus_dma.c,v 1.8 2000/11/16 19:25:42 matt 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.
*/
#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/sid.h>
#include <machine/sgmap.h>
#include <machine/vsbus.h>
static int vsbus_bus_dmamap_create_sgmap(bus_dma_tag_t, bus_size_t, int,
bus_size_t, bus_size_t, int, bus_dmamap_t *);
static void vsbus_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t);
static int vsbus_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int);
static int vsbus_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t,
struct mbuf *, int);
static int vsbus_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t,
struct uio *, int);
static int vsbus_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t,
bus_dma_segment_t *, int, bus_size_t, int);
static void vsbus_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t);
static void vsbus_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
bus_size_t, int);
void
vsbus_dma_init(sc, ptecnt)
struct vsbus_softc *sc;
unsigned ptecnt;
{
bus_dma_tag_t t;
bus_dma_segment_t segs[1];
struct pte *pte;
int nsegs, error;
unsigned mapsize = ptecnt * sizeof(struct pte);
/*
* Initialize the DMA tag used for sgmap-mapped DMA.
*/
t = &sc->sc_dmatag;
t->_cookie = sc;
t->_wbase = 0;
t->_wsize = ptecnt * VAX_NBPG;
t->_boundary = 0;
t->_sgmap = &sc->sc_sgmap;
t->_dmamap_create = vsbus_bus_dmamap_create_sgmap;
t->_dmamap_destroy = vsbus_bus_dmamap_destroy_sgmap;
t->_dmamap_load = vsbus_bus_dmamap_load_sgmap;
t->_dmamap_load_mbuf = vsbus_bus_dmamap_load_mbuf_sgmap;
t->_dmamap_load_uio = vsbus_bus_dmamap_load_uio_sgmap;
t->_dmamap_load_raw = vsbus_bus_dmamap_load_raw_sgmap;
t->_dmamap_unload = vsbus_bus_dmamap_unload_sgmap;
t->_dmamap_sync = vsbus_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;
if (vax_boardtype == VAX_BTYP_46 || vax_boardtype == VAX_BTYP_48) {
/*
* Allocate and map the VS4000 scatter gather map.
*/
error = bus_dmamem_alloc(t, mapsize, mapsize, mapsize,
segs, 1, &nsegs, BUS_DMA_NOWAIT);
if (error) {
panic("vsbus_dma_init: error allocating memory for "
"hw sgmap: error=%d", error);
}
error = bus_dmamem_map(t, segs, nsegs, mapsize,
(caddr_t *) &pte, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
if (error) {
panic("vsbus_dma_init: error mapping memory for "
"hw sgmap: error=%d", error);
}
memset(pte, 0, mapsize);
*(int *) (sc->sc_vsregs + 8) = segs->ds_addr; /* set MAP BASE 0x2008008 */
} else {
pte = (struct pte *) vax_map_physmem(KA49_SCSIMAP, mapsize / VAX_NBPG);
for (nsegs = ptecnt; nsegs > 0; ) {
((u_int32_t *) pte)[--nsegs] = 0;
}
segs->ds_addr = KA49_SCSIMAP;
}
printf("%s: %uK entry DMA SGMAP at PA 0x%lx (VA %p)\n",
sc->sc_dev.dv_xname, ptecnt / 1024, segs->ds_addr, pte);
/*
* Initialize the SGMAP.
*/
vax_sgmap_init(t, &sc->sc_sgmap, "vsbus_sgmap", t->_wbase, t->_wsize, pte, 0);
}
/*
* Create a VSBUS SGMAP-mapped DMA map.
*/
int
vsbus_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;
if (flags & BUS_DMA_ALLOCNOW) {
error = vax_sgmap_alloc(map, vax_round_page(size),
t->_sgmap, flags);
if (error)
vsbus_bus_dmamap_destroy_sgmap(t, map);
}
return (error);
}
/*
* Destroy a VSBUS SGMAP-mapped DMA map.
*/
static void
vsbus_bus_dmamap_destroy_sgmap(t, map)
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 VSBUS SGMAP-mapped DMA map with a linear buffer.
*/
static int
vsbus_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;
{
return vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap);
}
/*
* Load a VSBUS SGMAP-mapped DMA map with an mbuf chain.
*/
static int
vsbus_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct mbuf *m;
int flags;
{
return vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap);
}
/*
* Load a VSBUS SGMAP-mapped DMA map with a uio.
*/
static int
vsbus_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct uio *uio;
int flags;
{
return vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap);
}
/*
* Load a VSBUS SGMAP-mapped DMA map with raw memory.
*/
static int
vsbus_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;
{
return vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap);
}
/*
* Unload a VSBUS DMA map.
*/
static void
vsbus_bus_dmamap_unload_sgmap(t, map)
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.
*/
static void
vsbus_bus_dmamap_sync(tag, dmam, offset, len, ops)
bus_dma_tag_t tag;
bus_dmamap_t dmam;
bus_addr_t offset;
bus_size_t len;
int ops;
{
/* not needed */
}