NetBSD/sys/arch/arc/jazz/bus_dma_jazz.c

231 lines
6.1 KiB
C

/* $NetBSD: bus_dma_jazz.c,v 1.4 2001/11/14 18:15:15 thorpej Exp $ */
/*-
* Copyright (C) 2000 Shuichiro URATA. All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/mbuf.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>
#define _ARC_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <arc/jazz/jazzdmatlbreg.h>
#include <arc/jazz/jazzdmatlbvar.h>
static int jazz_bus_dmamap_alloc_sgmap __P((bus_dma_tag_t,
bus_dma_segment_t *, int, bus_size_t, struct proc *, int));
static void jazz_bus_dmamap_free_sgmap __P((bus_dma_tag_t,
bus_dma_segment_t *, int));
int jazz_bus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int));
int jazz_bus_dmamap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t,
struct mbuf *, int));
int jazz_bus_dmamap_load_uio __P((bus_dma_tag_t, bus_dmamap_t,
struct uio *, int));
int jazz_bus_dmamap_load_raw __P((bus_dma_tag_t, bus_dmamap_t,
bus_dma_segment_t *, int, bus_size_t, int));
void jazz_bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
void jazz_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t,
bus_addr_t, bus_size_t, int));
void
jazz_bus_dma_tag_init(t)
bus_dma_tag_t t;
{
_bus_dma_tag_init(t);
t->_dmamap_load = jazz_bus_dmamap_load;
t->_dmamap_load_mbuf = jazz_bus_dmamap_load_mbuf;
t->_dmamap_load_uio = jazz_bus_dmamap_load_uio;
t->_dmamap_load_raw = jazz_bus_dmamap_load_raw;
t->_dmamap_unload = jazz_bus_dmamap_unload;
t->_dmamap_sync = jazz_bus_dmamap_sync;
t->_dmamem_alloc = _bus_dmamem_alloc;
t->_dmamem_free = _bus_dmamem_free;
}
static int
jazz_bus_dmamap_alloc_sgmap(t, segs, nsegs, boundary, p, flags)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
bus_size_t boundary;
struct proc *p;
int flags;
{
jazz_dma_pte_t *dmapte;
bus_addr_t addr;
bus_size_t off;
int i, npte;
for (i = 0; i < nsegs; i++) {
off = jazz_dma_page_offs(segs[i]._ds_paddr);
npte = jazz_dma_page_round(segs[i].ds_len + off) /
JAZZ_DMA_PAGE_SIZE;
dmapte = jazz_dmatlb_alloc(npte, boundary, flags, &addr);
if (dmapte == NULL)
return (ENOMEM);
segs[i].ds_addr = addr + off;
jazz_dmatlb_map_pa(segs[i]._ds_paddr, segs[i].ds_len, dmapte);
}
return (0);
}
static void
jazz_bus_dmamap_free_sgmap(t, segs, nsegs)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
{
int i, npte;
bus_addr_t addr;
for (i = 0; i < nsegs; i++) {
addr = (segs[i].ds_addr - t->dma_offset) & JAZZ_DMA_PAGE_NUM;
npte = jazz_dma_page_round(segs[i].ds_len +
jazz_dma_page_offs(segs[i].ds_addr)) / JAZZ_DMA_PAGE_SIZE;
jazz_dmatlb_free(addr, npte);
}
}
/*
* function for loading a direct-mapped DMA map with a linear buffer.
*/
int
jazz_bus_dmamap_load(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;
{
int error = _bus_dmamap_load(t, map, buf, buflen, p, flags);
if (error == 0) {
error = jazz_bus_dmamap_alloc_sgmap(t, map->dm_segs,
map->dm_nsegs, map->_dm_boundary, p, flags);
}
return (error);
}
/*
* Like jazz_bus_dmamap_load(), but for mbufs.
*/
int
jazz_bus_dmamap_load_mbuf(t, map, m0, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct mbuf *m0;
int flags;
{
int error = _bus_dmamap_load_mbuf(t, map, m0, flags);
if (error == 0) {
error = jazz_bus_dmamap_alloc_sgmap(t, map->dm_segs,
map->dm_nsegs, map->_dm_boundary, NULL, flags);
}
return (error);
}
/*
* Like jazz_bus_dmamap_load(), but for uios.
*/
int
jazz_bus_dmamap_load_uio(t, map, uio, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct uio *uio;
int flags;
{
int error = jazz_bus_dmamap_load_uio(t, map, uio, flags);
if (error == 0) {
error = jazz_bus_dmamap_alloc_sgmap(t, map->dm_segs,
map->dm_nsegs, map->_dm_boundary,
uio->uio_segflg == UIO_USERSPACE ? uio->uio_procp : NULL,
flags);
}
return (error);
}
/*
* Like _bus_dmamap_load(), but for raw memory.
*/
int
jazz_bus_dmamap_load_raw(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;
{
int error = _bus_dmamap_load_raw(t, map, segs, nsegs, size, flags);
if (error == 0) {
error = jazz_bus_dmamap_alloc_sgmap(t, map->dm_segs,
map->dm_nsegs, map->_dm_boundary, NULL, flags);
}
return (error);
}
/*
* unload a DMA map.
*/
void
jazz_bus_dmamap_unload(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
jazz_bus_dmamap_free_sgmap(t, map->dm_segs, map->dm_nsegs);
_bus_dmamap_unload(t, map);
}
/*
* Function for MIPS3 DMA map synchronization.
*/
void
jazz_bus_dmamap_sync(t, map, offset, len, ops)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_addr_t offset;
bus_size_t len;
int ops;
{
/* Flush DMA TLB */
if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0)
jazz_dmatlb_flush();
return (_bus_dmamap_sync(t, map, offset, len, ops));
}