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Add bus_dma support.

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This commit is contained in:
tsubai 1998-07-17 18:38:10 +00:00
parent fb93315ffc
commit 5f7fef3c79
4 changed files with 612 additions and 16 deletions
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1
sys/arch/macppc/conf/files.macppc
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@ -8,6 +8,7 @@ maxusers 2 8 64
include "arch/powerpc/conf/files.ofw"
file arch/macppc/macppc/autoconf.c
file arch/macppc/macppc/bus_dma.c
file arch/macppc/macppc/clock.c
file arch/macppc/macppc/conf.c
file arch/macppc/macppc/disksubr.c disk

38
sys/arch/macppc/include/bus.h
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@ -1,4 +1,4 @@
/* $NetBSD: bus.h,v 1.1 1998/05/15 10:15:52 tsubai Exp $ */
/* $NetBSD: bus.h,v 1.2 1998/07/17 18:38:10 tsubai Exp $ */
/* $OpenBSD: bus.h,v 1.1 1997/10/13 10:53:42 pefo Exp $ */
/*
@ -64,15 +64,15 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _POWERMAC_BUS_H_
#define _POWERMAC_BUS_H_
#ifndef _MACPPC_BUS_H_
#define _MACPPC_BUS_H_
#include <machine/pio.h>
/*
* Values for the PowerMac bus space tag, not to be used directly by MI code.
*/
/* #define POWERMAC_BUS_REVERSE 1 */
/* #define MACPPC_BUS_REVERSE 1 */
/*
* Bus access types.
@ -684,7 +684,7 @@ bus_space_set_region_stream_4(tag, bsh, offset, val, count)
* bus_space_handle_t bsh, bus_size_t offset,
* bus_size_t len, int flags));
*
* Note: the powermac does not currently require barriers, but we must
* Note: the macppc does not currently require barriers, but we must
* provide the flags to MI code.
*/
#define bus_space_barrier(t, h, o, l, f) \
@ -720,8 +720,8 @@ struct uio;
#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
typedef struct powermac_bus_dma_tag *bus_dma_tag_t;
typedef struct powermac_bus_dmamap *bus_dmamap_t;
typedef struct macppc_bus_dma_tag *bus_dma_tag_t;
typedef struct macppc_bus_dmamap *bus_dmamap_t;
/*
* bus_dma_segment_t
@ -729,11 +729,11 @@ typedef struct powermac_bus_dmamap *bus_dmamap_t;
* Describes a single contiguous DMA transaction. Values
* are suitable for programming into DMA registers.
*/
struct powermac_bus_dma_segment {
struct macppc_bus_dma_segment {
bus_addr_t ds_addr; /* DMA address */
bus_size_t ds_len; /* length of transfer */
};
typedef struct powermac_bus_dma_segment bus_dma_segment_t;
typedef struct macppc_bus_dma_segment bus_dma_segment_t;
/*
* bus_dma_tag_t
@ -742,8 +742,16 @@ typedef struct powermac_bus_dma_segment bus_dma_segment_t;
* DMA for a given bus.
*/
struct powermac_bus_dma_tag {
void *_cookie; /* cookie used in the guts */
struct macppc_bus_dma_tag {
/*
* The `bounce threshold' is checked while we are loading
* the DMA map. If the physical address of the segment
* exceeds the threshold, an error will be returned. The
* caller can then take whatever action is necessary to
* bounce the transfer. If this value is 0, it will be
* ignored.
*/
bus_addr_t _bounce_thresh;
/*
* DMA mapping methods.
@ -811,7 +819,7 @@ struct powermac_bus_dma_tag {
*
* Describes a DMA mapping.
*/
struct powermac_bus_dmamap {
struct macppc_bus_dmamap {
/*
* PRIVATE MEMBERS: not for use my machine-independent code.
*/
@ -831,7 +839,7 @@ struct powermac_bus_dmamap {
bus_dma_segment_t dm_segs[1]; /* segments; variable length */
};
#ifdef _POWERMAC_BUS_DMA_PRIVATE
#ifdef _MACPPC_BUS_DMA_PRIVATE
int _bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t,
bus_size_t, int, bus_dmamap_t *));
void _bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t));
@ -863,6 +871,6 @@ int _bus_dmamem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size,
bus_size_t alignment, bus_size_t boundary,
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
vm_offset_t low, vm_offset_t high));
#endif /* _POWERMAC_BUS_DMA_PRIVATE */
#endif /* _MACPPC_BUS_DMA_PRIVATE */
#endif /* _POWERMAC_BUS_H_ */
#endif /* _MACPPC_BUS_H_ */

585
sys/arch/macppc/macppc/bus_dma.c Normal file
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@ -0,0 +1,585 @@
/* $NetBSD: bus_dma.c,v 1.1 1998/07/17 18:38:10 tsubai 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 "opt_uvm.h"
#include "opt_pmap_new.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/mbuf.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#if defined(UVM)
#include <uvm/uvm_extern.h>
#endif
#define _MACPPC_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/intr.h>
int _bus_dmamap_load_buffer __P((bus_dmamap_t, void *, bus_size_t,
struct proc *, int, bus_addr_t, vm_offset_t *, int *, int));
/*
* Common function for DMA map creation. May be called by bus-specific
* DMA map creation functions.
*/
int
_bus_dmamap_create(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;
{
struct macppc_bus_dmamap *map;
void *mapstore;
size_t mapsize;
/*
* Allocate and initialize the DMA map. The end of the map
* is a variable-sized array of segments, so we allocate enough
* room for them in one shot.
*
* Note we don't preserve the WAITOK or NOWAIT flags. Preservation
* of ALLOCNOW notifies others that we've reserved these resources,
* and they are not to be freed.
*
* The bus_dmamap_t includes one bus_dma_segment_t, hence
* the (nsegments - 1).
*/
mapsize = sizeof(struct macppc_bus_dmamap) +
(sizeof(bus_dma_segment_t) * (nsegments - 1));
if ((mapstore = malloc(mapsize, M_DMAMAP,
(flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL)
return (ENOMEM);
bzero(mapstore, mapsize);
map = (struct macppc_bus_dmamap *)mapstore;
map->_dm_size = size;
map->_dm_segcnt = nsegments;
map->_dm_maxsegsz = maxsegsz;
map->_dm_boundary = boundary;
map->_dm_flags = flags & ~(BUS_DMA_WAITOK|BUS_DMA_NOWAIT);
map->dm_mapsize = 0; /* no valid mappings */
map->dm_nsegs = 0;
*dmamp = map;
return (0);
}
/*
* Common function for DMA map destruction. May be called by bus-specific
* DMA map destruction functions.
*/
void
_bus_dmamap_destroy(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
free(map, M_DMAMAP);
}
/*
* Utility function to load a linear buffer. lastaddrp holds state
* between invocations (for multiple-buffer loads). segp contains
* the starting segment on entrance, and the ending segment on exit.
* first indicates if this is the first invocation of this function.
*/
int
_bus_dmamap_load_buffer(map, buf, buflen, p, flags, bounce_thresh, lastaddrp,
segp, first)
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
bus_addr_t bounce_thresh;
vm_offset_t *lastaddrp;
int *segp;
int first;
{
bus_size_t sgsize;
bus_addr_t curaddr, lastaddr, baddr, bmask;
vm_offset_t vaddr = (vm_offset_t)buf;
int seg;
lastaddr = *lastaddrp;
bmask = ~(map->_dm_boundary - 1);
for (seg = *segp; buflen > 0 ; ) {
/*
* Get the physical address for this segment.
*/
if (p != NULL)
curaddr = pmap_extract(p->p_vmspace->vm_map.pmap,
vaddr);
else
curaddr = vtophys(vaddr);
/*
* If we're beyond the bounce threshold, notify
* the caller.
*/
if (bounce_thresh != 0 && curaddr >= bounce_thresh)
return (EINVAL);
/*
* Compute the segment size, and adjust counts.
*/
sgsize = NBPG - ((u_long)vaddr & PGOFSET);
if (buflen < sgsize)
sgsize = buflen;
/*
* Make sure we don't cross any boundaries.
*/
if (map->_dm_boundary > 0) {
baddr = (curaddr + map->_dm_boundary) & bmask;
if (sgsize > (baddr - curaddr))
sgsize = (baddr - curaddr);
}
/*
* Insert chunk into a segment, coalescing with
* the previous segment if possible.
*/
if (first) {
map->dm_segs[seg].ds_addr = curaddr;
map->dm_segs[seg].ds_len = sgsize;
first = 0;
} else {
if (curaddr == lastaddr &&
(map->dm_segs[seg].ds_len + sgsize) <=
map->_dm_maxsegsz &&
(map->_dm_boundary == 0 ||
(map->dm_segs[seg].ds_addr & bmask) ==
(curaddr & bmask)))
map->dm_segs[seg].ds_len += sgsize;
else {
if (++seg >= map->_dm_segcnt)
break;
map->dm_segs[seg].ds_addr = curaddr;
map->dm_segs[seg].ds_len = sgsize;
}
}
lastaddr = curaddr + sgsize;
vaddr += sgsize;
buflen -= sgsize;
}
*segp = seg;
*lastaddrp = lastaddr;
/*
* Did we fit?
*/
if (buflen != 0)
return (EFBIG); /* XXX better return value here? */
return (0);
}
/*
* Common function for loading a DMA map with a linear buffer. May
* be called by bus-specific DMA map load functions.
*/
int
_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;
{
vm_offset_t lastaddr;
int seg, error;
/*
* Make sure that on error condition we return "no valid mappings".
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
if (buflen > map->_dm_size)
return (EINVAL);
seg = 0;
error = _bus_dmamap_load_buffer(map, buf, buflen, p, flags,
t->_bounce_thresh, &lastaddr, &seg, 1);
if (error == 0) {
map->dm_mapsize = buflen;
map->dm_nsegs = seg + 1;
}
return (error);
}
/*
* Like _bus_dmamap_load(), but for mbufs.
*/
int
_bus_dmamap_load_mbuf(t, map, m0, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct mbuf *m0;
int flags;
{
vm_offset_t lastaddr;
int seg, error, first;
struct mbuf *m;
/*
* Make sure that on error condition we return "no valid mappings."
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
#ifdef DIAGNOSTIC
if ((m0->m_flags & M_PKTHDR) == 0)
panic("_bus_dmamap_load_mbuf: no packet header");
#endif
if (m0->m_pkthdr.len > map->_dm_size)
return (EINVAL);
first = 1;
seg = 0;
error = 0;
for (m = m0; m != NULL && error == 0; m = m->m_next) {
error = _bus_dmamap_load_buffer(map, m->m_data, m->m_len,
NULL, flags, t->_bounce_thresh, &lastaddr, &seg, first);
first = 0;
}
if (error == 0) {
map->dm_mapsize = m0->m_pkthdr.len;
map->dm_nsegs = seg + 1;
}
return (error);
}
/*
* Like _bus_dmamap_load(), but for uios.
*/
int
_bus_dmamap_load_uio(t, map, uio, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct uio *uio;
int flags;
{
panic("_bus_dmamap_load_uio: not implemented");
}
/*
* Like _bus_dmamap_load(), but for raw memory.
*/
int
_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;
{
panic("_bus_dmamap_load_raw: not implemented");
}
/*
* Common function for unloading a DMA map. May be called by
* chipset-specific DMA map unload functions.
*/
void
_bus_dmamap_unload(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
/*
* No resources to free; just mark the mappings as
* invalid.
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
}
/*
* Common function for DMA map synchronization. May be called
* by chipset-specific DMA map synchronization functions.
*/
void
_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;
{
/* Nothing to do here. */
}
/*
* Common function for DMA-safe memory allocation. May be called
* by bus-specific DMA memory allocation functions.
*/
int
_bus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags)
bus_dma_tag_t t;
bus_size_t size, alignment, boundary;
bus_dma_segment_t *segs;
int nsegs;
int *rsegs;
int flags;
{
vm_offset_t avail_start, avail_end;
vm_offset_t curaddr, lastaddr, high;
vm_page_t m;
struct pglist mlist;
int curseg, error;
avail_start = vm_physmem[0].avail_start << PGSHIFT;
avail_end = vm_physmem[vm_nphysseg - 1].avail_end << PGSHIFT;
/* Always round the size. */
size = round_page(size);
high = avail_end - PAGE_SIZE;
/*
* Allocate pages from the VM system.
*/
TAILQ_INIT(&mlist);
#if defined(UVM)
error = uvm_pglistalloc(size, avail_start, high, alignment, boundary,
&mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0);
#else
error = vm_page_alloc_memory(size, avail_start, high,
alignment, boundary, &mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0);
#endif
if (error)
return (error);
/*
* Compute the location, size, and number of segments actually
* returned by the VM code.
*/
m = mlist.tqh_first;
curseg = 0;
lastaddr = segs[curseg].ds_addr = VM_PAGE_TO_PHYS(m);
segs[curseg].ds_len = PAGE_SIZE;
m = m->pageq.tqe_next;
for (; m != NULL; m = m->pageq.tqe_next) {
curaddr = VM_PAGE_TO_PHYS(m);
#ifdef DIAGNOSTIC
if (curaddr < avail_start || curaddr >= high) {
printf("vm_page_alloc_memory returned non-sensical"
" address 0x%lx\n", curaddr);
panic("_bus_dmamem_alloc");
}
#endif
if (curaddr == (lastaddr + PAGE_SIZE))
segs[curseg].ds_len += PAGE_SIZE;
else {
curseg++;
segs[curseg].ds_addr = curaddr;
segs[curseg].ds_len = PAGE_SIZE;
}
lastaddr = curaddr;
}
*rsegs = curseg + 1;
return (0);
}
/*
* Common function for freeing DMA-safe memory. May be called by
* bus-specific DMA memory free functions.
*/
void
_bus_dmamem_free(t, segs, nsegs)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
{
vm_page_t m;
bus_addr_t addr;
struct pglist mlist;
int curseg;
/*
* Build a list of pages to free back to the VM system.
*/
TAILQ_INIT(&mlist);
for (curseg = 0; curseg < nsegs; curseg++) {
for (addr = segs[curseg].ds_addr;
addr < (segs[curseg].ds_addr + segs[curseg].ds_len);
addr += PAGE_SIZE) {
m = PHYS_TO_VM_PAGE(addr);
TAILQ_INSERT_TAIL(&mlist, m, pageq);
}
}
#if defined(UVM)
uvm_pglistfree(&mlist);
#else
vm_page_free_memory(&mlist);
#endif
}
/*
* Common function for mapping DMA-safe memory. May be called by
* bus-specific DMA memory map functions.
*/
int
_bus_dmamem_map(t, segs, nsegs, size, kvap, flags)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
size_t size;
caddr_t *kvap;
int flags;
{
vm_offset_t va;
bus_addr_t addr;
int curseg;
size = round_page(size);
#if defined(UVM)
va = uvm_km_valloc(kernel_map, size);
#else
va = kmem_alloc_pageable(kernel_map, size);
#endif
if (va == 0)
return (ENOMEM);
*kvap = (caddr_t)va;
for (curseg = 0; curseg < nsegs; curseg++) {
for (addr = segs[curseg].ds_addr;
addr < (segs[curseg].ds_addr + segs[curseg].ds_len);
addr += NBPG, va += NBPG, size -= NBPG) {
if (size == 0)
panic("_bus_dmamem_map: size botch");
#if defined(PMAP_NEW)
pmap_kenter_pa(va, addr, VM_PROT_READ | VM_PROT_WRITE);
#else
pmap_enter(pmap_kernel(), va, addr,
VM_PROT_READ | VM_PROT_WRITE, TRUE);
#endif
}
}
return (0);
}
/*
* Common function for unmapping DMA-safe memory. May be called by
* bus-specific DMA memory unmapping functions.
*/
void
_bus_dmamem_unmap(t, kva, size)
bus_dma_tag_t t;
caddr_t kva;
size_t size;
{
#ifdef DIAGNOSTIC
if ((u_long)kva & PGOFSET)
panic("_bus_dmamem_unmap");
#endif
size = round_page(size);
#if defined(UVM)
uvm_km_free(kernel_map, (vm_offset_t)kva, size);
#else
kmem_free(kernel_map, (vm_offset_t)kva, size);
#endif
}
/*
* Common functin for mmap(2)'ing DMA-safe memory. May be called by
* bus-specific DMA mmap(2)'ing functions.
*/
int
_bus_dmamem_mmap(t, segs, nsegs, off, prot, flags)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs, off, prot, flags;
{
int i;
for (i = 0; i < nsegs; i++) {
#ifdef DIAGNOSTIC
if (off & PGOFSET)
panic("_bus_dmamem_mmap: offset unaligned");
if (segs[i].ds_addr & PGOFSET)
panic("_bus_dmamem_mmap: segment unaligned");
if (segs[i].ds_len & PGOFSET)
panic("_bus_dmamem_mmap: segment size not multiple"
" of page size");
#endif
if (off >= segs[i].ds_len) {
off -= segs[i].ds_len;
continue;
}
return (segs[i].ds_addr + off);
}
/* Page not found. */
return (-1);
}

4
sys/arch/macppc/pci/pci_machdep.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: pci_machdep.h,v 1.2 1998/07/13 19:27:13 tsubai Exp $ */
/* $NetBSD: pci_machdep.h,v 1.3 1998/07/17 18:38:11 tsubai Exp $ */
/*
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
@ -62,6 +62,8 @@ struct pci_bridge pci_bridges[2];
#define PCI_CHIPSET_BANDIT 0x00
#define PCI_CHIPSET_MPC106 0x10
extern struct macppc_bus_dma_tag pci_bus_dma_tag;
/*
* Functions provided to machine-independent PCI code.
*/