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Handle bus_dma aligment properly.

This commit is contained in:
eeh 2000-07-07 02:50:19 +00:00
parent 7753949047
commit 3f2289a3d7
3 changed files with 57 additions and 29 deletions
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59
sys/arch/sparc64/dev/iommu.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: iommu.c,v 1.20 2000/07/02 14:00:38 mrg Exp $ */
/* $NetBSD: iommu.c,v 1.21 2000/07/07 02:50:21 eeh Exp $ */
/*
* Copyright (c) 1999, 2000 Matthew R. Green
@ -240,7 +240,7 @@ iommu_init(name, is, tsbsize)
(unsigned int)is->is_dvmabase,
(unsigned int)IOTSB_VEND);
is->is_dvmamap = extent_create(name,
is->is_dvmabase, IOTSB_VEND,
is->is_dvmabase, (u_long)IOTSB_VEND,
M_DEVBUF, 0, 0, EX_NOWAIT);
}
@ -255,21 +255,27 @@ iommu_reset(is)
{
/* Need to do 64-bit stores */
bus_space_write_8(is->is_bustag, &is->is_iommu->iommu_tsb, 0, is->is_ptsb);
bus_space_write_8(is->is_bustag,
(bus_space_handle_t)(u_long)&is->is_iommu->iommu_tsb,
0, is->is_ptsb);
/* Enable IOMMU in diagnostic mode */
bus_space_write_8(is->is_bustag, &is->is_iommu->iommu_cr, 0,
is->is_cr|IOMMUCR_DE);
bus_space_write_8(is->is_bustag,
(bus_space_handle_t)(u_long)&is->is_iommu->iommu_cr, 0,
is->is_cr|IOMMUCR_DE);
if (!is->is_sb)
return;
/* Enable diagnostics mode? */
bus_space_write_8(is->is_bustag, &is->is_sb->strbuf_ctl, 0, STRBUF_EN);
bus_space_write_8(is->is_bustag,
(bus_space_handle_t)(u_long)&is->is_sb->strbuf_ctl,
0, STRBUF_EN);
/* No streaming buffers? Disable them */
if (bus_space_read_8(is->is_bustag,
(bus_space_handle_t)(u_long)&is->is_sb->strbuf_ctl, 0) == 0)
(bus_space_handle_t)(u_long)&is->is_sb->strbuf_ctl,
0) == 0)
is->is_sb = 0;
}
@ -295,15 +301,15 @@ iommu_enter(is, va, pa, flags)
/* Is the streamcache flush really needed? */
if (is->is_sb) {
bus_space_write_8(is->is_bustag, &is->is_sb->strbuf_pgflush, 0,
va);
bus_space_write_8(is->is_bustag, (bus_space_handle_t)(u_long)
&is->is_sb->strbuf_pgflush, 0, va);
iommu_strbuf_flush(is);
}
DPRINTF(IDB_DVMA, ("Clearing TSB slot %d for va %p\n",
(int)IOTSBSLOT(va,is->is_tsbsize), va));
is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)] = tte;
bus_space_write_8(is->is_bustag, &is->is_iommu->iommu_flush,
0, va);
bus_space_write_8(is->is_bustag, (bus_space_handle_t)(u_long)
&is->is_iommu->iommu_flush, 0, va);
DPRINTF(IDB_DVMA, ("iommu_enter: va %lx pa %lx TSB[%lx]@%p=%lx\n",
va, (long)pa, IOTSBSLOT(va,is->is_tsbsize),
&is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)],
@ -347,8 +353,8 @@ iommu_remove(is, va, len)
(long)&is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)],
(long)(is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)]),
(u_long)len));
bus_space_write_8(is->is_bustag,
&is->is_sb->strbuf_pgflush, 0, va);
bus_space_write_8(is->is_bustag, (bus_space_handle_t)(u_long)
&is->is_sb->strbuf_pgflush, 0, va);
if (len <= NBPG)
iommu_strbuf_flush(is);
DPRINTF(IDB_DVMA, ("iommu_remove: flushed va %p TSB[%lx]@%p=%lx, %lu bytes left\n",
@ -365,7 +371,8 @@ iommu_remove(is, va, len)
len -= NBPG;
is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)] = 0;
bus_space_write_8(is->is_bustag, &is->is_iommu->iommu_flush, 0, va);
bus_space_write_8(is->is_bustag, (bus_space_handle_t)(u_long)
&is->is_iommu->iommu_flush, 0, va);
va += NBPG;
}
}
@ -405,7 +412,8 @@ iommu_strbuf_flush(is)
is->is_flush = 0;
membar_sync();
bus_space_write_8(is->is_bustag, &is->is_sb->strbuf_flushsync, 0, is->is_flushpa);
bus_space_write_8(is->is_bustag, (bus_space_handle_t)(u_long)
&is->is_sb->strbuf_flushsync, 0, is->is_flushpa);
membar_sync();
microtime(&flushtimeout);
@ -452,7 +460,8 @@ iommu_dvmamap_load(t, is, map, buf, buflen, p, flags)
int err;
bus_size_t sgsize;
paddr_t curaddr;
u_long dvmaddr, align;
u_long dvmaddr;
bus_size_t align, boundary;
vaddr_t vaddr = (vaddr_t)buf;
pmap_t pmap;
@ -478,12 +487,15 @@ iommu_dvmamap_load(t, is, map, buf, buflen, p, flags)
sgsize = round_page(buflen + ((int)vaddr & PGOFSET));
/*
* XXX Need to implement "don't dma across this boundry".
* A boundary presented to bus_dmamem_alloc() takes precedence
* over boundary in the map.
*/
align = max(map->_dm_boundary, NBPG);
if ((boundary = (map->dm_segs[0]._ds_boundary)) == 0)
boundary = map->_dm_boundary;
align = max(map->dm_segs[0]._ds_align, NBPG);
s = splhigh();
err = extent_alloc(is->is_dvmamap, sgsize, align,
map->_dm_boundary, EX_NOWAIT|EX_BOUNDZERO, (u_long *)&dvmaddr);
boundary, EX_NOWAIT|EX_BOUNDZERO, (u_long *)&dvmaddr);
splx(s);
#ifdef DEBUG
@ -598,7 +610,7 @@ iommu_dvmamap_load_raw(t, is, map, segs, nsegs, size, flags)
int err;
bus_size_t sgsize;
paddr_t pa;
u_long boundary, align;
bus_size_t boundary, align;
u_long dvmaddr;
struct pglist *mlist;
int pagesz = PAGE_SIZE;
@ -633,7 +645,7 @@ iommu_dvmamap_load_raw(t, is, map, segs, nsegs, size, flags)
if ((boundary = segs[0]._ds_boundary) == 0)
boundary = map->_dm_boundary;
align = max(map->_dm_boundary, NBPG);
align = max(segs[0]._ds_align, NBPG);
s = splhigh();
err = extent_alloc(is->is_dvmamap, sgsize, align, boundary,
((flags & BUS_DMA_NOWAIT) == 0 ? EX_WAITOK : EX_NOWAIT)|EX_BOUNDZERO,
@ -713,7 +725,8 @@ iommu_dvmamap_sync(t, is, map, offset, len, ops)
("iommu_dvmamap_sync: flushing va %p, %lu "
"bytes left\n", (long)va, (u_long)len));
bus_space_write_8(is->is_bustag,
&is->is_sb->strbuf_pgflush, 0, va);
(bus_space_handle_t)(u_long)
&is->is_sb->strbuf_pgflush, 0, va);
if (len <= NBPG) {
iommu_strbuf_flush(is);
len = 0;
@ -750,7 +763,7 @@ iommu_dvmamem_alloc(t, is, size, alignment, boundary, segs, nsegs, rsegs, flags)
DPRINTF(IDB_DVMA, ("iommu_dvmamem_alloc: sz %qx align %qx bound %qx "
"segp %p flags %d\n", size, alignment, boundary, segs, flags));
return (bus_dmamem_alloc(t->_parent, size, alignment, boundary,
segs, nsegs, rsegs, flags));
segs, nsegs, rsegs, flags|BUS_DMA_DVMA));
}
void

9
sys/arch/sparc64/include/bus.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: bus.h,v 1.19 2000/06/29 14:10:16 pk Exp $ */
/* $NetBSD: bus.h,v 1.20 2000/07/07 02:50:19 eeh Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@ -870,11 +870,15 @@ bus_space_copy_region_8(t, h1, o1, h2, o2, c)
#define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */
#define BUS_DMA_COHERENT 0x04 /* hint: map memory DMA coherent */
#define BUS_DMA_NOWRITE 0x08 /* I suppose the following two should default on */
#define BUS_DMA_NOCACHE 0x10
#define BUS_DMA_BUS1 0x10
#define BUS_DMA_BUS2 0x20
#define BUS_DMA_BUS3 0x40
#define BUS_DMA_BUS4 0x80
#define BUS_DMA_NOCACHE BUS_DMA_BUS1
#define BUS_DMA_DVMA BUS_DMA_BUS2 /* Don't bother with alignment */
/* Forwards needed by prototypes below. */
struct mbuf;
struct uio;
@ -900,6 +904,7 @@ struct sparc_bus_dma_segment {
bus_addr_t ds_addr; /* DVMA address */
bus_size_t ds_len; /* length of transfer */
bus_size_t _ds_boundary; /* don't cross this */
bus_size_t _ds_align; /* align to this */
void *_ds_mlist; /* XXX - dmamap_alloc'ed pages */
};
typedef struct sparc_bus_dma_segment bus_dma_segment_t;

16
sys/arch/sparc64/sparc64/machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.74 2000/06/30 22:58:02 eeh Exp $ */
/* $NetBSD: machdep.c,v 1.75 2000/07/07 02:50:20 eeh Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@ -1044,7 +1044,8 @@ _bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, flags, dmamp)
map->_dm_segcnt = nsegments;
map->_dm_maxsegsz = maxsegsz;
map->_dm_boundary = boundary;
map->_dm_flags = flags & ~(BUS_DMA_WAITOK|BUS_DMA_NOWAIT|BUS_DMA_COHERENT|BUS_DMA_NOWRITE|BUS_DMA_NOCACHE);
map->_dm_flags = flags & ~(BUS_DMA_WAITOK|BUS_DMA_NOWAIT|BUS_DMA_COHERENT|
BUS_DMA_NOWRITE|BUS_DMA_NOCACHE);
map->dm_mapsize = 0; /* no valid mappings */
map->dm_nsegs = 0;
@ -1261,6 +1262,16 @@ _bus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags)
(flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL)
return (ENOMEM);
/*
* If the bus uses DVMA then ignore boundary and alignment.
*/
segs[0]._ds_boundary = boundary;
segs[0]._ds_align = alignment;
if (flags & BUS_DMA_DVMA) {
boundary = 0;
alignment = 0;
}
/*
* Allocate pages from the VM system.
*/
@ -1276,7 +1287,6 @@ _bus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags)
*/
segs[0].ds_addr = NULL; /* UPA does not map things */
segs[0].ds_len = size;
segs[0]._ds_boundary = boundary;
*rsegs = 1;
/*