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VME/IOMMU DMA load must also relocate DVMA addresses to the start of VME space.

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This commit is contained in:
pk 2000-06-27 09:05:23 +00:00
parent 88adda1288
commit 618d3d0fde
1 changed files with 61 additions and 33 deletions
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94
sys/arch/sparc/dev/vme_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: vme_machdep.c,v 1.27 2000/06/26 04:56:05 simonb Exp $ */
/* $NetBSD: vme_machdep.c,v 1.28 2000/06/27 09:05:23 pk Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
@ -95,7 +95,7 @@ static int sparc_vme_error __P((void));
static int sparc_vme_probe __P((void *, vme_addr_t, vme_size_t,
vme_am_t, vme_datasize_t,
vme_am_t, vme_datasize_t,
int (*) __P((void *, bus_space_tag_t, bus_space_handle_t)), void *));
static int sparc_vme_map __P((void *, vme_addr_t, vme_size_t, vme_am_t,
vme_datasize_t, vme_swap_t,
@ -112,7 +112,7 @@ static void sparc_vme_intr_disestablish __P((void *, void *));
static int vmebus_translate __P((struct sparcvme_softc *, vme_am_t,
vme_addr_t, bus_type_t *, bus_addr_t *));
#if defined(SUN4M)
static void sparc_vme4m_barrier __P(( bus_space_tag_t, bus_space_handle_t,
static void sparc_vme_iommu_barrier __P(( bus_space_tag_t, bus_space_handle_t,
bus_size_t, bus_size_t, int));
#endif
@ -134,16 +134,16 @@ static void sparc_vme4_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t,
#endif
#if defined(SUN4M)
static int sparc_vct4m_dmamap_create __P((void *, vme_size_t, vme_am_t,
static int sparc_vct_iommu_dmamap_create __P((void *, vme_size_t, vme_am_t,
vme_datasize_t, vme_swap_t, int, vme_size_t, vme_addr_t,
int, bus_dmamap_t *));
static int sparc_vme4m_dmamap_create __P((bus_dma_tag_t, bus_size_t, int,
bus_size_t, bus_size_t, int, bus_dmamap_t *));
static int sparc_vme_iommu_dmamap_create __P((bus_dma_tag_t, bus_size_t,
int, bus_size_t, bus_size_t, int, bus_dmamap_t *));
static int sparc_vme4m_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int));
static void sparc_vme4m_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
static void sparc_vme4m_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t,
static int sparc_vme_iommu_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t,
void *, bus_size_t, struct proc *, int));
static void sparc_vme_iommu_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
static void sparc_vme_iommu_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t,
bus_addr_t, bus_size_t, int));
#endif
@ -183,11 +183,28 @@ struct rom_range vmebus_translations[] = {
};
/*
* DMA on sun4 VME devices use the last MB of virtual space, which
* is mapped by hardware onto the first MB of VME space.
* The VME bus logic on sun4 machines maps DMA requests in the first MB
* of VME space to the last MB of DVMA space. `vme_dvmamap' is used
* for DVMA space allocations. The DMA addresses returned by
* bus_dmamap_load*() must be relocated by -VME4_DVMA_BASE.
*/
struct extent *vme_dvmamap;
/*
* The VME hardware on the sun4m IOMMU maps the first 8MB of 32-bit
* VME space to the last 8MB of DVMA space and the first 1MB of
* 24-bit VME space to the first 1MB of the last 8MB of DVMA space
* (thus 24-bit VME space overlaps the first 1MB of of 32-bit space).
* The following constants define subregions in the IOMMU DVMA map
* for VME DVMA allocations. The DMA addresses returned by
* bus_dmamap_load*() must be relocated by -VME_IOMMU_DVMA_BASE.
*/
#define VME_IOMMU_DVMA_BASE 0xff800000
#define VME_IOMMU_DVMA_AM24_BASE VME_IOMMU_DVMA_BASE
#define VME_IOMMU_DVMA_AM24_END 0xff900000
#define VME_IOMMU_DVMA_AM32_BASE VME_IOMMU_DVMA_BASE
#define VME_IOMMU_DVMA_AM32_END IOMMU_DVMA_END
struct sparc_bus_space_tag sparc_vme_bus_tag = {
NULL, /* cookie */
NULL, /* parent bus tag */
@ -231,16 +248,16 @@ struct sparc_bus_dma_tag sparc_vme4_dma_tag = {
#endif
#if defined(SUN4M)
struct sparc_bus_dma_tag sparc_vme4m_dma_tag = {
struct sparc_bus_dma_tag sparc_vme_iommu_dma_tag = {
NULL, /* cookie */
sparc_vme4m_dmamap_create,
sparc_vme_iommu_dmamap_create,
_bus_dmamap_destroy,
sparc_vme4m_dmamap_load,
sparc_vme_iommu_dmamap_load,
_bus_dmamap_load_mbuf,
_bus_dmamap_load_uio,
_bus_dmamap_load_raw,
sparc_vme4m_dmamap_unload,
sparc_vme4m_dmamap_sync,
sparc_vme_iommu_dmamap_unload,
sparc_vme_iommu_dmamap_sync,
_bus_dmamem_alloc,
_bus_dmamem_free,
@ -354,16 +371,16 @@ vmeattach_iommu(parent, self, aux)
sc->sc_vmeintr = vmeintr4m;
/*XXX*/ sparc_vme_chipset_tag.cookie = self;
/*XXX*/ sparc_vme_chipset_tag.vct_dmamap_create = sparc_vct4m_dmamap_create;
/*XXX*/ sparc_vme_chipset_tag.vct_dmamap_create = sparc_vct_iommu_dmamap_create;
/*XXX*/ sparc_vme_chipset_tag.vct_dmamap_destroy = sparc_vct_dmamap_destroy;
/*XXX*/ sparc_vme4m_dma_tag._cookie = self;
sparc_vme_bus_tag.sparc_bus_barrier = sparc_vme4m_barrier;
/*XXX*/ sparc_vme_iommu_dma_tag._cookie = self;
sparc_vme_bus_tag.sparc_bus_barrier = sparc_vme_iommu_barrier;
#if 0
vba.vba_bustag = &sparc_vme_bus_tag;
#endif
vba.va_vct = &sparc_vme_chipset_tag;
vba.va_bdt = &sparc_vme4m_dma_tag;
vba.va_bdt = &sparc_vme_iommu_dma_tag;
vba.va_slaveconfig = 0;
node = ia->iom_node;
@ -596,7 +613,7 @@ sparc_vme_mmap_cookie(addr, mod, hp)
#if defined(SUN4M)
void
sparc_vme4m_barrier(t, h, offset, size, flags)
sparc_vme_iommu_barrier(t, h, offset, size, flags)
bus_space_tag_t t;
bus_space_handle_t h;
bus_size_t offset;
@ -981,7 +998,8 @@ sparc_vme4_dmamap_sync(t, map, offset, len, ops)
#if defined(SUN4M)
static int
sparc_vme4m_dmamap_create (t, size, nsegments, maxsegsz, boundary, flags, dmamp)
sparc_vme_iommu_dmamap_create (t, size, nsegments, maxsegsz,
boundary, flags, dmamp)
bus_dma_tag_t t;
bus_size_t size;
int nsegments;
@ -991,13 +1009,13 @@ sparc_vme4m_dmamap_create (t, size, nsegments, maxsegsz, boundary, flags, dmamp)
bus_dmamap_t *dmamp;
{
printf("sparc_vme4m_dmamap_create: please use `vme_dmamap_create'\n");
printf("sparc_vme_dmamap_create: please use `vme_dmamap_create'\n");
return (EINVAL);
}
static int
sparc_vct4m_dmamap_create(cookie, size, am, datasize, swap, nsegments, maxsegsz,
boundary, flags, dmamp)
sparc_vct_iommu_dmamap_create(cookie, size, am, datasize, swap, nsegments,
maxsegsz, boundary, flags, dmamp)
void *cookie;
vme_size_t size;
vme_am_t am;
@ -1030,13 +1048,13 @@ sparc_vct4m_dmamap_create(cookie, size, am, datasize, swap, nsegments, maxsegsz,
case VME_AM_A16:
case VME_AM_A24:
/* 1 MB of DVMA space */
map->_dm_ex_start = 0xff800000;
map->_dm_ex_end = 0xff900000;
map->_dm_ex_start = VME_IOMMU_DVMA_AM24_BASE;
map->_dm_ex_end = VME_IOMMU_DVMA_AM24_END;
break;
case VME_AM_A32:
/* 8 MB of DVMA space */
map->_dm_ex_start = 0xff800000;
map->_dm_ex_end = IOMMU_DVMA_END;
map->_dm_ex_start = VME_IOMMU_DVMA_AM32_BASE;
map->_dm_ex_end = VME_IOMMU_DVMA_AM32_END;
break;
}
@ -1045,7 +1063,7 @@ sparc_vct4m_dmamap_create(cookie, size, am, datasize, swap, nsegments, maxsegsz,
}
int
sparc_vme4m_dmamap_load(t, map, buf, buflen, p, flags)
sparc_vme_iommu_dmamap_load(t, map, buf, buflen, p, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
@ -1070,12 +1088,19 @@ sparc_vme4m_dmamap_load(t, map, buf, buflen, p, flags)
ioctags += VME_IOC_LINESZ/sizeof(*ioctags);
buflen -= VME_IOC_PAGESZ;
}
/*
* Adjust DVMA address to VME view.
* Note: the DVMA base address is the same for all
* VME address spaces.
*/
map->dm_segs[0].ds_addr -= VME_IOMMU_DVMA_BASE;
return (0);
}
void
sparc_vme4m_dmamap_unload(t, map)
sparc_vme_iommu_dmamap_unload(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
@ -1083,6 +1108,9 @@ sparc_vme4m_dmamap_unload(t, map)
volatile u_int32_t *flushregs;
int len;
/* Go from VME to CPU view */
map->dm_segs[0].ds_addr += VME_IOMMU_DVMA_BASE;
/* Flush VME I/O cache */
len = map->dm_segs[0]._ds_sgsize;
flushregs = sc->sc_iocflush + VME_IOC_LINE(map->dm_segs[0].ds_addr);
@ -1102,7 +1130,7 @@ sparc_vme4m_dmamap_unload(t, map)
}
void
sparc_vme4m_dmamap_sync(t, map, offset, len, ops)
sparc_vme_iommu_dmamap_sync(t, map, offset, len, ops)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_addr_t offset;