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[src/trunk]: src/sys/arch/vax sgmap files, copied from the Alpha port and mod...
details: https://anonhg.NetBSD.org/src/rev/9f9881c5a48f
branches: trunk
changeset: 473522:9f9881c5a48f
user: ragge <ragge%NetBSD.org@localhost>
date: Sun Jun 06 18:58:50 1999 +0000
description:
sgmap files, copied from the Alpha port and modified for vax.
diffstat:
sys/arch/vax/include/sgmap.h | 86 +++++++++++
sys/arch/vax/vax/sgmap.c | 330 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 416 insertions(+), 0 deletions(-)
diffs (truncated from 424 to 300 lines):
diff -r 436e4ad82f8f -r 9f9881c5a48f sys/arch/vax/include/sgmap.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/vax/include/sgmap.h Sun Jun 06 18:58:50 1999 +0000
@@ -0,0 +1,86 @@
+/* $NetBSD: sgmap.h,v 1.1 1999/06/06 18:58:50 ragge 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.
+ */
+
+#ifndef _VAX_COMMON_SGMAPVAR_H
+#define _VAX_COMMON_SGMAPVAR_H
+
+#include <sys/extent.h>
+#include <machine/bus.h>
+#include <machine/pte.h>
+
+/*
+ * A VAX SGMAP's state information. Nothing in the sgmap requires
+ * locking[*], with the exception of the extent map. Locking of the
+ * extent map is handled within the extent manager itself.
+ *
+ * [*] While the page table is a `global' resource, access to it is
+ * controlled by the extent map; once a region has been allocated from
+ * the map, that region is effectively `locked'.
+ */
+struct vax_sgmap {
+ struct extent *aps_ex; /* extent map to manage sgva space */
+ struct pte *aps_pt; /* page table */
+ bus_addr_t aps_sgvabase; /* base of the sgva space */
+ bus_size_t aps_sgvasize; /* size of the sgva space */
+ bus_addr_t aps_pa; /* Address in region */
+};
+
+void vax_sgmap_init __P((bus_dma_tag_t, struct vax_sgmap *,
+ const char *, bus_addr_t, bus_size_t, struct pte *, bus_size_t));
+
+int vax_sgmap_alloc __P((bus_dmamap_t, bus_size_t,
+ struct vax_sgmap *, int));
+void vax_sgmap_free __P((bus_dmamap_t, struct vax_sgmap *));
+
+int vax_sgmap_load __P((bus_dma_tag_t, bus_dmamap_t, void *,
+ bus_size_t, struct proc *, int, struct vax_sgmap *));
+
+int vax_sgmap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t,
+ struct mbuf *, int, struct vax_sgmap *));
+
+int vax_sgmap_load_uio __P((bus_dma_tag_t, bus_dmamap_t,
+ struct uio *, int, struct vax_sgmap *));
+
+int vax_sgmap_load_raw __P((bus_dma_tag_t, bus_dmamap_t,
+ bus_dma_segment_t *, int, bus_size_t, int, struct vax_sgmap *));
+
+void vax_sgmap_unload __P(( bus_dma_tag_t, bus_dmamap_t,
+ struct vax_sgmap *));
+
+#endif /* _ALPHA_COMMON_SGMAPVAR_H */
diff -r 436e4ad82f8f -r 9f9881c5a48f sys/arch/vax/vax/sgmap.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/vax/vax/sgmap.c Sun Jun 06 18:58:50 1999 +0000
@@ -0,0 +1,330 @@
+/* $NetBSD: sgmap.c,v 1.1 1999/06/06 18:58:50 ragge 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/proc.h>
+#include <sys/malloc.h>
+
+#include <vm/vm.h>
+
+#include <machine/bus.h>
+#include <machine/sgmap.h>
+
+void
+vax_sgmap_init(t, sgmap, name, sgvabase, sgvasize, ptva, minptalign)
+ bus_dma_tag_t t;
+ struct vax_sgmap *sgmap;
+ const char *name;
+ bus_addr_t sgvabase;
+ bus_size_t sgvasize;
+ struct pte *ptva;
+ bus_size_t minptalign;
+{
+ bus_dma_segment_t seg;
+ size_t ptsize;
+ int rseg;
+
+ if (sgvasize & PGOFSET) {
+ printf("size botch for sgmap `%s'\n", name);
+ goto die;
+ }
+
+ sgmap->aps_sgvabase = sgvabase;
+ sgmap->aps_sgvasize = sgvasize;
+
+ if (ptva != NULL) {
+ /*
+ * We already have a page table; this may be a system
+ * where the page table resides in bridge-resident SRAM.
+ */
+ sgmap->aps_pt = ptva;
+ } else {
+ /*
+ * Compute the page table size and allocate it. At minimum,
+ * this must be aligned to the page table size. However,
+ * some platforms have more strict alignment reqirements.
+ */
+ ptsize = (sgvasize / VAX_NBPG) * sizeof(struct pte);
+ if (minptalign != 0) {
+ if (minptalign < ptsize)
+ minptalign = ptsize;
+ } else
+ minptalign = ptsize;
+ if (bus_dmamem_alloc(t, ptsize, minptalign, 0, &seg, 1, &rseg,
+ BUS_DMA_NOWAIT)) {
+ panic("unable to allocate page table for sgmap `%s'\n",
+ name);
+ goto die;
+ }
+ sgmap->aps_pt = (struct pte *)(seg.ds_addr | KERNBASE);
+ }
+
+ /*
+ * Create the extent map used to manage the virtual address
+ * space.
+ */
+ sgmap->aps_ex = extent_create((char *)name, sgvabase, sgvasize - 1,
+ M_DMAMAP, NULL, 0, EX_NOWAIT|EX_NOCOALESCE);
+ if (sgmap->aps_ex == NULL) {
+ printf("unable to create extent map for sgmap `%s'\n", name);
+ goto die;
+ }
+
+ return;
+ die:
+ panic("vax_sgmap_init");
+}
+
+int
+vax_sgmap_alloc(map, origlen, sgmap, flags)
+ bus_dmamap_t map;
+ bus_size_t origlen;
+ struct vax_sgmap *sgmap;
+ int flags;
+{
+ int error;
+ bus_size_t len = origlen;
+
+#ifdef DIAGNOSTIC
+ if (map->_dm_flags & DMAMAP_HAS_SGMAP)
+ panic("vax_sgmap_alloc: already have sgva space");
+#endif
+
+ map->_dm_sgvalen = round_page(len);
+
+#if 0
+ printf("len %x -> %x, _dm_sgvalen %x _dm_boundary %x boundary %x -> ",
+ origlen, len, map->_dm_sgvalen, map->_dm_boundary, boundary);
+#endif
+
+ error = extent_alloc(sgmap->aps_ex, map->_dm_sgvalen, VAX_NBPG,
+ 0, (flags & BUS_DMA_NOWAIT) ? EX_NOWAIT : EX_WAITOK,
+ &map->_dm_sgva);
+#if 0
+ printf("error %d _dm_sgva %x\n", error, map->_dm_sgva);
+#endif
+
+ if (error == 0)
+ map->_dm_flags |= DMAMAP_HAS_SGMAP;
+ else
+ map->_dm_flags &= ~DMAMAP_HAS_SGMAP;
+
+ return (error);
+}
+
+void
+vax_sgmap_free(map, sgmap)
+ bus_dmamap_t map;
+ struct vax_sgmap *sgmap;
+{
+
+#ifdef DIAGNOSTIC
+ if ((map->_dm_flags & DMAMAP_HAS_SGMAP) == 0)
+ panic("vax_sgmap_free: no sgva space to free");
+#endif
+
+ if (extent_free(sgmap->aps_ex, map->_dm_sgva, map->_dm_sgvalen,
+ EX_NOWAIT))
+ panic("vax_sgmap_free");
+
+ map->_dm_flags &= ~DMAMAP_HAS_SGMAP;
+}
+
+int
+vax_sgmap_load(t, map, buf, buflen, p, flags, sgmap)
+ bus_dma_tag_t t;
+ bus_dmamap_t map;
+ void *buf;
+ bus_size_t buflen;
+ struct proc *p;
+ int flags;
+ struct vax_sgmap *sgmap;
+{
+ vaddr_t endva, va = (vaddr_t)buf;
+ paddr_t pa;
+ bus_addr_t dmaoffset;
+ bus_size_t dmalen;
+ long *pte, *page_table = (long *)sgmap->aps_pt;
+ int pteidx, 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);
+
+ /*
+ * Remember the offset into the first page and the total
+ * transfer length.
+ */
+ dmaoffset = ((u_long)buf) & VAX_PGOFSET;
+ dmalen = buflen;
+
+
+ /*
+ * Allocate the necessary virtual address space for the
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