sgmap files, copied from the Alpha port and modified for vax.
This commit is contained in:
ragge
parent
a775803f91
commit
64572c459a
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@ -0,0 +1,86 @@
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/* $NetBSD: sgmap.h,v 1.1 1999/06/06 18:58:50 ragge Exp $ */
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/*-
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* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _VAX_COMMON_SGMAPVAR_H
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#define _VAX_COMMON_SGMAPVAR_H
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#include <sys/extent.h>
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#include <machine/bus.h>
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#include <machine/pte.h>
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/*
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* A VAX SGMAP's state information. Nothing in the sgmap requires
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* locking[*], with the exception of the extent map. Locking of the
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* extent map is handled within the extent manager itself.
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*
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* [*] While the page table is a `global' resource, access to it is
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* controlled by the extent map; once a region has been allocated from
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* the map, that region is effectively `locked'.
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*/
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struct vax_sgmap {
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struct extent *aps_ex; /* extent map to manage sgva space */
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struct pte *aps_pt; /* page table */
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bus_addr_t aps_sgvabase; /* base of the sgva space */
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bus_size_t aps_sgvasize; /* size of the sgva space */
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bus_addr_t aps_pa; /* Address in region */
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};
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void vax_sgmap_init __P((bus_dma_tag_t, struct vax_sgmap *,
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const char *, bus_addr_t, bus_size_t, struct pte *, bus_size_t));
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int vax_sgmap_alloc __P((bus_dmamap_t, bus_size_t,
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struct vax_sgmap *, int));
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void vax_sgmap_free __P((bus_dmamap_t, struct vax_sgmap *));
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int vax_sgmap_load __P((bus_dma_tag_t, bus_dmamap_t, void *,
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bus_size_t, struct proc *, int, struct vax_sgmap *));
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int vax_sgmap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t,
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struct mbuf *, int, struct vax_sgmap *));
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int vax_sgmap_load_uio __P((bus_dma_tag_t, bus_dmamap_t,
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struct uio *, int, struct vax_sgmap *));
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int vax_sgmap_load_raw __P((bus_dma_tag_t, bus_dmamap_t,
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bus_dma_segment_t *, int, bus_size_t, int, struct vax_sgmap *));
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void vax_sgmap_unload __P(( bus_dma_tag_t, bus_dmamap_t,
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struct vax_sgmap *));
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#endif /* _ALPHA_COMMON_SGMAPVAR_H */
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@ -0,0 +1,330 @@
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/* $NetBSD: sgmap.c,v 1.1 1999/06/06 18:58:50 ragge Exp $ */
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/*-
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* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <vm/vm.h>
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#include <machine/bus.h>
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#include <machine/sgmap.h>
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void
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vax_sgmap_init(t, sgmap, name, sgvabase, sgvasize, ptva, minptalign)
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bus_dma_tag_t t;
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struct vax_sgmap *sgmap;
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const char *name;
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bus_addr_t sgvabase;
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bus_size_t sgvasize;
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struct pte *ptva;
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bus_size_t minptalign;
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{
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bus_dma_segment_t seg;
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size_t ptsize;
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int rseg;
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if (sgvasize & PGOFSET) {
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printf("size botch for sgmap `%s'\n", name);
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goto die;
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}
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sgmap->aps_sgvabase = sgvabase;
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sgmap->aps_sgvasize = sgvasize;
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if (ptva != NULL) {
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/*
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* We already have a page table; this may be a system
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* where the page table resides in bridge-resident SRAM.
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*/
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sgmap->aps_pt = ptva;
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} else {
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/*
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* Compute the page table size and allocate it. At minimum,
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* this must be aligned to the page table size. However,
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* some platforms have more strict alignment reqirements.
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*/
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ptsize = (sgvasize / VAX_NBPG) * sizeof(struct pte);
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if (minptalign != 0) {
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if (minptalign < ptsize)
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minptalign = ptsize;
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} else
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minptalign = ptsize;
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if (bus_dmamem_alloc(t, ptsize, minptalign, 0, &seg, 1, &rseg,
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BUS_DMA_NOWAIT)) {
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panic("unable to allocate page table for sgmap `%s'\n",
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name);
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goto die;
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}
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sgmap->aps_pt = (struct pte *)(seg.ds_addr | KERNBASE);
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}
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/*
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* Create the extent map used to manage the virtual address
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* space.
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*/
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sgmap->aps_ex = extent_create((char *)name, sgvabase, sgvasize - 1,
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M_DMAMAP, NULL, 0, EX_NOWAIT|EX_NOCOALESCE);
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if (sgmap->aps_ex == NULL) {
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printf("unable to create extent map for sgmap `%s'\n", name);
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goto die;
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}
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return;
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die:
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panic("vax_sgmap_init");
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}
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int
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vax_sgmap_alloc(map, origlen, sgmap, flags)
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bus_dmamap_t map;
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bus_size_t origlen;
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struct vax_sgmap *sgmap;
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int flags;
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{
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int error;
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bus_size_t len = origlen;
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#ifdef DIAGNOSTIC
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if (map->_dm_flags & DMAMAP_HAS_SGMAP)
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panic("vax_sgmap_alloc: already have sgva space");
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#endif
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map->_dm_sgvalen = round_page(len);
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#if 0
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printf("len %x -> %x, _dm_sgvalen %x _dm_boundary %x boundary %x -> ",
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origlen, len, map->_dm_sgvalen, map->_dm_boundary, boundary);
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#endif
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error = extent_alloc(sgmap->aps_ex, map->_dm_sgvalen, VAX_NBPG,
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0, (flags & BUS_DMA_NOWAIT) ? EX_NOWAIT : EX_WAITOK,
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&map->_dm_sgva);
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#if 0
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printf("error %d _dm_sgva %x\n", error, map->_dm_sgva);
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#endif
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if (error == 0)
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map->_dm_flags |= DMAMAP_HAS_SGMAP;
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else
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map->_dm_flags &= ~DMAMAP_HAS_SGMAP;
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return (error);
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}
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void
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vax_sgmap_free(map, sgmap)
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bus_dmamap_t map;
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struct vax_sgmap *sgmap;
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{
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#ifdef DIAGNOSTIC
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if ((map->_dm_flags & DMAMAP_HAS_SGMAP) == 0)
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panic("vax_sgmap_free: no sgva space to free");
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#endif
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if (extent_free(sgmap->aps_ex, map->_dm_sgva, map->_dm_sgvalen,
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EX_NOWAIT))
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panic("vax_sgmap_free");
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map->_dm_flags &= ~DMAMAP_HAS_SGMAP;
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}
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int
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vax_sgmap_load(t, map, buf, buflen, p, flags, sgmap)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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void *buf;
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bus_size_t buflen;
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struct proc *p;
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int flags;
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struct vax_sgmap *sgmap;
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{
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vaddr_t endva, va = (vaddr_t)buf;
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paddr_t pa;
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bus_addr_t dmaoffset;
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bus_size_t dmalen;
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long *pte, *page_table = (long *)sgmap->aps_pt;
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int pteidx, error;
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/*
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* Make sure that on error condition we return "no valid mappings".
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*/
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map->dm_mapsize = 0;
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map->dm_nsegs = 0;
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if (buflen > map->_dm_size)
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return (EINVAL);
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/*
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* Remember the offset into the first page and the total
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* transfer length.
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*/
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dmaoffset = ((u_long)buf) & VAX_PGOFSET;
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dmalen = buflen;
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/*
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* Allocate the necessary virtual address space for the
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* mapping. Round the size, since we deal with whole pages.
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*
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* alpha_sgmap_alloc will deal with the appropriate spill page
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* allocations.
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*
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*/
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endva = round_page(va + buflen);
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va = trunc_page(va);
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if ((map->_dm_flags & DMAMAP_HAS_SGMAP) == 0) {
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error = vax_sgmap_alloc(map, (endva - va), sgmap, flags);
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if (error)
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return (error);
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}
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pteidx = map->_dm_sgva >> VAX_PGSHIFT;
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pte = &page_table[pteidx];
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/*
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* Generate the DMA address.
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*/
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map->dm_segs[0].ds_addr = map->_dm_sgva + dmaoffset;
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map->dm_segs[0].ds_len = dmalen;
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map->_dm_pteidx = pteidx;
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map->_dm_ptecnt = 0;
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/*
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* Create the bus-specific page tables.
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* Can be done much more efficient than this.
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*/
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for (; va < endva; va += VAX_NBPG, pteidx++,
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pte = &page_table[pteidx], map->_dm_ptecnt++) {
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/*
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* Get the physical address for this segment.
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*/
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if (p != NULL)
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pa = pmap_extract(p->p_vmspace->vm_map.pmap, va);
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else
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pa = kvtophys(va);
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if (pa == 0)
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panic("vax_sgmap_load");
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/*
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* Load the current PTE with this page.
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*/
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*pte = (pa >> VAX_PGSHIFT) | PG_V;
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}
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map->dm_mapsize = buflen;
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map->dm_nsegs = 1;
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return (0);
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}
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int
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vax_sgmap_load_mbuf(t, map, m, flags, sgmap)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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struct mbuf *m;
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int flags;
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struct vax_sgmap *sgmap;
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{
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panic("vax_sgmap_load_mbuf : not implemented");
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}
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int
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vax_sgmap_load_uio(t, map, uio, flags, sgmap)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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struct uio *uio;
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int flags;
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struct vax_sgmap *sgmap;
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{
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panic("vax_sgmap_load_uio : not implemented");
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}
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int
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vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, sgmap)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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bus_dma_segment_t *segs;
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int nsegs;
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bus_size_t size;
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int flags;
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struct vax_sgmap *sgmap;
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{
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panic("vax_sgmap_load_raw : not implemented");
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}
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void
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vax_sgmap_unload(t, map, sgmap)
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bus_dma_tag_t t;
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bus_dmamap_t map;
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struct vax_sgmap *sgmap;
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{
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long *pte, *page_table = (long *)sgmap->aps_pt;
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int ptecnt, pteidx;
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/*
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* Invalidate the PTEs for the mapping.
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*/
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for (ptecnt = map->_dm_ptecnt, pteidx = map->_dm_pteidx,
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pte = &page_table[pteidx];
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ptecnt != 0;
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ptecnt--, pteidx++,
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pte = &page_table[pteidx]) {
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*pte = 0;
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}
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/*
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* Free the virtual address space used by the mapping
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* if necessary.
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*/
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if ((map->_dm_flags & BUS_DMA_ALLOCNOW) == 0)
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vax_sgmap_free(map, sgmap);
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/*
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* Mark the mapping invalid.
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*/
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map->dm_mapsize = 0;
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map->dm_nsegs = 0;
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}
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