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/* $OpenBSD: agp_machdep.c,v 1.19 2014/09/20 16:15:16 kettenis Exp $ */
/*
* Copyright (c) 2008 - 2009 Owain G. Ainsworth <oga@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Copyright (c) 2002 Michael Shalayeff
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR OR HIS RELATIVES 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 MIND, 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/malloc.h>
#include <sys/rwlock.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/agpvar.h>
#include <uvm/uvm_extern.h>
#include <machine/cpufunc.h>
#include <machine/bus.h>
#include <machine/pmap.h>
void
agp_flush_cache(void)
{
wbinvd();
}
void
agp_flush_cache_range(vaddr_t va, vsize_t sz)
{
pmap_flush_cache(va, sz);
}
struct agp_map {
bus_space_tag_t bst;
bus_addr_t addr;
bus_size_t size;
int flags;
vaddr_t va;
};
extern struct extent *iomem_ex;
int
agp_init_map(bus_space_tag_t tag, bus_addr_t address, bus_size_t size,
int flags, struct agp_map **mapp)
{
struct agp_map *map;
int error;
KASSERT(tag == I386_BUS_SPACE_MEM);
/*
* We grab the extent out of the bus region ourselves
* so we don't need to do these allocations every time.
*/
error = extent_alloc_region(iomem_ex, address, size,
EX_NOWAIT | EX_MALLOCOK);
if (error)
return (error);
map = malloc(sizeof(*map), M_AGP, M_WAITOK | M_CANFAIL);
if (map == NULL)
return (ENOMEM);
map->bst = tag;
map->addr = address;
map->size = size;
map->flags = flags;
map->va = (vaddr_t)km_alloc(PAGE_SIZE, &kv_any, &kp_none, &kd_waitok);
if (map->va == 0) {
free(map, M_AGP, sizeof(*map));
return (ENOMEM);
}
*mapp = map;
return (0);
}
void
agp_destroy_map(struct agp_map *map)
{
if (extent_free(iomem_ex, map->addr, map->size,
EX_NOWAIT | EX_MALLOCOK ))
printf("%s: can't free region\n",__func__);
km_free((void *)map->va, PAGE_SIZE, &kv_any, &kp_none);
free(map, M_AGP, sizeof(*map));
}
int
agp_map_subregion(struct agp_map *map, bus_size_t offset, bus_size_t size,
bus_space_handle_t *bshp)
{
return (_bus_space_map(map->bst, map->addr + offset, size,
map->flags, bshp));
}
void
agp_unmap_subregion(struct agp_map *map, bus_space_handle_t bsh,
bus_size_t size)
{
return (_bus_space_unmap(map->bst, bsh, size, NULL));
}
void
agp_map_atomic(struct agp_map *map, bus_size_t offset,
bus_space_handle_t *bshp)
{
int pmap_flags = PMAP_NOCACHE;
paddr_t pa;
KASSERT((offset & PGOFSET) == 0);
if (map->flags & BUS_SPACE_MAP_CACHEABLE)
pmap_flags = 0;
else if (map->flags & BUS_SPACE_MAP_PREFETCHABLE)
pmap_flags = PMAP_WC;
pa = bus_space_mmap(map->bst, map->addr, offset, 0, 0);
pmap_kenter_pa(map->va, pa | pmap_flags, VM_PROT_READ | VM_PROT_WRITE);
pmap_update(pmap_kernel());
*bshp = (bus_space_handle_t)map->va;
}
void
agp_unmap_atomic(struct agp_map *map, bus_space_handle_t bsh)
{
KASSERT(bsh == (bus_space_handle_t)map->va);
pmap_kremove(map->va, PAGE_SIZE);
pmap_update(pmap_kernel());
}
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