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/* $OpenBSD: rbus.c,v 1.16 2010/09/22 02:28:37 jsg Exp $ */
/* $NetBSD: rbus.c,v 1.3 1999/11/06 06:20:53 soren Exp $ */
/*
* Copyright (c) 1999
* HAYAKAWA Koichi. 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 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/device.h>
#include <sys/malloc.h>
#include <sys/extent.h>
#include <machine/bus.h>
#include <dev/cardbus/rbus.h>
/* #define RBUS_DEBUG */
#if defined RBUS_DEBUG
#define STATIC
#define DPRINTF(a) printf a
#else
#ifdef DDB
#define STATIC
#else
#define STATIC static
#endif
#define DPRINTF(a)
#endif
int
rbus_space_alloc(rbus_tag_t rbt, bus_addr_t addr, bus_size_t size,
bus_addr_t mask, bus_addr_t align, int flags, bus_addr_t *addrp,
bus_space_handle_t *bshp)
{
return (rbus_space_alloc_subregion(rbt, rbt->rb_start, rbt->rb_end,
addr, size, mask, align, flags, addrp, bshp));
}
int
rbus_space_alloc_subregion(rbus_tag_t rbt, bus_addr_t substart,
bus_addr_t subend, bus_addr_t addr, bus_size_t size,
bus_addr_t mask, bus_addr_t align, int flags, bus_addr_t *addrp,
bus_space_handle_t *bshp)
{
bus_addr_t decodesize = mask + 1;
bus_addr_t boundary, search_addr;
int val;
u_long result;
int exflags = EX_FAST | EX_NOWAIT | EX_MALLOCOK;
DPRINTF(("rbus_space_alloc: addr %lx, size %lx, mask %lx, align %lx\n",
(u_long)addr, (u_long)size, (u_long)mask, (u_long)align));
if (mask == 0) {
/* FULL Decode */
decodesize = 0;
}
if (rbt->rb_flags == RBUS_SPACE_SHARE ||
rbt->rb_flags == RBUS_SPACE_DEDICATE) {
/* rbt has its own sh_extent */
/* sanity check: the subregion [substart, subend] should be
smaller than the region included in sh_extent */
if (substart < rbt->rb_ext->ex_start ||
subend > rbt->rb_ext->ex_end) {
DPRINTF(("rbus: out of range\n"));
return (1);
}
if (decodesize == align) {
if (extent_alloc_subregion(rbt->rb_ext, substart,
subend, size, align, 0, 0, exflags, &result))
return (1);
} else if (decodesize == 0) {
/* maybe, the register is overflowed. */
if (extent_alloc_subregion(rbt->rb_ext, addr,
addr + size, size, 1, 0, 0, exflags, &result))
return (1);
} else {
boundary = decodesize > align ? decodesize : align;
search_addr = (substart & ~(boundary - 1)) + addr;
if (search_addr < substart)
search_addr += boundary;
val = 1;
for (; search_addr + size <= subend;
search_addr += boundary) {
val = extent_alloc_subregion(
rbt->rb_ext,search_addr,
search_addr + size, size, align, 0, 0,
exflags, &result);
DPRINTF(("rbus: trying [%lx:%lx] %lx\n",
(u_long)search_addr,
(u_long)search_addr + size,
(u_long)align));
if (val == 0)
break;
}
if (val != 0) {
/* no space found */
DPRINTF(("rbus: no space found\n"));
return (1);
}
}
if (md_space_map(rbt, result, size, flags, bshp)) {
/* map failed */
extent_free(rbt->rb_ext, result, size, exflags);
return (1);
}
if (addrp != NULL)
*addrp = result;
return (0);
} else {
/* error!! */
DPRINTF(("rbus: no rbus type\n"));
return (1);
}
}
int
rbus_space_free(rbus_tag_t rbt, bus_space_handle_t bsh, bus_size_t size,
bus_addr_t *addrp)
{
int exflags = EX_FAST | EX_NOWAIT;
bus_addr_t addr;
int status = 1;
if (rbt->rb_flags == RBUS_SPACE_SHARE ||
rbt->rb_flags == RBUS_SPACE_DEDICATE) {
md_space_unmap(rbt, bsh, size, &addr);
extent_free(rbt->rb_ext, addr, size, exflags);
status = 0;
} else {
/* error. INVALID rbustag */
status = 1;
}
if (addrp != NULL)
*addrp = addr;
return (status);
}
/*
* rbus_tag_t
* rbus_new_body(bus_space_tag_t bt,
* struct extent *ex, bus_addr_t start, bus_size_t end,
* int flags)
*
*/
rbus_tag_t
rbus_new_body(bus_space_tag_t bt, struct extent *ex,
bus_addr_t start, bus_addr_t end, int flags)
{
rbus_tag_t rb;
if ((rb = (rbus_tag_t)malloc(sizeof(struct rbustag), M_DEVBUF,
M_NOWAIT)) == NULL) {
panic("no memory for rbus instance");
}
rb->rb_bt = bt;
rb->rb_start = start;
rb->rb_end = end;
rb->rb_flags = flags;
rb->rb_ext = ex;
DPRINTF(("rbus_new_body: [%lx, %lx] type %s name [%s]\n",
(u_long)start, (u_long)end,
flags == RBUS_SPACE_SHARE ? "share" :
flags == RBUS_SPACE_DEDICATE ? "dedicated" : "invalid",
ex != NULL ? ex->ex_name : "noname"));
return (rb);
}
/*
* rbus_tag_t rbus_new_root_delegate(bus_space_tag, bus_addr_t,
* bus_size_t)
*
* This function makes a root rbus instance.
*/
rbus_tag_t
rbus_new_root_delegate(bus_space_tag_t bt, bus_addr_t start, bus_size_t size)
{
rbus_tag_t rb;
struct extent *ex;
if ((ex = extent_create("rbus root", start, start + size, M_DEVBUF,
NULL, 0, EX_NOCOALESCE|EX_NOWAIT)) == NULL)
return (NULL);
rb = rbus_new_body(bt, ex, start, start + size,
RBUS_SPACE_DEDICATE);
if (rb == NULL)
extent_destroy(ex);
return (rb);
}
/*
* rbus_tag_t rbus_new_root_share(bus_space_tag, struct extent *,
* bus_addr_t, bus_size_t)
*
* This function makes a root rbus instance.
*/
rbus_tag_t
rbus_new_root_share(bus_space_tag_t bt, struct extent *ex, bus_addr_t start,
bus_size_t size)
{
/* sanity check */
if (start < ex->ex_start || start + size > ex->ex_end) {
/* out of range: [start, size] should be contained in
* parent space
*/
return (0);
/* Should I invoke panic? */
}
return (rbus_new_body(bt, ex, start, start + size,
RBUS_SPACE_SHARE));
}
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