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linux/drivers/pcmcia/rsrc_mgr.c
Dominik Brodowski 3b7a17fcda resource/PCI: mark struct resource as const
Now that we return the new resource start position, there is no
need to update "struct resource" inside the align function.
Therefore, mark the struct resource as const.

Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-02-22 16:16:57 -08:00

198 lines
4.5 KiB
C

/*
* rsrc_mgr.c -- Resource management routines and/or wrappers
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The initial developer of the original code is David A. Hinds
* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
*
* (C) 1999 David A. Hinds
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include "cs_internal.h"
int pcmcia_validate_mem(struct pcmcia_socket *s)
{
if (s->resource_ops->validate_mem)
return s->resource_ops->validate_mem(s);
/* if there is no callback, we can assume that everything is OK */
return 0;
}
EXPORT_SYMBOL(pcmcia_validate_mem);
int pcmcia_adjust_io_region(struct resource *res, unsigned long r_start,
unsigned long r_end, struct pcmcia_socket *s)
{
if (s->resource_ops->adjust_io_region)
return s->resource_ops->adjust_io_region(res, r_start, r_end, s);
return -ENOMEM;
}
EXPORT_SYMBOL(pcmcia_adjust_io_region);
struct resource *pcmcia_find_io_region(unsigned long base, int num,
unsigned long align, struct pcmcia_socket *s)
{
if (s->resource_ops->find_io)
return s->resource_ops->find_io(base, num, align, s);
return NULL;
}
EXPORT_SYMBOL(pcmcia_find_io_region);
struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
int low, struct pcmcia_socket *s)
{
if (s->resource_ops->find_mem)
return s->resource_ops->find_mem(base, num, align, low, s);
return NULL;
}
EXPORT_SYMBOL(pcmcia_find_mem_region);
void release_resource_db(struct pcmcia_socket *s)
{
if (s->resource_ops->exit)
s->resource_ops->exit(s);
}
static int static_init(struct pcmcia_socket *s)
{
unsigned long flags;
/* the good thing about SS_CAP_STATIC_MAP sockets is
* that they don't need a resource database */
spin_lock_irqsave(&s->lock, flags);
s->resource_setup_done = 1;
spin_unlock_irqrestore(&s->lock, flags);
return 0;
}
struct pccard_resource_ops pccard_static_ops = {
.validate_mem = NULL,
.adjust_io_region = NULL,
.find_io = NULL,
.find_mem = NULL,
.add_io = NULL,
.add_mem = NULL,
.init = static_init,
.exit = NULL,
};
EXPORT_SYMBOL(pccard_static_ops);
#ifdef CONFIG_PCCARD_IODYN
static struct resource *
make_resource(unsigned long b, unsigned long n, int flags, char *name)
{
struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
if (res) {
res->name = name;
res->start = b;
res->end = b + n - 1;
res->flags = flags;
}
return res;
}
struct pcmcia_align_data {
unsigned long mask;
unsigned long offset;
};
static resource_size_t pcmcia_align(void *align_data,
const struct resource *res,
resource_size_t size, resource_size_t align)
{
struct pcmcia_align_data *data = align_data;
resource_size_t start;
start = (res->start & ~data->mask) + data->offset;
if (start < res->start)
start += data->mask + 1;
#ifdef CONFIG_X86
if (res->flags & IORESOURCE_IO) {
if (start & 0x300) {
start = (start + 0x3ff) & ~0x3ff;
}
}
#endif
#ifdef CONFIG_M68K
if (res->flags & IORESOURCE_IO) {
if ((res->start + size - 1) >= 1024)
start = res->end;
}
#endif
return start;
}
static int iodyn_adjust_io_region(struct resource *res, unsigned long r_start,
unsigned long r_end, struct pcmcia_socket *s)
{
return adjust_resource(res, r_start, r_end - r_start + 1);
}
static struct resource *iodyn_find_io_region(unsigned long base, int num,
unsigned long align, struct pcmcia_socket *s)
{
struct resource *res = make_resource(0, num, IORESOURCE_IO,
dev_name(&s->dev));
struct pcmcia_align_data data;
unsigned long min = base;
int ret;
if (align == 0)
align = 0x10000;
data.mask = align - 1;
data.offset = base & data.mask;
#ifdef CONFIG_PCI
if (s->cb_dev) {
ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
min, 0, pcmcia_align, &data);
} else
#endif
ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
1, pcmcia_align, &data);
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
struct pccard_resource_ops pccard_iodyn_ops = {
.validate_mem = NULL,
.adjust_io_region = iodyn_adjust_io_region,
.find_io = iodyn_find_io_region,
.find_mem = NULL,
.add_io = NULL,
.add_mem = NULL,
.init = static_init,
.exit = NULL,
};
EXPORT_SYMBOL(pccard_iodyn_ops);
#endif /* CONFIG_PCCARD_IODYN */