rsrc_nonstatic.c 27.5 KB
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/*
 * rsrc_nonstatic.c -- Resource management routines for !SS_CAP_STATIC_MAP sockets
 *
 * 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/moduleparam.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/timer.h>
#include <linux/pci.h>
#include <linux/device.h>
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#include <linux/io.h>
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#include <asm/irq.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include "cs_internal.h"

MODULE_AUTHOR("David A. Hinds, Dominik Brodowski");
MODULE_LICENSE("GPL");

/* Parameters that can be set with 'insmod' */

#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)

INT_MODULE_PARM(probe_mem,	1);		/* memory probe? */
#ifdef CONFIG_PCMCIA_PROBE
INT_MODULE_PARM(probe_io,	1);		/* IO port probe? */
INT_MODULE_PARM(mem_limit,	0x10000);
#endif

/* for io_db and mem_db */
struct resource_map {
	u_long			base, num;
	struct resource_map	*next;
};

struct socket_data {
	struct resource_map		mem_db;
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	struct resource_map		mem_db_valid;
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	struct resource_map		io_db;
};

#define MEM_PROBE_LOW	(1 << 0)
#define MEM_PROBE_HIGH	(1 << 1)


/*======================================================================

    Linux resource management extensions

======================================================================*/

static struct resource *
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make_resource(resource_size_t b, resource_size_t n, int flags, const char *name)
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{
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	struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
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	if (res) {
		res->name = name;
		res->start = b;
		res->end = b + n - 1;
		res->flags = flags;
	}
	return res;
}

static struct resource *
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claim_region(struct pcmcia_socket *s, resource_size_t base,
		resource_size_t size, int type, char *name)
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{
	struct resource *res, *parent;

	parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
	res = make_resource(base, size, type | IORESOURCE_BUSY, name);

	if (res) {
#ifdef CONFIG_PCI
		if (s && s->cb_dev)
			parent = pci_find_parent_resource(s->cb_dev, res);
#endif
		if (!parent || request_resource(parent, res)) {
			kfree(res);
			res = NULL;
		}
	}
	return res;
}

static void free_region(struct resource *res)
{
	if (res) {
		release_resource(res);
		kfree(res);
	}
}

/*======================================================================

    These manage the internal databases of available resources.

======================================================================*/

static int add_interval(struct resource_map *map, u_long base, u_long num)
{
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	struct resource_map *p, *q;
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	for (p = map; ; p = p->next) {
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		if ((p != map) && (p->base+p->num >= base)) {
			p->num = max(num + base - p->base, p->num);
			return 0;
		}
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		if ((p->next == map) || (p->next->base > base+num-1))
			break;
	}
	q = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
	if (!q) {
		printk(KERN_WARNING "out of memory to update resources\n");
		return -ENOMEM;
	}
	q->base = base; q->num = num;
	q->next = p->next; p->next = q;
	return 0;
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}

/*====================================================================*/

static int sub_interval(struct resource_map *map, u_long base, u_long num)
{
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	struct resource_map *p, *q;

	for (p = map; ; p = q) {
		q = p->next;
		if (q == map)
			break;
		if ((q->base+q->num > base) && (base+num > q->base)) {
			if (q->base >= base) {
				if (q->base+q->num <= base+num) {
					/* Delete whole block */
					p->next = q->next;
					kfree(q);
					/* don't advance the pointer yet */
					q = p;
				} else {
					/* Cut off bit from the front */
					q->num = q->base + q->num - base - num;
					q->base = base + num;
				}
			} else if (q->base+q->num <= base+num) {
				/* Cut off bit from the end */
				q->num = base - q->base;
			} else {
				/* Split the block into two pieces */
				p = kmalloc(sizeof(struct resource_map),
					GFP_KERNEL);
				if (!p) {
					printk(KERN_WARNING "out of memory to update resources\n");
					return -ENOMEM;
				}
				p->base = base+num;
				p->num = q->base+q->num - p->base;
				q->num = base - q->base;
				p->next = q->next ; q->next = p;
			}
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		}
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	}
	return 0;
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}

/*======================================================================

    These routines examine a region of IO or memory addresses to
    determine what ranges might be genuinely available.

======================================================================*/

#ifdef CONFIG_PCMCIA_PROBE
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static void do_io_probe(struct pcmcia_socket *s, unsigned int base,
			unsigned int num)
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{
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	struct resource *res;
	struct socket_data *s_data = s->resource_data;
	unsigned int i, j, bad;
	int any;
	u_char *b, hole, most;

	dev_printk(KERN_INFO, &s->dev, "cs: IO port probe %#x-%#x:",
		base, base+num-1);

	/* First, what does a floating port look like? */
	b = kzalloc(256, GFP_KERNEL);
	if (!b) {
		printk("\n");
		dev_printk(KERN_ERR, &s->dev,
			"do_io_probe: unable to kmalloc 256 bytes");
		return;
	}
	for (i = base, most = 0; i < base+num; i += 8) {
		res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
		if (!res)
			continue;
		hole = inb(i);
		for (j = 1; j < 8; j++)
			if (inb(i+j) != hole)
				break;
		free_region(res);
		if ((j == 8) && (++b[hole] > b[most]))
			most = hole;
		if (b[most] == 127)
			break;
	}
	kfree(b);

	bad = any = 0;
	for (i = base; i < base+num; i += 8) {
		res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
		if (!res)
			continue;
		for (j = 0; j < 8; j++)
			if (inb(i+j) != most)
				break;
		free_region(res);
		if (j < 8) {
			if (!any)
				printk(" excluding");
			if (!bad)
				bad = any = i;
		} else {
			if (bad) {
				sub_interval(&s_data->io_db, bad, i-bad);
				printk(" %#x-%#x", bad, i-1);
				bad = 0;
			}
		}
	}
	if (bad) {
		if ((num > 16) && (bad == base) && (i == base+num)) {
			printk(" nothing: probe failed.\n");
			return;
		} else {
			sub_interval(&s_data->io_db, bad, i-bad);
			printk(" %#x-%#x", bad, i-1);
		}
	}

	printk(any ? "\n" : " clean.\n");
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}
#endif

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/*======================================================================*/
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/**
 * readable() - iomem validation function for cards with a valid CIS
 */
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static int readable(struct pcmcia_socket *s, struct resource *res,
		    unsigned int *count)
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{
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	int ret = -EINVAL;
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	if (s->fake_cis) {
		dev_dbg(&s->dev, "fake CIS is being used: can't validate mem\n");
		return 0;
	}
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	s->cis_mem.res = res;
	s->cis_virt = ioremap(res->start, s->map_size);
	if (s->cis_virt) {
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		mutex_unlock(&s->ops_mutex);
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		/* as we're only called from pcmcia.c, we're safe */
		if (s->callback->validate)
			ret = s->callback->validate(s, count);
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		/* invalidate mapping */
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		mutex_lock(&s->ops_mutex);
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		iounmap(s->cis_virt);
		s->cis_virt = NULL;
	}
	s->cis_mem.res = NULL;
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	if ((ret) || (*count == 0))
		return -EINVAL;
	return 0;
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}

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/**
 * checksum() - iomem validation function for simple memory cards
 */
static int checksum(struct pcmcia_socket *s, struct resource *res,
		    unsigned int *value)
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{
	pccard_mem_map map;
	int i, a = 0, b = -1, d;
	void __iomem *virt;

	virt = ioremap(res->start, s->map_size);
	if (virt) {
		map.map = 0;
		map.flags = MAP_ACTIVE;
		map.speed = 0;
		map.res = res;
		map.card_start = 0;
		s->ops->set_mem_map(s, &map);

		/* Don't bother checking every word... */
		for (i = 0; i < s->map_size; i += 44) {
			d = readl(virt+i);
			a += d;
			b &= d;
		}

		map.flags = 0;
		s->ops->set_mem_map(s, &map);

		iounmap(virt);
	}

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	if (b == -1)
		return -EINVAL;
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	*value = a;
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	return 0;
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}

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/**
 * do_validate_mem() - low level validate a memory region for PCMCIA use
 * @s:		PCMCIA socket to validate
 * @base:	start address of resource to check
 * @size:	size of resource to check
 * @validate:	validation function to use
 *
 * do_validate_mem() splits up the memory region which is to be checked
 * into two parts. Both are passed to the @validate() function. If
 * @validate() returns non-zero, or the value parameter to @validate()
 * is zero, or the value parameter is different between both calls,
 * the check fails, and -EINVAL is returned. Else, 0 is returned.
 */
static int do_validate_mem(struct pcmcia_socket *s,
			   unsigned long base, unsigned long size,
			   int validate (struct pcmcia_socket *s,
					 struct resource *res,
					 unsigned int *value))
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{
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	struct socket_data *s_data = s->resource_data;
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	struct resource *res1, *res2;
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	unsigned int info1 = 1, info2 = 1;
	int ret = -EINVAL;
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	res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe");
	res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM,
			"PCMCIA memprobe");
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	if (res1 && res2) {
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		ret = 0;
		if (validate) {
			ret = validate(s, res1, &info1);
			ret += validate(s, res2, &info2);
		}
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	}

	free_region(res2);
	free_region(res1);

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	dev_dbg(&s->dev, "cs: memory probe 0x%06lx-0x%06lx: %p %p %u %u %u",
		base, base+size-1, res1, res2, ret, info1, info2);
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	if ((ret) || (info1 != info2) || (info1 == 0))
		return -EINVAL;
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	if (validate && !s->fake_cis) {
		/* move it to the validated data set */
		add_interval(&s_data->mem_db_valid, base, size);
		sub_interval(&s_data->mem_db, base, size);
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	}

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	return 0;
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}


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/**
 * do_mem_probe() - validate a memory region for PCMCIA use
 * @s:		PCMCIA socket to validate
 * @base:	start address of resource to check
 * @num:	size of resource to check
 * @validate:	validation function to use
 * @fallback:	validation function to use if validate fails
 *
 * do_mem_probe() checks a memory region for use by the PCMCIA subsystem.
 * To do so, the area is split up into sensible parts, and then passed
 * into the @validate() function. Only if @validate() and @fallback() fail,
 * the area is marked as unavaibale for use by the PCMCIA subsystem. The
 * function returns the size of the usable memory area.
 */
static int do_mem_probe(struct pcmcia_socket *s, u_long base, u_long num,
			int validate (struct pcmcia_socket *s,
				      struct resource *res,
				      unsigned int *value),
			int fallback (struct pcmcia_socket *s,
				      struct resource *res,
				      unsigned int *value))
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{
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	struct socket_data *s_data = s->resource_data;
	u_long i, j, bad, fail, step;

	dev_printk(KERN_INFO, &s->dev, "cs: memory probe 0x%06lx-0x%06lx:",
		base, base+num-1);
	bad = fail = 0;
	step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
	/* don't allow too large steps */
	if (step > 0x800000)
		step = 0x800000;
	/* cis_readable wants to map 2x map_size */
	if (step < 2 * s->map_size)
		step = 2 * s->map_size;
	for (i = j = base; i < base+num; i = j + step) {
		if (!fail) {
			for (j = i; j < base+num; j += step) {
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				if (!do_validate_mem(s, j, step, validate))
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					break;
			}
			fail = ((i == base) && (j == base+num));
		}
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		if ((fail) && (fallback)) {
			for (j = i; j < base+num; j += step)
				if (!do_validate_mem(s, j, step, fallback))
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					break;
		}
		if (i != j) {
			if (!bad)
				printk(" excluding");
			printk(" %#05lx-%#05lx", i, j-1);
			sub_interval(&s_data->mem_db, i, j-i);
			bad += j-i;
		}
	}
	printk(bad ? "\n" : " clean.\n");
	return num - bad;
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}

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#ifdef CONFIG_PCMCIA_PROBE

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/**
 * inv_probe() - top-to-bottom search for one usuable high memory area
 * @s:		PCMCIA socket to validate
 * @m:		resource_map to check
 */
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static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s)
{
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	struct socket_data *s_data = s->resource_data;
	u_long ok;
	if (m == &s_data->mem_db)
		return 0;
	ok = inv_probe(m->next, s);
	if (ok) {
		if (m->base >= 0x100000)
			sub_interval(&s_data->mem_db, m->base, m->num);
		return ok;
	}
	if (m->base < 0x100000)
		return 0;
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	return do_mem_probe(s, m->base, m->num, readable, checksum);
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}

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/**
 * validate_mem() - memory probe function
 * @s:		PCMCIA socket to validate
 * @probe_mask: MEM_PROBE_LOW | MEM_PROBE_HIGH
 *
 * The memory probe.  If the memory list includes a 64K-aligned block
 * below 1MB, we probe in 64K chunks, and as soon as we accumulate at
 * least mem_limit free space, we quit. Returns 0 on usuable ports.
 */
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static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
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{
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	struct resource_map *m, mm;
	static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
	unsigned long b, i, ok = 0;
	struct socket_data *s_data = s->resource_data;
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	/* We do up to four passes through the list */
	if (probe_mask & MEM_PROBE_HIGH) {
		if (inv_probe(s_data->mem_db.next, s) > 0)
			return 0;
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		if (s_data->mem_db_valid.next != &s_data->mem_db_valid)
			return 0;
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		dev_printk(KERN_NOTICE, &s->dev,
			   "cs: warning: no high memory space available!\n");
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		return -ENODEV;
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	}
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	for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
		mm = *m;
		/* Only probe < 1 MB */
		if (mm.base >= 0x100000)
			continue;
		if ((mm.base | mm.num) & 0xffff) {
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			ok += do_mem_probe(s, mm.base, mm.num, readable,
					   checksum);
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			continue;
		}
		/* Special probe for 64K-aligned block */
		for (i = 0; i < 4; i++) {
			b = order[i] << 12;
			if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) {
				if (ok >= mem_limit)
					sub_interval(&s_data->mem_db, b, 0x10000);
				else
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					ok += do_mem_probe(s, b, 0x10000,
							   readable, checksum);
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			}
		}
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	}
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	if (ok > 0)
		return 0;

	return -ENODEV;
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}

#else /* CONFIG_PCMCIA_PROBE */

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/**
 * validate_mem() - memory probe function
 * @s:		PCMCIA socket to validate
 * @probe_mask: ignored
 *
 * Returns 0 on usuable ports.
 */
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static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
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{
	struct resource_map *m, mm;
	struct socket_data *s_data = s->resource_data;
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	unsigned long ok = 0;
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	for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
		mm = *m;
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		ok += do_mem_probe(s, mm.base, mm.num, readable, checksum);
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	}
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	if (ok > 0)
		return 0;
	return -ENODEV;
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}

#endif /* CONFIG_PCMCIA_PROBE */


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/**
 * pcmcia_nonstatic_validate_mem() - try to validate iomem for PCMCIA use
 * @s:		PCMCIA socket to validate
 *
 * This is tricky... when we set up CIS memory, we try to validate
 * the memory window space allocations.
 *
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 * Locking note: Must be called with skt_mutex held!
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 */
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static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
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{
	struct socket_data *s_data = s->resource_data;
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	unsigned int probe_mask = MEM_PROBE_LOW;
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	int ret;
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	if (!probe_mem || !(s->state & SOCKET_PRESENT))
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		return 0;
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	if (s->features & SS_CAP_PAGE_REGS)
		probe_mask = MEM_PROBE_HIGH;
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	ret = validate_mem(s, probe_mask);
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	if (s_data->mem_db_valid.next != &s_data->mem_db_valid)
		return 0;
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	return ret;
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}

struct pcmcia_align_data {
	unsigned long	mask;
	unsigned long	offset;
	struct resource_map	*map;
};

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static resource_size_t
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pcmcia_common_align(void *align_data, const struct resource *res,
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			resource_size_t size, resource_size_t align)
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{
	struct pcmcia_align_data *data = align_data;
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	resource_size_t start;
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	/*
	 * Ensure that we have the correct start address
	 */
	start = (res->start & ~data->mask) + data->offset;
	if (start < res->start)
		start += data->mask + 1;
611
	return start;
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}

614
static resource_size_t
615 616
pcmcia_align(void *align_data, const struct resource *res,
	resource_size_t size, resource_size_t align)
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{
	struct pcmcia_align_data *data = align_data;
	struct resource_map *m;
620
	resource_size_t start;
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622
	start = pcmcia_common_align(data, res, size, align);
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	for (m = data->map->next; m != data->map; m = m->next) {
		unsigned long start = m->base;
		unsigned long end = m->base + m->num - 1;

		/*
		 * If the lower resources are not available, try aligning
		 * to this entry of the resource database to see if it'll
		 * fit here.
		 */
		if (res->start < start) {
634
			start = pcmcia_common_align(data, res, size, align);
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		}

		/*
		 * If we're above the area which was passed in, there's
		 * no point proceeding.
		 */
		if (res->start >= res->end)
			break;

		if ((res->start + size - 1) <= end)
			break;
	}

	/*
	 * If we failed to find something suitable, ensure we fail.
	 */
	if (m == data->map)
652 653 654
		start = res->end;

	return start;
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}

/*
 * Adjust an existing IO region allocation, but making sure that we don't
 * encroach outside the resources which the user supplied.
 */
static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_start,
				      unsigned long r_end, struct pcmcia_socket *s)
{
	struct resource_map *m;
	struct socket_data *s_data = s->resource_data;
	int ret = -ENOMEM;

	for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) {
		unsigned long start = m->base;
		unsigned long end = m->base + m->num - 1;

		if (start > r_start || r_end > end)
			continue;

		ret = adjust_resource(res, r_start, r_end - r_start + 1);
		break;
	}

	return ret;
}

/*======================================================================

    These find ranges of I/O ports or memory addresses that are not
    currently allocated by other devices.

    The 'align' field should reflect the number of bits of address
    that need to be preserved from the initial value of *base.  It
    should be a power of two, greater than or equal to 'num'.  A value
    of 0 means that all bits of *base are significant.  *base should
    also be strictly less than 'align'.

======================================================================*/

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static struct resource *nonstatic_find_io_region(unsigned long base, int num,
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		   unsigned long align, struct pcmcia_socket *s)
{
698
	struct resource *res = make_resource(0, num, IORESOURCE_IO, dev_name(&s->dev));
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	struct socket_data *s_data = s->resource_data;
	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;
	data.map = &s_data->io_db;

#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;
}

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static struct resource *nonstatic_find_mem_region(u_long base, u_long num,
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		u_long align, int low, struct pcmcia_socket *s)
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{
730
	struct resource *res = make_resource(0, num, IORESOURCE_MEM, dev_name(&s->dev));
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	struct socket_data *s_data = s->resource_data;
	struct pcmcia_align_data data;
	unsigned long min, max;
734
	int ret, i, j;
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	low = low || !(s->features & SS_CAP_PAGE_REGS);

	data.mask = align - 1;
	data.offset = base & data.mask;

	for (i = 0; i < 2; i++) {
742
		data.map = &s_data->mem_db_valid;
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		if (low) {
			max = 0x100000UL;
			min = base < max ? base : 0;
		} else {
			max = ~0UL;
			min = 0x100000UL + base;
		}

751
		for (j = 0; j < 2; j++) {
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#ifdef CONFIG_PCI
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			if (s->cb_dev) {
				ret = pci_bus_alloc_resource(s->cb_dev->bus,
							res, num, 1, min, 0,
							pcmcia_align, &data);
			} else
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#endif
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			{
				ret = allocate_resource(&iomem_resource,
							res, num, min, max, 1,
							pcmcia_align, &data);
			}
			if (ret == 0)
				break;
			data.map = &s_data->mem_db;
		}
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		if (ret == 0 || low)
			break;
		low = 1;
	}

	if (ret != 0) {
		kfree(res);
		res = NULL;
	}
	return res;
}


781
static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
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{
	struct socket_data *data = s->resource_data;
784 785
	unsigned long size = end - start + 1;
	int ret = 0;
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787
	if (end < start)
788
		return -EINVAL;
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790
	switch (action) {
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	case ADD_MANAGED_RESOURCE:
792
		ret = add_interval(&data->mem_db, start, size);
793 794
		if (!ret)
			do_mem_probe(s, start, size, NULL, NULL);
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		break;
	case REMOVE_MANAGED_RESOURCE:
797
		ret = sub_interval(&data->mem_db, start, size);
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		break;
	default:
800
		ret = -EINVAL;
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	}

	return ret;
}


807
static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
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{
	struct socket_data *data = s->resource_data;
810 811
	unsigned long size = end - start + 1;
	int ret = 0;
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813
	if (end < start)
814 815 816 817
		return -EINVAL;

	if (end > IO_SPACE_LIMIT)
		return -EINVAL;
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819
	switch (action) {
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	case ADD_MANAGED_RESOURCE:
821 822
		if (add_interval(&data->io_db, start, size) != 0) {
			ret = -EBUSY;
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			break;
		}
#ifdef CONFIG_PCMCIA_PROBE
		if (probe_io)
827
			do_io_probe(s, start, size);
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#endif
		break;
	case REMOVE_MANAGED_RESOURCE:
831
		sub_interval(&data->io_db, start, size);
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		break;
	default:
834
		ret = -EINVAL;
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		break;
	}

	return ret;
}


842 843 844 845 846 847 848 849 850
#ifdef CONFIG_PCI
static int nonstatic_autoadd_resources(struct pcmcia_socket *s)
{
	struct resource *res;
	int i, done = 0;

	if (!s->cb_dev || !s->cb_dev->bus)
		return -ENODEV;

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#if defined(CONFIG_X86)
852 853 854 855 856 857 858 859 860 861
	/* If this is the root bus, the risk of hitting
	 * some strange system devices which aren't protected
	 * by either ACPI resource tables or properly requested
	 * resources is too big. Therefore, don't do auto-adding
	 * of resources at the moment.
	 */
	if (s->cb_dev->bus->number == 0)
		return -EINVAL;
#endif

862
	pci_bus_for_each_resource(s->cb_dev->bus, res, i) {
863 864 865 866 867 868
		if (!res)
			continue;

		if (res->flags & IORESOURCE_IO) {
			if (res == &ioport_resource)
				continue;
869 870 871 872 873
			dev_printk(KERN_INFO, &s->cb_dev->dev,
				   "pcmcia: parent PCI bridge I/O "
				   "window: 0x%llx - 0x%llx\n",
				   (unsigned long long)res->start,
				   (unsigned long long)res->end);
874 875 876 877 878 879 880 881
			if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end))
				done |= IORESOURCE_IO;

		}

		if (res->flags & IORESOURCE_MEM) {
			if (res == &iomem_resource)
				continue;
882 883 884 885 886
			dev_printk(KERN_INFO, &s->cb_dev->dev,
				   "pcmcia: parent PCI bridge Memory "
				   "window: 0x%llx - 0x%llx\n",
				   (unsigned long long)res->start,
				   (unsigned long long)res->end);
887 888 889 890 891 892 893
			if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end))
				done |= IORESOURCE_MEM;
		}
	}

	/* if we got at least one of IO, and one of MEM, we can be glad and
	 * activate the PCMCIA subsystem */
894
	if (done == (IORESOURCE_MEM | IORESOURCE_IO))
895 896 897 898 899 900 901 902 903 904 905 906 907 908 909
		s->resource_setup_done = 1;

	return 0;
}

#else

static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s)
{
	return -ENODEV;
}

#endif


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static int nonstatic_init(struct pcmcia_socket *s)
{
	struct socket_data *data;

914
	data = kzalloc(sizeof(struct socket_data), GFP_KERNEL);
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	if (!data)
		return -ENOMEM;

	data->mem_db.next = &data->mem_db;
919
	data->mem_db_valid.next = &data->mem_db_valid;
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	data->io_db.next = &data->io_db;

	s->resource_data = (void *) data;

924 925
	nonstatic_autoadd_resources(s);

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	return 0;
}

static void nonstatic_release_resource_db(struct pcmcia_socket *s)
{
	struct socket_data *data = s->resource_data;
	struct resource_map *p, *q;

934 935 936 937
	for (p = data->mem_db_valid.next; p != &data->mem_db_valid; p = q) {
		q = p->next;
		kfree(p);
	}
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	for (p = data->mem_db.next; p != &data->mem_db; p = q) {
		q = p->next;
		kfree(p);
	}
	for (p = data->io_db.next; p != &data->io_db; p = q) {
		q = p->next;
		kfree(p);
	}
}


struct pccard_resource_ops pccard_nonstatic_ops = {
	.validate_mem = pcmcia_nonstatic_validate_mem,
	.adjust_io_region = nonstatic_adjust_io_region,
	.find_io = nonstatic_find_io_region,
	.find_mem = nonstatic_find_mem_region,
954 955
	.add_io = adjust_io,
	.add_mem = adjust_memory,
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	.init = nonstatic_init,
	.exit = nonstatic_release_resource_db,
};
EXPORT_SYMBOL(pccard_nonstatic_ops);


/* sysfs interface to the resource database */

964 965
static ssize_t show_io_db(struct device *dev,
			  struct device_attribute *attr, char *buf)
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{
967
	struct pcmcia_socket *s = dev_get_drvdata(dev);
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	struct socket_data *data;
	struct resource_map *p;
	ssize_t ret = 0;

972
	mutex_lock(&s->ops_mutex);
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	data = s->resource_data;

	for (p = data->io_db.next; p != &data->io_db; p = p->next) {
		if (ret > (PAGE_SIZE - 10))
			continue;
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		ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
				"0x%08lx - 0x%08lx\n",
				((unsigned long) p->base),
				((unsigned long) p->base + p->num - 1));
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	}

984
	mutex_unlock(&s->ops_mutex);
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	return ret;
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}

988 989 990
static ssize_t store_io_db(struct device *dev,
			   struct device_attribute *attr,
			   const char *buf, size_t count)
L
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{
992
	struct pcmcia_socket *s = dev_get_drvdata(dev);
L
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	unsigned long start_addr, end_addr;
994
	unsigned int add = ADD_MANAGED_RESOURCE;
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	ssize_t ret = 0;

D
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	ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
L
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	if (ret != 2) {
D
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999
		ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
1000
		add = REMOVE_MANAGED_RESOURCE;
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		if (ret != 2) {
D
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			ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr,
				&end_addr);
1004
			add = ADD_MANAGED_RESOURCE;
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			if (ret != 2)
				return -EINVAL;
		}
	}
1009
	if (end_addr < start_addr)
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		return -EINVAL;

1012
	mutex_lock(&s->ops_mutex);
1013
	ret = adjust_io(s, add, start_addr, end_addr);
1014 1015
	if (!ret)
		s->resource_setup_new = 1;
1016
	mutex_unlock(&s->ops_mutex);
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	return ret ? ret : count;
}
1020
static DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db);
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1022 1023
static ssize_t show_mem_db(struct device *dev,
			   struct device_attribute *attr, char *buf)
L
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{
1025
	struct pcmcia_socket *s = dev_get_drvdata(dev);
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	struct socket_data *data;
	struct resource_map *p;
	ssize_t ret = 0;

1030
	mutex_lock(&s->ops_mutex);
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	data = s->resource_data;

1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
	for (p = data->mem_db_valid.next; p != &data->mem_db_valid;
	     p = p->next) {
		if (ret > (PAGE_SIZE - 10))
			continue;
		ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
				"0x%08lx - 0x%08lx\n",
				((unsigned long) p->base),
				((unsigned long) p->base + p->num - 1));
	}

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	for (p = data->mem_db.next; p != &data->mem_db; p = p->next) {
		if (ret > (PAGE_SIZE - 10))
			continue;
D
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		ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
				"0x%08lx - 0x%08lx\n",
				((unsigned long) p->base),
				((unsigned long) p->base + p->num - 1));
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	}

1052
	mutex_unlock(&s->ops_mutex);
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	return ret;
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}

1056 1057 1058
static ssize_t store_mem_db(struct device *dev,
			    struct device_attribute *attr,
			    const char *buf, size_t count)
L
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{
1060
	struct pcmcia_socket *s = dev_get_drvdata(dev);
L
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1061
	unsigned long start_addr, end_addr;
1062
	unsigned int add = ADD_MANAGED_RESOURCE;
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	ssize_t ret = 0;

D
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	ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
L
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	if (ret != 2) {
D
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		ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
1068
		add = REMOVE_MANAGED_RESOURCE;
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		if (ret != 2) {
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			ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr,
				&end_addr);
1072
			add = ADD_MANAGED_RESOURCE;
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			if (ret != 2)
				return -EINVAL;
		}
	}
1077
	if (end_addr < start_addr)
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		return -EINVAL;

1080
	mutex_lock(&s->ops_mutex);
1081
	ret = adjust_memory(s, add, start_addr, end_addr);
1082 1083
	if (!ret)
		s->resource_setup_new = 1;
1084
	mutex_unlock(&s->ops_mutex);
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	return ret ? ret : count;
}
1088
static DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db);
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1090 1091 1092
static struct attribute *pccard_rsrc_attributes[] = {
	&dev_attr_available_resources_io.attr,
	&dev_attr_available_resources_mem.attr,
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	NULL,
};

1096 1097 1098 1099
static const struct attribute_group rsrc_attributes = {
	.attrs = pccard_rsrc_attributes,
};

1100
static int __devinit pccard_sysfs_add_rsrc(struct device *dev,
1101
					   struct class_interface *class_intf)
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{
1103
	struct pcmcia_socket *s = dev_get_drvdata(dev);
1104

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	if (s->resource_ops != &pccard_nonstatic_ops)
		return 0;
1107
	return sysfs_create_group(&dev->kobj, &rsrc_attributes);
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}

1110
static void __devexit pccard_sysfs_remove_rsrc(struct device *dev,
1111
					       struct class_interface *class_intf)
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{
1113
	struct pcmcia_socket *s = dev_get_drvdata(dev);
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	if (s->resource_ops != &pccard_nonstatic_ops)
		return;
1117
	sysfs_remove_group(&dev->kobj, &rsrc_attributes);
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}

1120
static struct class_interface pccard_rsrc_interface __refdata = {
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	.class = &pcmcia_socket_class,
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	.add_dev = &pccard_sysfs_add_rsrc,
	.remove_dev = __devexit_p(&pccard_sysfs_remove_rsrc),
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};

static int __init nonstatic_sysfs_init(void)
{
	return class_interface_register(&pccard_rsrc_interface);
}

static void __exit nonstatic_sysfs_exit(void)
{
	class_interface_unregister(&pccard_rsrc_interface);
}

module_init(nonstatic_sysfs_init);
module_exit(nonstatic_sysfs_exit);