Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1240 insertions, 0 deletions

diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
new file mode 100644
index 0000000000..bf9d070a44
--- /dev/null
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -0,0 +1,1240 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * rsrc_nonstatic.c -- Resource management routines for !SS_CAP_STATIC_MAP sockets
+ *
+ * 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>
+#include <linux/io.h>
+
+#include <asm/irq.h>
+
+#include <pcmcia/ss.h>
+#include <pcmcia/cistpl.h>
+#include "cs_internal.h"
+
+/* moved to rsrc_mgr.c
+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;
+	struct resource_map		mem_db_valid;
+	struct resource_map		io_db;
+};
+
+#define MEM_PROBE_LOW	(1 << 0)
+#define MEM_PROBE_HIGH	(1 << 1)
+
+/* Action field */
+#define REMOVE_MANAGED_RESOURCE		1
+#define ADD_MANAGED_RESOURCE		2
+
+/*======================================================================
+
+    Linux resource management extensions
+
+======================================================================*/
+
+static struct resource *
+claim_region(struct pcmcia_socket *s, resource_size_t base,
+		resource_size_t size, int type, char *name)
+{
+	struct resource *res, *parent;
+
+	parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
+	res = pcmcia_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)
+{
+	struct resource_map *p, *q;
+
+	for (p = map; ; p = p->next) {
+		if ((p != map) && (p->base+p->num >= base)) {
+			p->num = max(num + base - p->base, p->num);
+			return 0;
+		}
+		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;
+}
+
+/*====================================================================*/
+
+static int sub_interval(struct resource_map *map, u_long base, u_long num)
+{
+	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;
+			}
+		}
+	}
+	return 0;
+}
+
+/*======================================================================
+
+    These routines examine a region of IO or memory addresses to
+    determine what ranges might be genuinely available.
+
+======================================================================*/
+
+#ifdef CONFIG_PCMCIA_PROBE
+static void do_io_probe(struct pcmcia_socket *s, unsigned int base,
+			unsigned int num)
+{
+	struct resource *res;
+	struct socket_data *s_data = s->resource_data;
+	unsigned int i, j, bad;
+	int any;
+	u_char *b, hole, most;
+
+	dev_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) {
+		pr_cont("\n");
+		dev_err(&s->dev, "do_io_probe: unable to kmalloc 256 bytes\n");
+		return;
+	}
+	for (i = base, most = 0; i < base+num; i += 8) {
+		res = claim_region(s, 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(s, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
+		if (!res) {
+			if (!any)
+				pr_cont(" excluding");
+			if (!bad)
+				bad = any = i;
+			continue;
+		}
+		for (j = 0; j < 8; j++)
+			if (inb(i+j) != most)
+				break;
+		free_region(res);
+		if (j < 8) {
+			if (!any)
+				pr_cont(" excluding");
+			if (!bad)
+				bad = any = i;
+		} else {
+			if (bad) {
+				sub_interval(&s_data->io_db, bad, i-bad);
+				pr_cont(" %#x-%#x", bad, i-1);
+				bad = 0;
+			}
+		}
+	}
+	if (bad) {
+		if ((num > 16) && (bad == base) && (i == base+num)) {
+			sub_interval(&s_data->io_db, bad, i-bad);
+			pr_cont(" nothing: probe failed.\n");
+			return;
+		} else {
+			sub_interval(&s_data->io_db, bad, i-bad);
+			pr_cont(" %#x-%#x", bad, i-1);
+		}
+	}
+
+	pr_cont("%s\n", !any ? " clean" : "");
+}
+#endif
+
+/*======================================================================*/
+
+/*
+ * readable() - iomem validation function for cards with a valid CIS
+ */
+static int readable(struct pcmcia_socket *s, struct resource *res,
+		    unsigned int *count)
+{
+	int ret = -EINVAL;
+
+	if (s->fake_cis) {
+		dev_dbg(&s->dev, "fake CIS is being used: can't validate mem\n");
+		return 0;
+	}
+
+	s->cis_mem.res = res;
+	s->cis_virt = ioremap(res->start, s->map_size);
+	if (s->cis_virt) {
+		mutex_unlock(&s->ops_mutex);
+		/* as we're only called from pcmcia.c, we're safe */
+		if (s->callback->validate)
+			ret = s->callback->validate(s, count);
+		/* invalidate mapping */
+		mutex_lock(&s->ops_mutex);
+		iounmap(s->cis_virt);
+		s->cis_virt = NULL;
+	}
+	s->cis_mem.res = NULL;
+	if ((ret) || (*count == 0))
+		return -EINVAL;
+	return 0;
+}
+
+/*
+ * checksum() - iomem validation function for simple memory cards
+ */
+static int checksum(struct pcmcia_socket *s, struct resource *res,
+		    unsigned int *value)
+{
+	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);
+	}
+
+	if (b == -1)
+		return -EINVAL;
+
+	*value = a;
+
+	return 0;
+}
+
+/**
+ * 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))
+{
+	struct socket_data *s_data = s->resource_data;
+	struct resource *res1, *res2;
+	unsigned int info1 = 1, info2 = 1;
+	int ret = -EINVAL;
+
+	res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe");
+	res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM,
+			"PCMCIA memprobe");
+
+	if (res1 && res2) {
+		ret = 0;
+		if (validate) {
+			ret = validate(s, res1, &info1);
+			ret += validate(s, res2, &info2);
+		}
+	}
+
+	dev_dbg(&s->dev, "cs: memory probe 0x%06lx-0x%06lx: %pr %pr %u %u %u",
+		base, base+size-1, res1, res2, ret, info1, info2);
+
+	free_region(res2);
+	free_region(res1);
+
+	if ((ret) || (info1 != info2) || (info1 == 0))
+		return -EINVAL;
+
+	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);
+	}
+
+	return 0;
+}
+
+
+/**
+ * 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 unavailable 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))
+{
+	struct socket_data *s_data = s->resource_data;
+	u_long i, j, bad, fail, step;
+
+	dev_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) {
+				if (!do_validate_mem(s, j, step, validate))
+					break;
+			}
+			fail = ((i == base) && (j == base+num));
+		}
+		if ((fail) && (fallback)) {
+			for (j = i; j < base+num; j += step)
+				if (!do_validate_mem(s, j, step, fallback))
+					break;
+		}
+		if (i != j) {
+			if (!bad)
+				pr_cont(" excluding");
+			pr_cont(" %#05lx-%#05lx", i, j-1);
+			sub_interval(&s_data->mem_db, i, j-i);
+			bad += j-i;
+		}
+	}
+	pr_cont("%s\n", !bad ? " clean" : "");
+	return num - bad;
+}
+
+
+#ifdef CONFIG_PCMCIA_PROBE
+
+/**
+ * inv_probe() - top-to-bottom search for one usuable high memory area
+ * @s:		PCMCIA socket to validate
+ * @m:		resource_map to check
+ */
+static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s)
+{
+	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;
+	return do_mem_probe(s, m->base, m->num, readable, checksum);
+}
+
+/**
+ * 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.
+ */
+static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
+{
+	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;
+
+	/* 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;
+		if (s_data->mem_db_valid.next != &s_data->mem_db_valid)
+			return 0;
+		dev_notice(&s->dev,
+			   "cs: warning: no high memory space available!\n");
+		return -ENODEV;
+	}
+
+	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) {
+			ok += do_mem_probe(s, mm.base, mm.num, readable,
+					   checksum);
+			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
+					ok += do_mem_probe(s, b, 0x10000,
+							   readable, checksum);
+			}
+		}
+	}
+
+	if (ok > 0)
+		return 0;
+
+	return -ENODEV;
+}
+
+#else /* CONFIG_PCMCIA_PROBE */
+
+/**
+ * validate_mem() - memory probe function
+ * @s:		PCMCIA socket to validate
+ * @probe_mask: ignored
+ *
+ * Returns 0 on usuable ports.
+ */
+static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
+{
+	struct resource_map *m, mm;
+	struct socket_data *s_data = s->resource_data;
+	unsigned long ok = 0;
+
+	for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
+		mm = *m;
+		ok += do_mem_probe(s, mm.base, mm.num, readable, checksum);
+	}
+	if (ok > 0)
+		return 0;
+	return -ENODEV;
+}
+
+#endif /* CONFIG_PCMCIA_PROBE */
+
+
+/**
+ * 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.
+ *
+ * Locking note: Must be called with skt_mutex held!
+ */
+static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
+{
+	struct socket_data *s_data = s->resource_data;
+	unsigned int probe_mask = MEM_PROBE_LOW;
+	int ret;
+
+	if (!probe_mem || !(s->state & SOCKET_PRESENT))
+		return 0;
+
+	if (s->features & SS_CAP_PAGE_REGS)
+		probe_mask = MEM_PROBE_HIGH;
+
+	ret = validate_mem(s, probe_mask);
+
+	if (s_data->mem_db_valid.next != &s_data->mem_db_valid)
+		return 0;
+
+	return ret;
+}
+
+struct pcmcia_align_data {
+	unsigned long	mask;
+	unsigned long	offset;
+	struct resource_map	*map;
+};
+
+static resource_size_t pcmcia_common_align(struct pcmcia_align_data *align_data,
+					resource_size_t start)
+{
+	resource_size_t ret;
+	/*
+	 * Ensure that we have the correct start address
+	 */
+	ret = (start & ~align_data->mask) + align_data->offset;
+	if (ret < start)
+		ret += align_data->mask + 1;
+	return ret;
+}
+
+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;
+	struct resource_map *m;
+	resource_size_t start;
+
+	start = pcmcia_common_align(data, res->start);
+
+	for (m = data->map->next; m != data->map; m = m->next) {
+		unsigned long map_start = m->base;
+		unsigned long map_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 (start < map_start)
+			start = pcmcia_common_align(data, map_start);
+
+		/*
+		 * If we're above the area which was passed in, there's
+		 * no point proceeding.
+		 */
+		if (start >= res->end)
+			break;
+
+		if ((start + size - 1) <= map_end)
+			break;
+	}
+
+	/*
+	 * If we failed to find something suitable, ensure we fail.
+	 */
+	if (m == data->map)
+		start = res->end;
+
+	return start;
+}
+
+/*
+ * 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 pcmcia_socket *s,
+					unsigned long r_start,
+					unsigned long r_end)
+{
+	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 = 0;
+	}
+
+	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'.
+
+======================================================================*/
+
+static struct resource *__nonstatic_find_io_region(struct pcmcia_socket *s,
+						unsigned long base, int num,
+						unsigned long align)
+{
+	struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
+						dev_name(&s->dev));
+	struct socket_data *s_data = s->resource_data;
+	struct pcmcia_align_data data;
+	unsigned long min = base;
+	int ret;
+
+	if (!res)
+		return NULL;
+
+	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;
+}
+
+static int nonstatic_find_io(struct pcmcia_socket *s, unsigned int attr,
+			unsigned int *base, unsigned int num,
+			unsigned int align, struct resource **parent)
+{
+	int i, ret = 0;
+
+	/* Check for an already-allocated window that must conflict with
+	 * what was asked for.  It is a hack because it does not catch all
+	 * potential conflicts, just the most obvious ones.
+	 */
+	for (i = 0; i < MAX_IO_WIN; i++) {
+		if (!s->io[i].res)
+			continue;
+
+		if (!*base)
+			continue;
+
+		if ((s->io[i].res->start & (align-1)) == *base)
+			return -EBUSY;
+	}
+
+	for (i = 0; i < MAX_IO_WIN; i++) {
+		struct resource *res = s->io[i].res;
+		unsigned int try;
+
+		if (res && (res->flags & IORESOURCE_BITS) !=
+			(attr & IORESOURCE_BITS))
+			continue;
+
+		if (!res) {
+			if (align == 0)
+				align = 0x10000;
+
+			res = s->io[i].res = __nonstatic_find_io_region(s,
+								*base, num,
+								align);
+			if (!res)
+				return -EINVAL;
+
+			*base = res->start;
+			s->io[i].res->flags =
+				((res->flags & ~IORESOURCE_BITS) |
+					(attr & IORESOURCE_BITS));
+			s->io[i].InUse = num;
+			*parent = res;
+			return 0;
+		}
+
+		/* Try to extend top of window */
+		try = res->end + 1;
+		if ((*base == 0) || (*base == try)) {
+			ret =  __nonstatic_adjust_io_region(s, res->start,
+							res->end + num);
+			if (!ret) {
+				ret = adjust_resource(s->io[i].res, res->start,
+						      resource_size(res) + num);
+				if (ret)
+					continue;
+				*base = try;
+				s->io[i].InUse += num;
+				*parent = res;
+				return 0;
+			}
+		}
+
+		/* Try to extend bottom of window */
+		try = res->start - num;
+		if ((*base == 0) || (*base == try)) {
+			ret =  __nonstatic_adjust_io_region(s,
+							res->start - num,
+							res->end);
+			if (!ret) {
+				ret = adjust_resource(s->io[i].res,
+						      res->start - num,
+						      resource_size(res) + num);
+				if (ret)
+					continue;
+				*base = try;
+				s->io[i].InUse += num;
+				*parent = res;
+				return 0;
+			}
+		}
+	}
+
+	return -EINVAL;
+}
+
+
+static struct resource *nonstatic_find_mem_region(u_long base, u_long num,
+		u_long align, int low, struct pcmcia_socket *s)
+{
+	struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_MEM,
+						dev_name(&s->dev));
+	struct socket_data *s_data = s->resource_data;
+	struct pcmcia_align_data data;
+	unsigned long min, max;
+	int ret, i, j;
+
+	if (!res)
+		return NULL;
+
+	low = low || !(s->features & SS_CAP_PAGE_REGS);
+
+	data.mask = align - 1;
+	data.offset = base & data.mask;
+
+	for (i = 0; i < 2; i++) {
+		data.map = &s_data->mem_db_valid;
+		if (low) {
+			max = 0x100000UL;
+			min = base < max ? base : 0;
+		} else {
+			max = ~0UL;
+			min = 0x100000UL + base;
+		}
+
+		for (j = 0; j < 2; j++) {
+#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(&iomem_resource,
+							res, num, min, max, 1,
+							pcmcia_align, &data);
+			}
+			if (ret == 0)
+				break;
+			data.map = &s_data->mem_db;
+		}
+		if (ret == 0 || low)
+			break;
+		low = 1;
+	}
+
+	if (ret != 0) {
+		kfree(res);
+		res = NULL;
+	}
+	return res;
+}
+
+
+static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
+{
+	struct socket_data *data = s->resource_data;
+	unsigned long size = end - start + 1;
+	int ret = 0;
+
+	if (end < start)
+		return -EINVAL;
+
+	switch (action) {
+	case ADD_MANAGED_RESOURCE:
+		ret = add_interval(&data->mem_db, start, size);
+		if (!ret)
+			do_mem_probe(s, start, size, NULL, NULL);
+		break;
+	case REMOVE_MANAGED_RESOURCE:
+		ret = sub_interval(&data->mem_db, start, size);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+
+static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
+{
+	struct socket_data *data = s->resource_data;
+	unsigned long size;
+	int ret = 0;
+
+#if defined(CONFIG_X86)
+	/* on x86, avoid anything < 0x100 for it is often used for
+	 * legacy platform devices */
+	if (start < 0x100)
+		start = 0x100;
+#endif
+
+	size = end - start + 1;
+
+	if (end < start)
+		return -EINVAL;
+
+	if (end > IO_SPACE_LIMIT)
+		return -EINVAL;
+
+	switch (action) {
+	case ADD_MANAGED_RESOURCE:
+		if (add_interval(&data->io_db, start, size) != 0) {
+			ret = -EBUSY;
+			break;
+		}
+#ifdef CONFIG_PCMCIA_PROBE
+		if (probe_io)
+			do_io_probe(s, start, size);
+#endif
+		break;
+	case REMOVE_MANAGED_RESOURCE:
+		sub_interval(&data->io_db, start, size);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+
+#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;
+
+#if defined(CONFIG_X86)
+	/* If this is the root bus, the risk of hitting some strange
+	 * system devices is too high: If a driver isn't loaded, the
+	 * resources are not claimed; even if a driver is loaded, it
+	 * may not request all resources or even the wrong one. We
+	 * can neither trust the rest of the kernel nor ACPI/PNP and
+	 * CRS parsing to get it right. Therefore, use several
+	 * safeguards:
+	 *
+	 * - Do not auto-add resources if the CardBus bridge is on
+	 *   the PCI root bus
+	 *
+	 * - Avoid any I/O ports < 0x100.
+	 *
+	 * - On PCI-PCI bridges, only use resources which are set up
+	 *   exclusively for the secondary PCI bus: the risk of hitting
+	 *   system devices is quite low, as they usually aren't
+	 *   connected to the secondary PCI bus.
+	 */
+	if (s->cb_dev->bus->number == 0)
+		return -EINVAL;
+
+	for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) {
+		res = s->cb_dev->bus->resource[i];
+#else
+	pci_bus_for_each_resource(s->cb_dev->bus, res, i) {
+#endif
+		if (!res)
+			continue;
+
+		if (res->flags & IORESOURCE_IO) {
+			/* safeguard against the root resource, where the
+			 * risk of hitting any other device would be too
+			 * high */
+			if (res == &ioport_resource)
+				continue;
+
+			dev_info(&s->cb_dev->dev,
+				 "pcmcia: parent PCI bridge window: %pR\n",
+				 res);
+			if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end))
+				done |= IORESOURCE_IO;
+
+		}
+
+		if (res->flags & IORESOURCE_MEM) {
+			/* safeguard against the root resource, where the
+			 * risk of hitting any other device would be too
+			 * high */
+			if (res == &iomem_resource)
+				continue;
+
+			dev_info(&s->cb_dev->dev,
+				 "pcmcia: parent PCI bridge window: %pR\n",
+				 res);
+			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 */
+	if (done == (IORESOURCE_MEM | IORESOURCE_IO))
+		s->resource_setup_done = 1;
+
+	return 0;
+}
+
+#else
+
+static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s)
+{
+	return -ENODEV;
+}
+
+#endif
+
+
+static int nonstatic_init(struct pcmcia_socket *s)
+{
+	struct socket_data *data;
+
+	data = kzalloc(sizeof(struct socket_data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->mem_db.next = &data->mem_db;
+	data->mem_db_valid.next = &data->mem_db_valid;
+	data->io_db.next = &data->io_db;
+
+	s->resource_data = (void *) data;
+
+	nonstatic_autoadd_resources(s);
+
+	return 0;
+}
+
+static void nonstatic_release_resource_db(struct pcmcia_socket *s)
+{
+	struct socket_data *data = s->resource_data;
+	struct resource_map *p, *q;
+
+	for (p = data->mem_db_valid.next; p != &data->mem_db_valid; p = q) {
+		q = p->next;
+		kfree(p);
+	}
+	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);
+	}
+
+	kfree(data);
+}
+
+
+struct pccard_resource_ops pccard_nonstatic_ops = {
+	.validate_mem = pcmcia_nonstatic_validate_mem,
+	.find_io = nonstatic_find_io,
+	.find_mem = nonstatic_find_mem_region,
+	.init = nonstatic_init,
+	.exit = nonstatic_release_resource_db,
+};
+EXPORT_SYMBOL(pccard_nonstatic_ops);
+
+
+/* sysfs interface to the resource database */
+
+static ssize_t show_io_db(struct device *dev,
+			  struct device_attribute *attr, char *buf)
+{
+	struct pcmcia_socket *s = dev_get_drvdata(dev);
+	struct socket_data *data;
+	struct resource_map *p;
+	ssize_t ret = 0;
+
+	mutex_lock(&s->ops_mutex);
+	data = s->resource_data;
+
+	for (p = data->io_db.next; p != &data->io_db; p = p->next) {
+		if (ret > (PAGE_SIZE - 10))
+			continue;
+		ret += sysfs_emit_at(buf, ret,
+				"0x%08lx - 0x%08lx\n",
+				((unsigned long) p->base),
+				((unsigned long) p->base + p->num - 1));
+	}
+
+	mutex_unlock(&s->ops_mutex);
+	return ret;
+}
+
+static ssize_t store_io_db(struct device *dev,
+			   struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct pcmcia_socket *s = dev_get_drvdata(dev);
+	unsigned long start_addr, end_addr;
+	unsigned int add = ADD_MANAGED_RESOURCE;
+	ssize_t ret = 0;
+
+	ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
+	if (ret != 2) {
+		ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
+		add = REMOVE_MANAGED_RESOURCE;
+		if (ret != 2) {
+			ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr,
+				&end_addr);
+			add = ADD_MANAGED_RESOURCE;
+			if (ret != 2)
+				return -EINVAL;
+		}
+	}
+	if (end_addr < start_addr)
+		return -EINVAL;
+
+	mutex_lock(&s->ops_mutex);
+	ret = adjust_io(s, add, start_addr, end_addr);
+	mutex_unlock(&s->ops_mutex);
+
+	return ret ? ret : count;
+}
+static DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db);
+
+static ssize_t show_mem_db(struct device *dev,
+			   struct device_attribute *attr, char *buf)
+{
+	struct pcmcia_socket *s = dev_get_drvdata(dev);
+	struct socket_data *data;
+	struct resource_map *p;
+	ssize_t ret = 0;
+
+	mutex_lock(&s->ops_mutex);
+	data = s->resource_data;
+
+	for (p = data->mem_db_valid.next; p != &data->mem_db_valid;
+	     p = p->next) {
+		if (ret > (PAGE_SIZE - 10))
+			continue;
+		ret += sysfs_emit_at(buf, ret,
+				"0x%08lx - 0x%08lx\n",
+				((unsigned long) p->base),
+				((unsigned long) p->base + p->num - 1));
+	}
+
+	for (p = data->mem_db.next; p != &data->mem_db; p = p->next) {
+		if (ret > (PAGE_SIZE - 10))
+			continue;
+		ret += sysfs_emit_at(buf, ret,
+				"0x%08lx - 0x%08lx\n",
+				((unsigned long) p->base),
+				((unsigned long) p->base + p->num - 1));
+	}
+
+	mutex_unlock(&s->ops_mutex);
+	return ret;
+}
+
+static ssize_t store_mem_db(struct device *dev,
+			    struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	struct pcmcia_socket *s = dev_get_drvdata(dev);
+	unsigned long start_addr, end_addr;
+	unsigned int add = ADD_MANAGED_RESOURCE;
+	ssize_t ret = 0;
+
+	ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
+	if (ret != 2) {
+		ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
+		add = REMOVE_MANAGED_RESOURCE;
+		if (ret != 2) {
+			ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr,
+				&end_addr);
+			add = ADD_MANAGED_RESOURCE;
+			if (ret != 2)
+				return -EINVAL;
+		}
+	}
+	if (end_addr < start_addr)
+		return -EINVAL;
+
+	mutex_lock(&s->ops_mutex);
+	ret = adjust_memory(s, add, start_addr, end_addr);
+	mutex_unlock(&s->ops_mutex);
+
+	return ret ? ret : count;
+}
+static DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db);
+
+static struct attribute *pccard_rsrc_attributes[] = {
+	&dev_attr_available_resources_io.attr,
+	&dev_attr_available_resources_mem.attr,
+	NULL,
+};
+
+static const struct attribute_group rsrc_attributes = {
+	.attrs = pccard_rsrc_attributes,
+};
+
+static int pccard_sysfs_add_rsrc(struct device *dev)
+{
+	struct pcmcia_socket *s = dev_get_drvdata(dev);
+
+	if (s->resource_ops != &pccard_nonstatic_ops)
+		return 0;
+	return sysfs_create_group(&dev->kobj, &rsrc_attributes);
+}
+
+static void pccard_sysfs_remove_rsrc(struct device *dev)
+{
+	struct pcmcia_socket *s = dev_get_drvdata(dev);
+
+	if (s->resource_ops != &pccard_nonstatic_ops)
+		return;
+	sysfs_remove_group(&dev->kobj, &rsrc_attributes);
+}
+
+static struct class_interface pccard_rsrc_interface __refdata = {
+	.class = &pcmcia_socket_class,
+	.add_dev = &pccard_sysfs_add_rsrc,
+	.remove_dev = &pccard_sysfs_remove_rsrc,
+};
+
+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);