v4.19.13 snapshot.
diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
new file mode 100644
index 0000000..49377d5
--- /dev/null
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -0,0 +1,1237 @@
+/*
+ * 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>
+#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 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))
+{
+ 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;
+
+ 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;
+
+ 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);
+ }
+}
+
+
+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 += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
+ "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 += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
+ "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 += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
+ "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 class_interface *class_intf)
+{
+ 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 class_interface *class_intf)
+{
+ 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);