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Commit be1f106c authored by Dominik Brodowski's avatar Dominik Brodowski Committed by Linus Torvalds
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[PATCH] pcmcia: move resource handling code only for non-statically mapped sockets to other file 

Move all the "nonstatic" code to a new file, and link it into pcmcia_core.ko
Signed-off-by: default avatarDominik Brodowski <linux@brodo.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 83b52fe6
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Showing with 772 additions and 754 deletions
drivers/pcmcia/Makefile
View file @ be1f106c
...@@ -6,7 +6,7 @@ ifeq ($(CONFIG_PCMCIA_DEBUG),y) ...@@ -6,7 +6,7 @@ ifeq ($(CONFIG_PCMCIA_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG EXTRA_CFLAGS += -DDEBUG
endif endif
pcmcia_core-y += cs.o cistpl.o rsrc_mgr.o socket_sysfs.o pcmcia_core-y += cs.o cistpl.o rsrc_mgr.o socket_sysfs.o rsrc_nonstatic.o
pcmcia_core-$(CONFIG_CARDBUS) += cardbus.o pcmcia_core-$(CONFIG_CARDBUS) += cardbus.o
obj-$(CONFIG_PCCARD) += pcmcia_core.o obj-$(CONFIG_PCCARD) += pcmcia_core.o
......
drivers/pcmcia/rsrc_mgr.c
View file @ be1f106c
...@@ -34,32 +34,8 @@ ...@@ -34,32 +34,8 @@
#include <pcmcia/cistpl.h> #include <pcmcia/cistpl.h>
#include "cs_internal.h" #include "cs_internal.h"
/*====================================================================*/
/* 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
/*======================================================================
The resource_map_t structures are used to track what resources are
available for allocation for PC Card devices.
======================================================================*/
typedef struct resource_map_t resource_map_t;
static DECLARE_MUTEX(rsrc_sem); static DECLARE_MUTEX(rsrc_sem);
#define MEM_PROBE_LOW (1 << 0)
#define MEM_PROBE_HIGH (1 << 1)
#ifdef CONFIG_PCMCIA_PROBE #ifdef CONFIG_PCMCIA_PROBE
typedef struct irq_info_t { typedef struct irq_info_t {
...@@ -73,616 +49,6 @@ static irq_info_t irq_table[NR_IRQS]; ...@@ -73,616 +49,6 @@ static irq_info_t irq_table[NR_IRQS];
#endif #endif
/*======================================================================
Linux resource management extensions
======================================================================*/
static struct resource *
make_resource(unsigned long b, unsigned long n, int flags, char *name)
{
struct resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
if (res) {
memset(res, 0, sizeof(*res));
res->name = name;
res->start = b;
res->end = b + n - 1;
res->flags = flags;
}
return res;
}
static struct resource *
claim_region(struct pcmcia_socket *s, unsigned long base, unsigned long size,
int type, char *name)
{
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(resource_map_t *map, u_long base, u_long num)
{
resource_map_t *p, *q;
for (p = map; ; p = p->next) {
if ((p != map) && (p->base+p->num-1 >= base))
return -1;
if ((p->next == map) || (p->next->base > base+num-1))
break;
}
q = kmalloc(sizeof(resource_map_t), GFP_KERNEL);
if (!q) return CS_OUT_OF_RESOURCE;
q->base = base; q->num = num;
q->next = p->next; p->next = q;
return CS_SUCCESS;
}
/*====================================================================*/
static int sub_interval(resource_map_t *map, u_long base, u_long num)
{
resource_map_t *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(resource_map_t), GFP_KERNEL);
if (!p) return CS_OUT_OF_RESOURCE;
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 CS_SUCCESS;
}
/*======================================================================
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, ioaddr_t base, ioaddr_t num)
{
struct resource *res;
ioaddr_t i, j, bad, any;
u_char *b, hole, most;
printk(KERN_INFO "cs: IO port probe 0x%04x-0x%04x:",
base, base+num-1);
/* First, what does a floating port look like? */
b = kmalloc(256, GFP_KERNEL);
if (!b) {
printk(KERN_ERR "do_io_probe: unable to kmalloc 256 bytes");
return;
}
memset(b, 0, 256);
for (i = base, most = 0; i < base+num; i += 8) {
res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA IO probe");
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 IO probe");
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->io_db, bad, i-bad);
printk(" %#04x-%#04x", 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->io_db, bad, i-bad);
printk(" %#04x-%#04x", bad, i-1);
}
}
printk(any ? "\n" : " clean.\n");
}
#endif
/*======================================================================
This is tricky... when we set up CIS memory, we try to validate
the memory window space allocations.
======================================================================*/
/* Validation function for cards with a valid CIS */
static int readable(struct pcmcia_socket *s, struct resource *res, cisinfo_t *info)
{
int ret = -1;
s->cis_mem.res = res;
s->cis_virt = ioremap(res->start, s->map_size);
if (s->cis_virt) {
ret = pccard_validate_cis(s, BIND_FN_ALL, info);
/* invalidate mapping and CIS cache */
iounmap(s->cis_virt);
s->cis_virt = NULL;
destroy_cis_cache(s);
}
s->cis_mem.res = NULL;
if ((ret != 0) || (info->Chains == 0))
return 0;
return 1;
}
/* Validation function for simple memory cards */
static int checksum(struct pcmcia_socket *s, struct resource *res)
{
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);
}
return (b == -1) ? -1 : (a>>1);
}
static int
cis_readable(struct pcmcia_socket *s, unsigned long base, unsigned long size)
{
struct resource *res1, *res2;
cisinfo_t info1, info2;
int ret = 0;
res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
if (res1 && res2) {
ret = readable(s, res1, &info1);
ret += readable(s, res2, &info2);
}
free_region(res2);
free_region(res1);
return (ret == 2) && (info1.Chains == info2.Chains);
}
static int
checksum_match(struct pcmcia_socket *s, unsigned long base, unsigned long size)
{
struct resource *res1, *res2;
int a = -1, b = -1;
res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
if (res1 && res2) {
a = checksum(s, res1);
b = checksum(s, res2);
}
free_region(res2);
free_region(res1);
return (a == b) && (a >= 0);
}
/*======================================================================
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.
======================================================================*/
static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s)
{
u_long i, j, bad, fail, step;
printk(KERN_INFO "cs: memory probe 0x%06lx-0x%06lx:",
base, base+num-1);
bad = fail = 0;
step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
/* 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 (cis_readable(s, j, step))
break;
}
fail = ((i == base) && (j == base+num));
}
if (fail) {
for (j = i; j < base+num; j += 2*step)
if (checksum_match(s, j, step) &&
checksum_match(s, j + step, step))
break;
}
if (i != j) {
if (!bad) printk(" excluding");
printk(" %#05lx-%#05lx", i, j-1);
sub_interval(&s->mem_db, i, j-i);
bad += j-i;
}
}
printk(bad ? "\n" : " clean.\n");
return (num - bad);
}
#ifdef CONFIG_PCMCIA_PROBE
static u_long inv_probe(resource_map_t *m, struct pcmcia_socket *s)
{
u_long ok;
if (m == &s->mem_db)
return 0;
ok = inv_probe(m->next, s);
if (ok) {
if (m->base >= 0x100000)
sub_interval(&s->mem_db, m->base, m->num);
return ok;
}
if (m->base < 0x100000)
return 0;
return do_mem_probe(m->base, m->num, s);
}
static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
{
resource_map_t *m, mm;
static u_char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
u_long b, i, ok = 0;
/* We do up to four passes through the list */
if (probe_mask & MEM_PROBE_HIGH) {
if (inv_probe(s->mem_db.next, s) > 0)
return;
printk(KERN_NOTICE "cs: warning: no high memory space "
"available!\n");
}
if ((probe_mask & MEM_PROBE_LOW) == 0)
return;
for (m = s->mem_db.next; m != &s->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(mm.base, mm.num, s);
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->mem_db, b, 0x10000);
else
ok += do_mem_probe(b, 0x10000, s);
}
}
}
}
#else /* CONFIG_PCMCIA_PROBE */
static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
{
resource_map_t *m, mm;
for (m = s->mem_db.next; m != &s->mem_db; m = mm.next) {
mm = *m;
if (do_mem_probe(mm.base, mm.num, s))
break;
}
}
#endif /* CONFIG_PCMCIA_PROBE */
/*
* Locking note: this is the only place where we take
* both rsrc_sem and skt_sem.
*/
static void pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
{
if (probe_mem) {
unsigned int probe_mask;
down(&rsrc_sem);
probe_mask = MEM_PROBE_LOW;
if (s->features & SS_CAP_PAGE_REGS)
probe_mask = MEM_PROBE_HIGH;
if (probe_mask & ~s->rsrc_mem_probe) {
s->rsrc_mem_probe |= probe_mask;
down(&s->skt_sem);
if (s->state & SOCKET_PRESENT)
validate_mem(s, probe_mask);
up(&s->skt_sem);
}
up(&rsrc_sem);
}
}
struct pcmcia_align_data {
unsigned long mask;
unsigned long offset;
resource_map_t *map;
};
static void
pcmcia_common_align(void *align_data, struct resource *res,
unsigned long size, unsigned long align)
{
struct pcmcia_align_data *data = align_data;
unsigned long start;
/*
* Ensure that we have the correct start address
*/
start = (res->start & ~data->mask) + data->offset;
if (start < res->start)
start += data->mask + 1;
res->start = start;
}
static void
pcmcia_align(void *align_data, struct resource *res,
unsigned long size, unsigned long align)
{
struct pcmcia_align_data *data = align_data;
resource_map_t *m;
pcmcia_common_align(data, res, size, align);
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) {
res->start = start;
pcmcia_common_align(data, res, size, align);
}
/*
* 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)
res->start = res->end;
}
/*
* 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)
{
resource_map_t *m;
int ret = -ENOMEM;
down(&rsrc_sem);
for (m = s->io_db.next; m != &s->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;
}
up(&rsrc_sem);
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'.
======================================================================*/
struct resource *nonstatic_find_io_region(unsigned long base, int num,
unsigned long align, struct pcmcia_socket *s)
{
struct resource *res = make_resource(0, num, IORESOURCE_IO, s->dev.class_id);
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->io_db;
down(&rsrc_sem);
#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);
up(&rsrc_sem);
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
struct resource * nonstatic_find_mem_region(u_long base, u_long num, u_long align,
int low, struct pcmcia_socket *s)
{
struct resource *res = make_resource(0, num, IORESOURCE_MEM, s->dev.class_id);
struct pcmcia_align_data data;
unsigned long min, max;
int ret, i;
low = low || !(s->features & SS_CAP_PAGE_REGS);
data.mask = align - 1;
data.offset = base & data.mask;
data.map = &s->mem_db;
for (i = 0; i < 2; i++) {
if (low) {
max = 0x100000UL;
min = base < max ? base : 0;
} else {
max = ~0UL;
min = 0x100000UL + base;
}
down(&rsrc_sem);
#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);
up(&rsrc_sem);
if (ret == 0 || low)
break;
low = 1;
}
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
/*====================================================================== /*======================================================================
...@@ -809,85 +175,6 @@ void undo_irq(u_int Attributes, int irq) ...@@ -809,85 +175,6 @@ void undo_irq(u_int Attributes, int irq)
#endif #endif
/*======================================================================
The various adjust_* calls form the external interface to the
resource database.
======================================================================*/
static int adjust_memory(struct pcmcia_socket *s, adjust_t *adj)
{
u_long base, num;
int ret;
base = adj->resource.memory.Base;
num = adj->resource.memory.Size;
if ((num == 0) || (base+num-1 < base))
return CS_BAD_SIZE;
ret = CS_SUCCESS;
down(&rsrc_sem);
switch (adj->Action) {
case ADD_MANAGED_RESOURCE:
ret = add_interval(&s->mem_db, base, num);
break;
case REMOVE_MANAGED_RESOURCE:
ret = sub_interval(&s->mem_db, base, num);
if (ret == CS_SUCCESS) {
struct pcmcia_socket *socket;
down_read(&pcmcia_socket_list_rwsem);
list_for_each_entry(socket, &pcmcia_socket_list, socket_list)
release_cis_mem(socket);
up_read(&pcmcia_socket_list_rwsem);
}
break;
default:
ret = CS_UNSUPPORTED_FUNCTION;
}
up(&rsrc_sem);
return ret;
}
/*====================================================================*/
static int adjust_io(struct pcmcia_socket *s, adjust_t *adj)
{
int base, num, ret = CS_SUCCESS;
base = adj->resource.io.BasePort;
num = adj->resource.io.NumPorts;
if ((base < 0) || (base > 0xffff))
return CS_BAD_BASE;
if ((num <= 0) || (base+num > 0x10000) || (base+num <= base))
return CS_BAD_SIZE;
down(&rsrc_sem);
switch (adj->Action) {
case ADD_MANAGED_RESOURCE:
if (add_interval(&s->io_db, base, num) != 0) {
ret = CS_IN_USE;
break;
}
#ifdef CONFIG_PCMCIA_PROBE
if (probe_io)
do_io_probe(s, base, num);
#endif
break;
case REMOVE_MANAGED_RESOURCE:
sub_interval(&s->io_db, base, num);
break;
default:
ret = CS_UNSUPPORTED_FUNCTION;
break;
}
up(&rsrc_sem);
return ret;
}
/*====================================================================*/ /*====================================================================*/
static int adjust_irq(adjust_t *adj) static int adjust_irq(adjust_t *adj)
...@@ -938,19 +225,6 @@ static int adjust_irq(adjust_t *adj) ...@@ -938,19 +225,6 @@ static int adjust_irq(adjust_t *adj)
return ret; return ret;
} }
/*====================================================================*/
static int nonstatic_adjust_resource_info(struct pcmcia_socket *s, adjust_t *adj)
{
switch (adj->Resource) {
case RES_MEMORY_RANGE:
return adjust_memory(s, adj);
case RES_IO_RANGE:
return adjust_io(s, adj);
}
return CS_UNSUPPORTED_FUNCTION;
}
int pcmcia_adjust_resource_info(adjust_t *adj) int pcmcia_adjust_resource_info(adjust_t *adj)
{ {
struct pcmcia_socket *s; struct pcmcia_socket *s;
...@@ -970,24 +244,6 @@ int pcmcia_adjust_resource_info(adjust_t *adj) ...@@ -970,24 +244,6 @@ int pcmcia_adjust_resource_info(adjust_t *adj)
} }
EXPORT_SYMBOL(pcmcia_adjust_resource_info); EXPORT_SYMBOL(pcmcia_adjust_resource_info);
/*====================================================================*/
static void nonstatic_release_resource_db(struct pcmcia_socket *s)
{
resource_map_t *p, *q;
for (p = s->mem_db.next; p != &s->mem_db; p = q) {
q = p->next;
kfree(p);
}
for (p = s->io_db.next; p != &s->io_db; p = q) {
q = p->next;
kfree(p);
}
}
void pcmcia_validate_mem(struct pcmcia_socket *s) void pcmcia_validate_mem(struct pcmcia_socket *s)
{ {
if (s->resource_ops->validate_mem) if (s->resource_ops->validate_mem)
...@@ -1034,12 +290,3 @@ struct pccard_resource_ops pccard_static_ops = { ...@@ -1034,12 +290,3 @@ struct pccard_resource_ops pccard_static_ops = {
.adjust_resource = NULL, .adjust_resource = NULL,
.exit = NULL, .exit = NULL,
}; };
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,
.adjust_resource = nonstatic_adjust_resource_info,
.exit = nonstatic_release_resource_db,
};
drivers/pcmcia/rsrc_nonstatic.c 0 → 100644
View file @ be1f106c
/*
* 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/config.h>
#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 <asm/irq.h>
#include <asm/io.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <pcmcia/bulkmem.h>
#include <pcmcia/cistpl.h>
#include "cs_internal.h"
/* 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
typedef struct resource_map_t resource_map_t;
static DECLARE_MUTEX(rsrc_sem);
#define MEM_PROBE_LOW (1 << 0)
#define MEM_PROBE_HIGH (1 << 1)
/*======================================================================
Linux resource management extensions
======================================================================*/
static struct resource *
make_resource(unsigned long b, unsigned long n, int flags, char *name)
{
struct resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
if (res) {
memset(res, 0, sizeof(*res));
res->name = name;
res->start = b;
res->end = b + n - 1;
res->flags = flags;
}
return res;
}
static struct resource *
claim_region(struct pcmcia_socket *s, unsigned long base, unsigned long size,
int type, char *name)
{
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(resource_map_t *map, u_long base, u_long num)
{
resource_map_t *p, *q;
for (p = map; ; p = p->next) {
if ((p != map) && (p->base+p->num-1 >= base))
return -1;
if ((p->next == map) || (p->next->base > base+num-1))
break;
}
q = kmalloc(sizeof(resource_map_t), GFP_KERNEL);
if (!q) return CS_OUT_OF_RESOURCE;
q->base = base; q->num = num;
q->next = p->next; p->next = q;
return CS_SUCCESS;
}
/*====================================================================*/
static int sub_interval(resource_map_t *map, u_long base, u_long num)
{
resource_map_t *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(resource_map_t), GFP_KERNEL);
if (!p) return CS_OUT_OF_RESOURCE;
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 CS_SUCCESS;
}
/*======================================================================
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, ioaddr_t base, ioaddr_t num)
{
struct resource *res;
ioaddr_t i, j, bad, any;
u_char *b, hole, most;
printk(KERN_INFO "cs: IO port probe 0x%04x-0x%04x:",
base, base+num-1);
/* First, what does a floating port look like? */
b = kmalloc(256, GFP_KERNEL);
if (!b) {
printk(KERN_ERR "do_io_probe: unable to kmalloc 256 bytes");
return;
}
memset(b, 0, 256);
for (i = base, most = 0; i < base+num; i += 8) {
res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA IO probe");
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 IO probe");
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->io_db, bad, i-bad);
printk(" %#04x-%#04x", 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->io_db, bad, i-bad);
printk(" %#04x-%#04x", bad, i-1);
}
}
printk(any ? "\n" : " clean.\n");
}
#endif
/*======================================================================
This is tricky... when we set up CIS memory, we try to validate
the memory window space allocations.
======================================================================*/
/* Validation function for cards with a valid CIS */
static int readable(struct pcmcia_socket *s, struct resource *res, cisinfo_t *info)
{
int ret = -1;
s->cis_mem.res = res;
s->cis_virt = ioremap(res->start, s->map_size);
if (s->cis_virt) {
ret = pccard_validate_cis(s, BIND_FN_ALL, info);
/* invalidate mapping and CIS cache */
iounmap(s->cis_virt);
s->cis_virt = NULL;
destroy_cis_cache(s);
}
s->cis_mem.res = NULL;
if ((ret != 0) || (info->Chains == 0))
return 0;
return 1;
}
/* Validation function for simple memory cards */
static int checksum(struct pcmcia_socket *s, struct resource *res)
{
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);
}
return (b == -1) ? -1 : (a>>1);
}
static int
cis_readable(struct pcmcia_socket *s, unsigned long base, unsigned long size)
{
struct resource *res1, *res2;
cisinfo_t info1, info2;
int ret = 0;
res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
if (res1 && res2) {
ret = readable(s, res1, &info1);
ret += readable(s, res2, &info2);
}
free_region(res2);
free_region(res1);
return (ret == 2) && (info1.Chains == info2.Chains);
}
static int
checksum_match(struct pcmcia_socket *s, unsigned long base, unsigned long size)
{
struct resource *res1, *res2;
int a = -1, b = -1;
res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
if (res1 && res2) {
a = checksum(s, res1);
b = checksum(s, res2);
}
free_region(res2);
free_region(res1);
return (a == b) && (a >= 0);
}
/*======================================================================
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.
======================================================================*/
static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s)
{
u_long i, j, bad, fail, step;
printk(KERN_INFO "cs: memory probe 0x%06lx-0x%06lx:",
base, base+num-1);
bad = fail = 0;
step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
/* 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 (cis_readable(s, j, step))
break;
}
fail = ((i == base) && (j == base+num));
}
if (fail) {
for (j = i; j < base+num; j += 2*step)
if (checksum_match(s, j, step) &&
checksum_match(s, j + step, step))
break;
}
if (i != j) {
if (!bad) printk(" excluding");
printk(" %#05lx-%#05lx", i, j-1);
sub_interval(&s->mem_db, i, j-i);
bad += j-i;
}
}
printk(bad ? "\n" : " clean.\n");
return (num - bad);
}
#ifdef CONFIG_PCMCIA_PROBE
static u_long inv_probe(resource_map_t *m, struct pcmcia_socket *s)
{
u_long ok;
if (m == &s->mem_db)
return 0;
ok = inv_probe(m->next, s);
if (ok) {
if (m->base >= 0x100000)
sub_interval(&s->mem_db, m->base, m->num);
return ok;
}
if (m->base < 0x100000)
return 0;
return do_mem_probe(m->base, m->num, s);
}
static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
{
resource_map_t *m, mm;
static u_char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
u_long b, i, ok = 0;
/* We do up to four passes through the list */
if (probe_mask & MEM_PROBE_HIGH) {
if (inv_probe(s->mem_db.next, s) > 0)
return;
printk(KERN_NOTICE "cs: warning: no high memory space "
"available!\n");
}
if ((probe_mask & MEM_PROBE_LOW) == 0)
return;
for (m = s->mem_db.next; m != &s->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(mm.base, mm.num, s);
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->mem_db, b, 0x10000);
else
ok += do_mem_probe(b, 0x10000, s);
}
}
}
}
#else /* CONFIG_PCMCIA_PROBE */
static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
{
resource_map_t *m, mm;
for (m = s->mem_db.next; m != &s->mem_db; m = mm.next) {
mm = *m;
if (do_mem_probe(mm.base, mm.num, s))
break;
}
}
#endif /* CONFIG_PCMCIA_PROBE */
/*
* Locking note: this is the only place where we take
* both rsrc_sem and skt_sem.
*/
static void pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
{
if (probe_mem) {
unsigned int probe_mask;
down(&rsrc_sem);
probe_mask = MEM_PROBE_LOW;
if (s->features & SS_CAP_PAGE_REGS)
probe_mask = MEM_PROBE_HIGH;
if (probe_mask & ~s->rsrc_mem_probe) {
s->rsrc_mem_probe |= probe_mask;
down(&s->skt_sem);
if (s->state & SOCKET_PRESENT)
validate_mem(s, probe_mask);
up(&s->skt_sem);
}
up(&rsrc_sem);
}
}
struct pcmcia_align_data {
unsigned long mask;
unsigned long offset;
resource_map_t *map;
};
static void
pcmcia_common_align(void *align_data, struct resource *res,
unsigned long size, unsigned long align)
{
struct pcmcia_align_data *data = align_data;
unsigned long start;
/*
* Ensure that we have the correct start address
*/
start = (res->start & ~data->mask) + data->offset;
if (start < res->start)
start += data->mask + 1;
res->start = start;
}
static void
pcmcia_align(void *align_data, struct resource *res,
unsigned long size, unsigned long align)
{
struct pcmcia_align_data *data = align_data;
resource_map_t *m;
pcmcia_common_align(data, res, size, align);
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) {
res->start = start;
pcmcia_common_align(data, res, size, align);
}
/*
* 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)
res->start = res->end;
}
/*
* 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)
{
resource_map_t *m;
int ret = -ENOMEM;
down(&rsrc_sem);
for (m = s->io_db.next; m != &s->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;
}
up(&rsrc_sem);
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'.
======================================================================*/
struct resource *nonstatic_find_io_region(unsigned long base, int num,
unsigned long align, struct pcmcia_socket *s)
{
struct resource *res = make_resource(0, num, IORESOURCE_IO, s->dev.class_id);
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->io_db;
down(&rsrc_sem);
#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);
up(&rsrc_sem);
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
struct resource * nonstatic_find_mem_region(u_long base, u_long num, u_long align,
int low, struct pcmcia_socket *s)
{
struct resource *res = make_resource(0, num, IORESOURCE_MEM, s->dev.class_id);
struct pcmcia_align_data data;
unsigned long min, max;
int ret, i;
low = low || !(s->features & SS_CAP_PAGE_REGS);
data.mask = align - 1;
data.offset = base & data.mask;
data.map = &s->mem_db;
for (i = 0; i < 2; i++) {
if (low) {
max = 0x100000UL;
min = base < max ? base : 0;
} else {
max = ~0UL;
min = 0x100000UL + base;
}
down(&rsrc_sem);
#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);
up(&rsrc_sem);
if (ret == 0 || low)
break;
low = 1;
}
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
static int adjust_memory(struct pcmcia_socket *s, adjust_t *adj)
{
u_long base, num;
int ret;
base = adj->resource.memory.Base;
num = adj->resource.memory.Size;
if ((num == 0) || (base+num-1 < base))
return CS_BAD_SIZE;
ret = CS_SUCCESS;
down(&rsrc_sem);
switch (adj->Action) {
case ADD_MANAGED_RESOURCE:
ret = add_interval(&s->mem_db, base, num);
break;
case REMOVE_MANAGED_RESOURCE:
ret = sub_interval(&s->mem_db, base, num);
if (ret == CS_SUCCESS) {
struct pcmcia_socket *socket;
down_read(&pcmcia_socket_list_rwsem);
list_for_each_entry(socket, &pcmcia_socket_list, socket_list)
release_cis_mem(socket);
up_read(&pcmcia_socket_list_rwsem);
}
break;
default:
ret = CS_UNSUPPORTED_FUNCTION;
}
up(&rsrc_sem);
return ret;
}
static int adjust_io(struct pcmcia_socket *s, adjust_t *adj)
{
int base, num, ret = CS_SUCCESS;
base = adj->resource.io.BasePort;
num = adj->resource.io.NumPorts;
if ((base < 0) || (base > 0xffff))
return CS_BAD_BASE;
if ((num <= 0) || (base+num > 0x10000) || (base+num <= base))
return CS_BAD_SIZE;
down(&rsrc_sem);
switch (adj->Action) {
case ADD_MANAGED_RESOURCE:
if (add_interval(&s->io_db, base, num) != 0) {
ret = CS_IN_USE;
break;
}
#ifdef CONFIG_PCMCIA_PROBE
if (probe_io)
do_io_probe(s, base, num);
#endif
break;
case REMOVE_MANAGED_RESOURCE:
sub_interval(&s->io_db, base, num);
break;
default:
ret = CS_UNSUPPORTED_FUNCTION;
break;
}
up(&rsrc_sem);
return ret;
}
static int nonstatic_adjust_resource_info(struct pcmcia_socket *s, adjust_t *adj)
{
switch (adj->Resource) {
case RES_MEMORY_RANGE:
return adjust_memory(s, adj);
case RES_IO_RANGE:
return adjust_io(s, adj);
}
return CS_UNSUPPORTED_FUNCTION;
}
static void nonstatic_release_resource_db(struct pcmcia_socket *s)
{
resource_map_t *p, *q;
for (p = s->mem_db.next; p != &s->mem_db; p = q) {
q = p->next;
kfree(p);
}
for (p = s->io_db.next; p != &s->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,
.adjust_resource = nonstatic_adjust_resource_info,
.exit = nonstatic_release_resource_db,
};
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