-/*======================================================================
-
- Resource management routines
-
- rsrc_mgr.c 1.79 2000/08/30 20:23:58
-
- The contents of this file are subject to the Mozilla Public
- License Version 1.1 (the "License"); you may not use this file
- except in compliance with the License. You may obtain a copy of
- the License at http://www.mozilla.org/MPL/
-
- Software distributed under the License is distributed on an "AS
- IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- implied. See the License for the specific language governing
- rights and limitations under the License.
-
- 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.
-
- Alternatively, the contents of this file may be used under the
- terms of the GNU General Public License version 2 (the "GPL"), in which
- case the provisions of the GPL are applicable instead of the
- above. If you wish to allow the use of your version of this file
- only under the terms of the GPL and not to allow others to use
- your version of this file under the MPL, indicate your decision
- by deleting the provisions above and replace them with the notice
- and other provisions required by the GPL. If you do not delete
- the provisions above, a recipient may use your version of this
- file under either the MPL or the GPL.
-
-======================================================================*/
+/*
+ * rsrc_mgr.c -- Resource management routines and/or wrappers
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The initial developer of the original code is David A. Hinds
+ * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
+ * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
+ *
+ * (C) 1999 David A. Hinds
+ */
#include <linux/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
-
-/*======================================================================
-
- The resource_map_t structures are used to track what resources are
- available for allocation for PC Card devices.
-
-======================================================================*/
-
-typedef struct resource_map_t {
- u_long base, num;
- struct resource_map_t *next;
-} resource_map_t;
-
-/* Memory resource database */
-static resource_map_t mem_db = {
- .next = &mem_db,
-};
-
-/* IO port resource database */
-static resource_map_t io_db = {
- .next = &io_db,
-};
-
-static DECLARE_MUTEX(rsrc_sem);
-static unsigned int rsrc_mem_probe;
-#define MEM_PROBE_LOW (1 << 0)
-#define MEM_PROBE_HIGH (1 << 1)
-
-#ifdef CONFIG_PCMCIA_PROBE
-
-typedef struct irq_info_t {
- u_int Attributes;
- int time_share, dyn_share;
- struct pcmcia_socket *Socket;
-} irq_info_t;
-
-/* Table of IRQ assignments */
-static irq_info_t irq_table[NR_IRQS];
-
-#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(ioaddr_t base, ioaddr_t num)
+static int adjust_irq(struct pcmcia_socket *s, adjust_t *adj)
{
- 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(&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(&io_db, bad, i-bad);
- printk(" %#04x-%#04x", bad, i-1);
- }
- }
-
- printk(any ? "\n" : " clean.\n");
-}
-#endif
+ int irq;
+ u32 mask;
-/*======================================================================
-
- 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;
+ irq = adj->resource.irq.IRQ;
+ if ((irq < 0) || (irq > 15))
+ return CS_BAD_IRQ;
- s->cis_mem.res = res;
- s->cis_virt = ioremap(res->start, s->map_size);
- if (s->cis_virt) {
- ret = pcmcia_validate_cis(s->clients, 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))
+ if (adj->Action != REMOVE_MANAGED_RESOURCE)
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");
+ mask = 1 << irq;
- if (res1 && res2) {
- ret = readable(s, res1, &info1);
- ret += readable(s, res2, &info2);
- }
+ if (!(s->irq_mask & mask))
+ return 0;
- free_region(res2);
- free_region(res1);
+ s->irq_mask &= ~mask;
- return (ret == 2) && (info1.Chains == info2.Chains);
+ return 0;
}
-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);
+#else
- return (a == b) && (a >= 0);
+static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) {
+ return CS_SUCCESS;
}
-/*======================================================================
+#endif
- 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)
+int pcmcia_adjust_resource_info(adjust_t *adj)
{
- u_long i, j, bad, fail, step;
+ struct pcmcia_socket *s;
+ int ret = CS_UNSUPPORTED_FUNCTION;
- 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(&mem_db, i, j-i);
- bad += j-i;
- }
- }
- printk(bad ? "\n" : " clean.\n");
- return (num - bad);
-}
+ down_read(&pcmcia_socket_list_rwsem);
+ list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
-#ifdef CONFIG_PCMCIA_PROBE
+ if (adj->Resource == RES_IRQ)
+ ret = adjust_irq(s, adj);
-static u_long inv_probe(resource_map_t *m, struct pcmcia_socket *s)
-{
- u_long ok;
- if (m == &mem_db)
- return 0;
- ok = inv_probe(m->next, s);
- if (ok) {
- if (m->base >= 0x100000)
- sub_interval(&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(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 = mem_db.next; m != &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;
+ else if (s->resource_ops->adjust_resource)
+ ret = s->resource_ops->adjust_resource(s, adj);
}
- /* 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(&mem_db, b, 0x10000);
- else
- ok += do_mem_probe(b, 0x10000, s);
- }
- }
- }
-}
-
-#else /* CONFIG_PCMCIA_PROBE */
+ up_read(&pcmcia_socket_list_rwsem);
-static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
-{
- resource_map_t *m, mm;
-
- for (m = mem_db.next; m != &mem_db; m = mm.next) {
- mm = *m;
- if (do_mem_probe(mm.base, mm.num, s))
- break;
- }
+ return (ret);
}
+EXPORT_SYMBOL(pcmcia_adjust_resource_info);
-#endif /* CONFIG_PCMCIA_PROBE */
-
-/*
- * Locking note: this is the only place where we take
- * both rsrc_sem and skt_sem.
- */
void pcmcia_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 & ~rsrc_mem_probe) {
- 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);
- }
+ if (s->resource_ops->validate_mem)
+ s->resource_ops->validate_mem(s);
}
-
EXPORT_SYMBOL(pcmcia_validate_mem);
-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.
- */
int 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 = io_db.next; m != &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;
+ if (s->resource_ops->adjust_io_region)
+ return s->resource_ops->adjust_io_region(res, r_start, r_end, s);
+ return -ENOMEM;
}
-/*======================================================================
-
- 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 *find_io_region(unsigned long base, int num,
- unsigned long align, char *name, struct pcmcia_socket *s)
+ 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 = &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;
+ if (s->resource_ops->find_io)
+ return s->resource_ops->find_io(base, num, align, s);
+ return NULL;
}
struct resource *find_mem_region(u_long base, u_long num, u_long align,
- int low, char *name, struct pcmcia_socket *s)
+ 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 = &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;
+ if (s->resource_ops->find_mem)
+ return s->resource_ops->find_mem(base, num, align, low, s);
+ return NULL;
}
-/*======================================================================
-
- This checks to see if an interrupt is available, with support
- for interrupt sharing. We don't support reserving interrupts
- yet. If the interrupt is available, we allocate it.
-
-======================================================================*/
-
-#ifdef CONFIG_PCMCIA_PROBE
-
-static irqreturn_t fake_irq(int i, void *d, struct pt_regs *r) { return IRQ_NONE; }
-static inline int check_irq(int irq)
+void release_resource_db(struct pcmcia_socket *s)
{
- if (request_irq(irq, fake_irq, 0, "bogus", NULL) != 0)
- return -1;
- free_irq(irq, NULL);
- return 0;
+ if (s->resource_ops->exit)
+ s->resource_ops->exit(s);
}
-int try_irq(u_int Attributes, int irq, int specific)
-{
- irq_info_t *info = &irq_table[irq];
- int ret = 0;
-
- down(&rsrc_sem);
- if (info->Attributes & RES_ALLOCATED) {
- switch (Attributes & IRQ_TYPE) {
- case IRQ_TYPE_EXCLUSIVE:
- ret = CS_IN_USE;
- break;
- case IRQ_TYPE_TIME:
- if ((info->Attributes & RES_IRQ_TYPE)
- != RES_IRQ_TYPE_TIME) {
- ret = CS_IN_USE;
- break;
- }
- if (Attributes & IRQ_FIRST_SHARED) {
- ret = CS_BAD_ATTRIBUTE;
- break;
- }
- info->Attributes |= RES_IRQ_TYPE_TIME | RES_ALLOCATED;
- info->time_share++;
- break;
- case IRQ_TYPE_DYNAMIC_SHARING:
- if ((info->Attributes & RES_IRQ_TYPE)
- != RES_IRQ_TYPE_DYNAMIC) {
- ret = CS_IN_USE;
- break;
- }
- if (Attributes & IRQ_FIRST_SHARED) {
- ret = CS_BAD_ATTRIBUTE;
- break;
- }
- info->Attributes |= RES_IRQ_TYPE_DYNAMIC | RES_ALLOCATED;
- info->dyn_share++;
- break;
- }
- } else {
- if ((info->Attributes & RES_RESERVED) && !specific) {
- ret = CS_IN_USE;
- goto out;
- }
- if (check_irq(irq) != 0) {
- ret = CS_IN_USE;
- goto out;
- }
- switch (Attributes & IRQ_TYPE) {
- case IRQ_TYPE_EXCLUSIVE:
- info->Attributes |= RES_ALLOCATED;
- break;
- case IRQ_TYPE_TIME:
- if (!(Attributes & IRQ_FIRST_SHARED)) {
- ret = CS_BAD_ATTRIBUTE;
- break;
- }
- info->Attributes |= RES_IRQ_TYPE_TIME | RES_ALLOCATED;
- info->time_share = 1;
- break;
- case IRQ_TYPE_DYNAMIC_SHARING:
- if (!(Attributes & IRQ_FIRST_SHARED)) {
- ret = CS_BAD_ATTRIBUTE;
- break;
- }
- info->Attributes |= RES_IRQ_TYPE_DYNAMIC | RES_ALLOCATED;
- info->dyn_share = 1;
- break;
- }
- }
- out:
- up(&rsrc_sem);
- return ret;
-}
-
-#endif
-
-/*====================================================================*/
-
-#ifdef CONFIG_PCMCIA_PROBE
-
-void undo_irq(u_int Attributes, int irq)
-{
- irq_info_t *info;
-
- info = &irq_table[irq];
- down(&rsrc_sem);
- switch (Attributes & IRQ_TYPE) {
- case IRQ_TYPE_EXCLUSIVE:
- info->Attributes &= RES_RESERVED;
- break;
- case IRQ_TYPE_TIME:
- info->time_share--;
- if (info->time_share == 0)
- info->Attributes &= RES_RESERVED;
- break;
- case IRQ_TYPE_DYNAMIC_SHARING:
- info->dyn_share--;
- if (info->dyn_share == 0)
- info->Attributes &= RES_RESERVED;
- break;
- }
- up(&rsrc_sem);
-}
-
-#endif
-
-/*======================================================================
-
- The various adjust_* calls form the external interface to the
- resource database.
-
-======================================================================*/
-
-static int adjust_memory(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(&mem_db, base, num);
- break;
- case REMOVE_MANAGED_RESOURCE:
- ret = sub_interval(&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(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(&io_db, base, num) != 0) {
- ret = CS_IN_USE;
- break;
- }
-#ifdef CONFIG_PCMCIA_PROBE
- if (probe_io)
- do_io_probe(base, num);
-#endif
- break;
- case REMOVE_MANAGED_RESOURCE:
- sub_interval(&io_db, base, num);
- break;
- default:
- ret = CS_UNSUPPORTED_FUNCTION;
- break;
- }
- up(&rsrc_sem);
-
- return ret;
-}
-
-/*====================================================================*/
-
-static int adjust_irq(adjust_t *adj)
-{
- int ret = CS_SUCCESS;
-#ifdef CONFIG_PCMCIA_PROBE
- int irq;
- irq_info_t *info;
-
- irq = adj->resource.irq.IRQ;
- if ((irq < 0) || (irq > 15))
- return CS_BAD_IRQ;
- info = &irq_table[irq];
-
- down(&rsrc_sem);
- switch (adj->Action) {
- case ADD_MANAGED_RESOURCE:
- if (info->Attributes & RES_REMOVED)
- info->Attributes &= ~(RES_REMOVED|RES_ALLOCATED);
- else
- if (adj->Attributes & RES_ALLOCATED) {
- ret = CS_IN_USE;
- break;
- }
- if (adj->Attributes & RES_RESERVED)
- info->Attributes |= RES_RESERVED;
- else
- info->Attributes &= ~RES_RESERVED;
- break;
- case REMOVE_MANAGED_RESOURCE:
- if (info->Attributes & RES_REMOVED) {
- ret = 0;
- break;
- }
- if (info->Attributes & RES_ALLOCATED) {
- ret = CS_IN_USE;
- break;
- }
- info->Attributes |= RES_ALLOCATED|RES_REMOVED;
- info->Attributes &= ~RES_RESERVED;
- break;
- default:
- ret = CS_UNSUPPORTED_FUNCTION;
- break;
- }
- up(&rsrc_sem);
-#endif
- return ret;
-}
-
-/*====================================================================*/
-
-int pcmcia_adjust_resource_info(client_handle_t handle, adjust_t *adj)
-{
- if (CHECK_HANDLE(handle))
- return CS_BAD_HANDLE;
-
- switch (adj->Resource) {
- case RES_MEMORY_RANGE:
- return adjust_memory(adj);
- break;
- case RES_IO_RANGE:
- return adjust_io(adj);
- break;
- case RES_IRQ:
- return adjust_irq(adj);
- break;
- }
- return CS_UNSUPPORTED_FUNCTION;
-}
-
-/*====================================================================*/
-
-void release_resource_db(void)
-{
- resource_map_t *p, *q;
-
- for (p = mem_db.next; p != &mem_db; p = q) {
- q = p->next;
- kfree(p);
- }
- for (p = io_db.next; p != &io_db; p = q) {
- q = p->next;
- kfree(p);
- }
-}
+struct pccard_resource_ops pccard_static_ops = {
+ .validate_mem = NULL,
+ .adjust_io_region = NULL,
+ .find_io = NULL,
+ .find_mem = NULL,
+ .adjust_resource = NULL,
+ .exit = NULL,
+};
+EXPORT_SYMBOL(pccard_static_ops);
git://git.onelab.eu / linux-2.6.git / blobdiff