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drivers/pcmcia/rsrc_nonstatic.c
29.5 KB
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// SPDX-License-Identifier: GPL-2.0-only |
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/* * rsrc_nonstatic.c -- Resource management routines for !SS_CAP_STATIC_MAP sockets * |
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* 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 */ |
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#include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/ioport.h> #include <linux/timer.h> #include <linux/pci.h> #include <linux/device.h> |
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#include <linux/io.h> |
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#include <asm/irq.h> |
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#include <pcmcia/ss.h> |
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#include <pcmcia/cistpl.h> #include "cs_internal.h" |
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/* moved to rsrc_mgr.c |
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MODULE_AUTHOR("David A. Hinds, Dominik Brodowski"); MODULE_LICENSE("GPL"); |
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*/ |
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/* Parameters that can be set with 'insmod' */ #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) INT_MODULE_PARM(probe_mem, 1); /* memory probe? */ #ifdef CONFIG_PCMCIA_PROBE INT_MODULE_PARM(probe_io, 1); /* IO port probe? */ INT_MODULE_PARM(mem_limit, 0x10000); #endif /* for io_db and mem_db */ struct resource_map { u_long base, num; struct resource_map *next; }; struct socket_data { struct resource_map mem_db; |
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struct resource_map mem_db_valid; |
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struct resource_map io_db; |
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}; |
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#define MEM_PROBE_LOW (1 << 0) #define MEM_PROBE_HIGH (1 << 1) |
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/* Action field */ #define REMOVE_MANAGED_RESOURCE 1 #define ADD_MANAGED_RESOURCE 2 |
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/*====================================================================== Linux resource management extensions ======================================================================*/ static struct resource * |
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claim_region(struct pcmcia_socket *s, resource_size_t base, resource_size_t size, int type, char *name) |
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{ struct resource *res, *parent; parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource; |
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res = pcmcia_make_resource(base, size, type | IORESOURCE_BUSY, name); |
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if (res) { #ifdef CONFIG_PCI if (s && s->cb_dev) parent = pci_find_parent_resource(s->cb_dev, res); #endif if (!parent || request_resource(parent, res)) { kfree(res); res = NULL; } } return res; } static void free_region(struct resource *res) { if (res) { release_resource(res); kfree(res); } } /*====================================================================== These manage the internal databases of available resources. ======================================================================*/ static int add_interval(struct resource_map *map, u_long base, u_long num) { |
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struct resource_map *p, *q; |
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for (p = map; ; p = p->next) { |
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if ((p != map) && (p->base+p->num >= base)) { p->num = max(num + base - p->base, p->num); return 0; } |
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if ((p->next == map) || (p->next->base > base+num-1)) break; } q = kmalloc(sizeof(struct resource_map), GFP_KERNEL); if (!q) { printk(KERN_WARNING "out of memory to update resources "); return -ENOMEM; } q->base = base; q->num = num; q->next = p->next; p->next = q; return 0; |
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} /*====================================================================*/ static int sub_interval(struct resource_map *map, u_long base, u_long num) { |
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struct resource_map *p, *q; for (p = map; ; p = q) { q = p->next; if (q == map) break; if ((q->base+q->num > base) && (base+num > q->base)) { if (q->base >= base) { if (q->base+q->num <= base+num) { /* Delete whole block */ p->next = q->next; kfree(q); /* don't advance the pointer yet */ q = p; } else { /* Cut off bit from the front */ q->num = q->base + q->num - base - num; q->base = base + num; } } else if (q->base+q->num <= base+num) { /* Cut off bit from the end */ q->num = base - q->base; } else { /* Split the block into two pieces */ p = kmalloc(sizeof(struct resource_map), GFP_KERNEL); if (!p) { printk(KERN_WARNING "out of memory to update resources "); return -ENOMEM; } p->base = base+num; p->num = q->base+q->num - p->base; q->num = base - q->base; p->next = q->next ; q->next = p; } |
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} |
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} return 0; |
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} /*====================================================================== These routines examine a region of IO or memory addresses to determine what ranges might be genuinely available. ======================================================================*/ #ifdef CONFIG_PCMCIA_PROBE |
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static void do_io_probe(struct pcmcia_socket *s, unsigned int base, unsigned int num) |
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{ |
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struct resource *res; struct socket_data *s_data = s->resource_data; unsigned int i, j, bad; int any; u_char *b, hole, most; |
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dev_info(&s->dev, "cs: IO port probe %#x-%#x:", base, base+num-1); |
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/* First, what does a floating port look like? */ b = kzalloc(256, GFP_KERNEL); if (!b) { |
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pr_cont(" "); dev_err(&s->dev, "do_io_probe: unable to kmalloc 256 bytes "); |
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return; } for (i = base, most = 0; i < base+num; i += 8) { |
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res = claim_region(s, i, 8, IORESOURCE_IO, "PCMCIA ioprobe"); |
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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) { |
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res = claim_region(s, i, 8, IORESOURCE_IO, "PCMCIA ioprobe"); if (!res) { if (!any) |
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pr_cont(" excluding"); |
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if (!bad) bad = any = i; |
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continue; |
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} |
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for (j = 0; j < 8; j++) if (inb(i+j) != most) break; free_region(res); if (j < 8) { if (!any) |
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pr_cont(" excluding"); |
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if (!bad) bad = any = i; } else { if (bad) { sub_interval(&s_data->io_db, bad, i-bad); |
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pr_cont(" %#x-%#x", bad, i-1); |
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bad = 0; } } } if (bad) { if ((num > 16) && (bad == base) && (i == base+num)) { |
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sub_interval(&s_data->io_db, bad, i-bad); |
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pr_cont(" nothing: probe failed. "); |
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return; } else { sub_interval(&s_data->io_db, bad, i-bad); |
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pr_cont(" %#x-%#x", bad, i-1); |
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} } |
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pr_cont("%s ", !any ? " clean" : ""); |
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} #endif |
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/*======================================================================*/ |
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/** * readable() - iomem validation function for cards with a valid CIS */ |
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static int readable(struct pcmcia_socket *s, struct resource *res, unsigned int *count) |
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{ |
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int ret = -EINVAL; |
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if (s->fake_cis) { dev_dbg(&s->dev, "fake CIS is being used: can't validate mem "); return 0; } |
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s->cis_mem.res = res; s->cis_virt = ioremap(res->start, s->map_size); if (s->cis_virt) { |
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mutex_unlock(&s->ops_mutex); |
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/* as we're only called from pcmcia.c, we're safe */ if (s->callback->validate) ret = s->callback->validate(s, count); |
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/* invalidate mapping */ |
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mutex_lock(&s->ops_mutex); |
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iounmap(s->cis_virt); s->cis_virt = NULL; |
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} s->cis_mem.res = NULL; |
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if ((ret) || (*count == 0)) return -EINVAL; return 0; |
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} |
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/** * checksum() - iomem validation function for simple memory cards */ static int checksum(struct pcmcia_socket *s, struct resource *res, unsigned int *value) |
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{ pccard_mem_map map; int i, a = 0, b = -1, d; void __iomem *virt; virt = ioremap(res->start, s->map_size); if (virt) { map.map = 0; map.flags = MAP_ACTIVE; map.speed = 0; map.res = res; map.card_start = 0; s->ops->set_mem_map(s, &map); /* Don't bother checking every word... */ for (i = 0; i < s->map_size; i += 44) { d = readl(virt+i); a += d; b &= d; } map.flags = 0; s->ops->set_mem_map(s, &map); iounmap(virt); } |
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if (b == -1) return -EINVAL; |
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*value = a; |
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return 0; |
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} |
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/** * do_validate_mem() - low level validate a memory region for PCMCIA use * @s: PCMCIA socket to validate * @base: start address of resource to check * @size: size of resource to check * @validate: validation function to use * * do_validate_mem() splits up the memory region which is to be checked * into two parts. Both are passed to the @validate() function. If * @validate() returns non-zero, or the value parameter to @validate() * is zero, or the value parameter is different between both calls, * the check fails, and -EINVAL is returned. Else, 0 is returned. */ static int do_validate_mem(struct pcmcia_socket *s, unsigned long base, unsigned long size, int validate (struct pcmcia_socket *s, struct resource *res, unsigned int *value)) |
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{ |
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struct socket_data *s_data = s->resource_data; |
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struct resource *res1, *res2; |
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unsigned int info1 = 1, info2 = 1; int ret = -EINVAL; |
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res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe"); res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "PCMCIA memprobe"); |
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if (res1 && res2) { |
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ret = 0; if (validate) { ret = validate(s, res1, &info1); ret += validate(s, res2, &info2); } |
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} |
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dev_dbg(&s->dev, "cs: memory probe 0x%06lx-0x%06lx: %pr %pr %u %u %u", |
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base, base+size-1, res1, res2, ret, info1, info2); |
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free_region(res2); free_region(res1); |
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if ((ret) || (info1 != info2) || (info1 == 0)) return -EINVAL; |
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if (validate && !s->fake_cis) { /* move it to the validated data set */ add_interval(&s_data->mem_db_valid, base, size); sub_interval(&s_data->mem_db, base, size); |
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} |
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return 0; |
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} |
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/** * do_mem_probe() - validate a memory region for PCMCIA use * @s: PCMCIA socket to validate * @base: start address of resource to check * @num: size of resource to check * @validate: validation function to use * @fallback: validation function to use if validate fails * * do_mem_probe() checks a memory region for use by the PCMCIA subsystem. * To do so, the area is split up into sensible parts, and then passed * into the @validate() function. Only if @validate() and @fallback() fail, * the area is marked as unavaibale for use by the PCMCIA subsystem. The * function returns the size of the usable memory area. */ static int do_mem_probe(struct pcmcia_socket *s, u_long base, u_long num, int validate (struct pcmcia_socket *s, struct resource *res, unsigned int *value), int fallback (struct pcmcia_socket *s, struct resource *res, unsigned int *value)) |
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{ |
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struct socket_data *s_data = s->resource_data; u_long i, j, bad, fail, step; |
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dev_info(&s->dev, "cs: memory probe 0x%06lx-0x%06lx:", base, base+num-1); |
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bad = fail = 0; step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff); /* don't allow too large steps */ if (step > 0x800000) step = 0x800000; /* cis_readable wants to map 2x map_size */ if (step < 2 * s->map_size) step = 2 * s->map_size; for (i = j = base; i < base+num; i = j + step) { if (!fail) { for (j = i; j < base+num; j += step) { |
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if (!do_validate_mem(s, j, step, validate)) |
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break; } fail = ((i == base) && (j == base+num)); } |
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if ((fail) && (fallback)) { for (j = i; j < base+num; j += step) if (!do_validate_mem(s, j, step, fallback)) |
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break; } if (i != j) { if (!bad) |
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pr_cont(" excluding"); pr_cont(" %#05lx-%#05lx", i, j-1); |
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sub_interval(&s_data->mem_db, i, j-i); bad += j-i; } } |
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pr_cont("%s ", !bad ? " clean" : ""); |
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return num - bad; |
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} |
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#ifdef CONFIG_PCMCIA_PROBE |
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/** * inv_probe() - top-to-bottom search for one usuable high memory area * @s: PCMCIA socket to validate * @m: resource_map to check */ |
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static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s) { |
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struct socket_data *s_data = s->resource_data; u_long ok; if (m == &s_data->mem_db) return 0; ok = inv_probe(m->next, s); if (ok) { if (m->base >= 0x100000) sub_interval(&s_data->mem_db, m->base, m->num); return ok; } if (m->base < 0x100000) return 0; |
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return do_mem_probe(s, m->base, m->num, readable, checksum); |
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} |
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/** * validate_mem() - memory probe function * @s: PCMCIA socket to validate * @probe_mask: MEM_PROBE_LOW | MEM_PROBE_HIGH * * The memory probe. If the memory list includes a 64K-aligned block * below 1MB, we probe in 64K chunks, and as soon as we accumulate at * least mem_limit free space, we quit. Returns 0 on usuable ports. */ |
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static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) |
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{ |
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struct resource_map *m, mm; static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 }; unsigned long b, i, ok = 0; struct socket_data *s_data = s->resource_data; |
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/* We do up to four passes through the list */ if (probe_mask & MEM_PROBE_HIGH) { if (inv_probe(s_data->mem_db.next, s) > 0) return 0; |
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if (s_data->mem_db_valid.next != &s_data->mem_db_valid) return 0; |
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dev_notice(&s->dev, |
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"cs: warning: no high memory space available! "); |
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return -ENODEV; |
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} |
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for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { mm = *m; /* Only probe < 1 MB */ if (mm.base >= 0x100000) continue; if ((mm.base | mm.num) & 0xffff) { |
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ok += do_mem_probe(s, mm.base, mm.num, readable, checksum); |
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continue; } /* Special probe for 64K-aligned block */ for (i = 0; i < 4; i++) { b = order[i] << 12; if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) { if (ok >= mem_limit) sub_interval(&s_data->mem_db, b, 0x10000); else |
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ok += do_mem_probe(s, b, 0x10000, readable, checksum); |
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} } |
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} |
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if (ok > 0) return 0; return -ENODEV; |
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} #else /* CONFIG_PCMCIA_PROBE */ |
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/** * validate_mem() - memory probe function * @s: PCMCIA socket to validate * @probe_mask: ignored * * Returns 0 on usuable ports. */ |
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static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) |
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{ struct resource_map *m, mm; struct socket_data *s_data = s->resource_data; |
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unsigned long ok = 0; |
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for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { mm = *m; |
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ok += do_mem_probe(s, mm.base, mm.num, readable, checksum); |
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} |
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if (ok > 0) return 0; return -ENODEV; |
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} #endif /* CONFIG_PCMCIA_PROBE */ |
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/** * pcmcia_nonstatic_validate_mem() - try to validate iomem for PCMCIA use * @s: PCMCIA socket to validate * * This is tricky... when we set up CIS memory, we try to validate * the memory window space allocations. * |
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* Locking note: Must be called with skt_mutex held! |
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*/ |
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static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s) |
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{ struct socket_data *s_data = s->resource_data; |
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unsigned int probe_mask = MEM_PROBE_LOW; |
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int ret; |
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if (!probe_mem || !(s->state & SOCKET_PRESENT)) |
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return 0; |
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if (s->features & SS_CAP_PAGE_REGS) probe_mask = MEM_PROBE_HIGH; |
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ret = validate_mem(s, probe_mask); |
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if (s_data->mem_db_valid.next != &s_data->mem_db_valid) return 0; |
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return ret; |
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} struct pcmcia_align_data { unsigned long mask; unsigned long offset; struct resource_map *map; }; |
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static resource_size_t pcmcia_common_align(struct pcmcia_align_data *align_data, resource_size_t start) |
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{ |
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resource_size_t ret; |
1da177e4c
|
580 581 582 |
/* * Ensure that we have the correct start address */ |
147a27460
|
583 584 585 586 |
ret = (start & ~align_data->mask) + align_data->offset; if (ret < start) ret += align_data->mask + 1; return ret; |
1da177e4c
|
587 |
} |
b26b2d494
|
588 |
static resource_size_t |
3b7a17fcd
|
589 590 |
pcmcia_align(void *align_data, const struct resource *res, resource_size_t size, resource_size_t align) |
1da177e4c
|
591 592 593 |
{ struct pcmcia_align_data *data = align_data; struct resource_map *m; |
b26b2d494
|
594 |
resource_size_t start; |
1da177e4c
|
595 |
|
147a27460
|
596 |
start = pcmcia_common_align(data, res->start); |
1da177e4c
|
597 598 |
for (m = data->map->next; m != data->map; m = m->next) { |
147a27460
|
599 600 |
unsigned long map_start = m->base; unsigned long map_end = m->base + m->num - 1; |
1da177e4c
|
601 602 603 604 605 606 |
/* * If the lower resources are not available, try aligning * to this entry of the resource database to see if it'll * fit here. */ |
147a27460
|
607 608 |
if (start < map_start) start = pcmcia_common_align(data, map_start); |
1da177e4c
|
609 610 611 612 613 |
/* * If we're above the area which was passed in, there's * no point proceeding. */ |
147a27460
|
614 |
if (start >= res->end) |
1da177e4c
|
615 |
break; |
147a27460
|
616 |
if ((start + size - 1) <= map_end) |
1da177e4c
|
617 618 619 620 621 622 623 |
break; } /* * If we failed to find something suitable, ensure we fail. */ if (m == data->map) |
b26b2d494
|
624 625 626 |
start = res->end; return start; |
1da177e4c
|
627 628 629 630 631 632 |
} /* * Adjust an existing IO region allocation, but making sure that we don't * encroach outside the resources which the user supplied. */ |
b19a7275d
|
633 634 635 |
static int __nonstatic_adjust_io_region(struct pcmcia_socket *s, unsigned long r_start, unsigned long r_end) |
1da177e4c
|
636 637 638 639 |
{ struct resource_map *m; struct socket_data *s_data = s->resource_data; int ret = -ENOMEM; |
1da177e4c
|
640 641 642 643 644 645 |
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; |
b19a7275d
|
646 |
ret = 0; |
1da177e4c
|
647 |
} |
1da177e4c
|
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 |
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'. ======================================================================*/ |
b19a7275d
|
664 665 666 |
static struct resource *__nonstatic_find_io_region(struct pcmcia_socket *s, unsigned long base, int num, unsigned long align) |
1da177e4c
|
667 |
{ |
49b1153ad
|
668 669 |
struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO, dev_name(&s->dev)); |
1da177e4c
|
670 671 672 673 |
struct socket_data *s_data = s->resource_data; struct pcmcia_align_data data; unsigned long min = base; int ret; |
1da177e4c
|
674 675 676 |
data.mask = align - 1; data.offset = base & data.mask; data.map = &s_data->io_db; |
1da177e4c
|
677 678 679 680 681 682 683 684 |
#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); |
1da177e4c
|
685 686 687 688 689 690 691 |
if (ret != 0) { kfree(res); res = NULL; } return res; } |
b19a7275d
|
692 693 |
static int nonstatic_find_io(struct pcmcia_socket *s, unsigned int attr, unsigned int *base, unsigned int num, |
ad0c7be28
|
694 |
unsigned int align, struct resource **parent) |
b19a7275d
|
695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 |
{ 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; |
ad0c7be28
|
736 |
*parent = res; |
b19a7275d
|
737 738 739 740 741 742 743 744 745 746 |
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, |
28f65c11f
|
747 |
resource_size(res) + num); |
b19a7275d
|
748 749 750 751 |
if (ret) continue; *base = try; s->io[i].InUse += num; |
ad0c7be28
|
752 |
*parent = res; |
b19a7275d
|
753 754 755 756 757 758 759 760 761 762 763 764 |
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, |
28f65c11f
|
765 766 |
res->start - num, resource_size(res) + num); |
b19a7275d
|
767 768 769 770 |
if (ret) continue; *base = try; s->io[i].InUse += num; |
ad0c7be28
|
771 |
*parent = res; |
b19a7275d
|
772 773 774 775 776 777 778 |
return 0; } } } return -EINVAL; } |
9fea84f46
|
779 |
static struct resource *nonstatic_find_mem_region(u_long base, u_long num, |
e94e15f70
|
780 |
u_long align, int low, struct pcmcia_socket *s) |
1da177e4c
|
781 |
{ |
49b1153ad
|
782 783 |
struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_MEM, dev_name(&s->dev)); |
1da177e4c
|
784 785 786 |
struct socket_data *s_data = s->resource_data; struct pcmcia_align_data data; unsigned long min, max; |
7b4884ca8
|
787 |
int ret, i, j; |
1da177e4c
|
788 789 790 791 792 |
low = low || !(s->features & SS_CAP_PAGE_REGS); data.mask = align - 1; data.offset = base & data.mask; |
1da177e4c
|
793 794 |
for (i = 0; i < 2; i++) { |
7b4884ca8
|
795 |
data.map = &s_data->mem_db_valid; |
1da177e4c
|
796 797 798 799 800 801 802 |
if (low) { max = 0x100000UL; min = base < max ? base : 0; } else { max = ~0UL; min = 0x100000UL + base; } |
7b4884ca8
|
803 |
for (j = 0; j < 2; j++) { |
1da177e4c
|
804 |
#ifdef CONFIG_PCI |
7b4884ca8
|
805 806 807 808 809 |
if (s->cb_dev) { ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1, min, 0, pcmcia_align, &data); } else |
1da177e4c
|
810 |
#endif |
7b4884ca8
|
811 812 813 814 815 816 817 818 819 |
{ ret = allocate_resource(&iomem_resource, res, num, min, max, 1, pcmcia_align, &data); } if (ret == 0) break; data.map = &s_data->mem_db; } |
1da177e4c
|
820 821 822 823 824 825 826 827 828 829 830 |
if (ret == 0 || low) break; low = 1; } if (ret != 0) { kfree(res); res = NULL; } return res; } |
22916638b
|
831 |
static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end) |
1da177e4c
|
832 |
{ |
1da177e4c
|
833 |
struct socket_data *data = s->resource_data; |
22916638b
|
834 835 |
unsigned long size = end - start + 1; int ret = 0; |
1da177e4c
|
836 |
|
1146bc743
|
837 |
if (end < start) |
22916638b
|
838 |
return -EINVAL; |
1da177e4c
|
839 |
|
22916638b
|
840 |
switch (action) { |
1da177e4c
|
841 |
case ADD_MANAGED_RESOURCE: |
22916638b
|
842 |
ret = add_interval(&data->mem_db, start, size); |
3f32b3c09
|
843 844 |
if (!ret) do_mem_probe(s, start, size, NULL, NULL); |
1da177e4c
|
845 846 |
break; case REMOVE_MANAGED_RESOURCE: |
22916638b
|
847 |
ret = sub_interval(&data->mem_db, start, size); |
1da177e4c
|
848 849 |
break; default: |
22916638b
|
850 |
ret = -EINVAL; |
1da177e4c
|
851 |
} |
1da177e4c
|
852 853 854 |
return ret; } |
22916638b
|
855 |
static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end) |
1da177e4c
|
856 857 |
{ struct socket_data *data = s->resource_data; |
41b97ab50
|
858 |
unsigned long size; |
22916638b
|
859 |
int ret = 0; |
1da177e4c
|
860 |
|
9713ab28e
|
861 862 863 864 865 866 |
#if defined(CONFIG_X86) /* on x86, avoid anything < 0x100 for it is often used for * legacy platform devices */ if (start < 0x100) start = 0x100; #endif |
41b97ab50
|
867 |
size = end - start + 1; |
1146bc743
|
868 |
if (end < start) |
22916638b
|
869 870 871 872 |
return -EINVAL; if (end > IO_SPACE_LIMIT) return -EINVAL; |
1da177e4c
|
873 |
|
22916638b
|
874 |
switch (action) { |
1da177e4c
|
875 |
case ADD_MANAGED_RESOURCE: |
22916638b
|
876 877 |
if (add_interval(&data->io_db, start, size) != 0) { ret = -EBUSY; |
1da177e4c
|
878 879 880 881 |
break; } #ifdef CONFIG_PCMCIA_PROBE if (probe_io) |
22916638b
|
882 |
do_io_probe(s, start, size); |
1da177e4c
|
883 884 885 |
#endif break; case REMOVE_MANAGED_RESOURCE: |
22916638b
|
886 |
sub_interval(&data->io_db, start, size); |
1da177e4c
|
887 888 |
break; default: |
22916638b
|
889 |
ret = -EINVAL; |
1da177e4c
|
890 891 |
break; } |
1da177e4c
|
892 893 894 |
return ret; } |
3c29976a6
|
895 896 897 898 899 900 901 902 |
#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; |
0d078f6f9
|
903 |
#if defined(CONFIG_X86) |
cf26e8dc4
|
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 |
/* 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. |
b6d00f0de
|
921 922 923 |
*/ if (s->cb_dev->bus->number == 0) return -EINVAL; |
b6d00f0de
|
924 |
|
cf26e8dc4
|
925 926 927 |
for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) { res = s->cb_dev->bus->resource[i]; #else |
89a74eccc
|
928 |
pci_bus_for_each_resource(s->cb_dev->bus, res, i) { |
cf26e8dc4
|
929 |
#endif |
3c29976a6
|
930 931 932 933 |
if (!res) continue; if (res->flags & IORESOURCE_IO) { |
cf26e8dc4
|
934 935 936 |
/* safeguard against the root resource, where the * risk of hitting any other device would be too * high */ |
3c29976a6
|
937 938 |
if (res == &ioport_resource) continue; |
cf26e8dc4
|
939 |
|
f2e6cf767
|
940 941 942 943 |
dev_info(&s->cb_dev->dev, "pcmcia: parent PCI bridge window: %pR ", res); |
3c29976a6
|
944 945 946 947 948 949 |
if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end)) done |= IORESOURCE_IO; } if (res->flags & IORESOURCE_MEM) { |
cf26e8dc4
|
950 951 952 |
/* safeguard against the root resource, where the * risk of hitting any other device would be too * high */ |
3c29976a6
|
953 954 |
if (res == &iomem_resource) continue; |
cf26e8dc4
|
955 |
|
f2e6cf767
|
956 957 958 959 |
dev_info(&s->cb_dev->dev, "pcmcia: parent PCI bridge window: %pR ", res); |
3c29976a6
|
960 961 962 963 964 965 966 |
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 */ |
54bb5675a
|
967 |
if (done == (IORESOURCE_MEM | IORESOURCE_IO)) |
3c29976a6
|
968 969 970 971 972 973 974 975 976 977 978 979 980 |
s->resource_setup_done = 1; return 0; } #else static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s) { return -ENODEV; } #endif |
1da177e4c
|
981 982 983 |
static int nonstatic_init(struct pcmcia_socket *s) { struct socket_data *data; |
8084b372a
|
984 |
data = kzalloc(sizeof(struct socket_data), GFP_KERNEL); |
1da177e4c
|
985 986 |
if (!data) return -ENOMEM; |
1da177e4c
|
987 988 |
data->mem_db.next = &data->mem_db; |
7b4884ca8
|
989 |
data->mem_db_valid.next = &data->mem_db_valid; |
1da177e4c
|
990 991 992 |
data->io_db.next = &data->io_db; s->resource_data = (void *) data; |
3c29976a6
|
993 |
nonstatic_autoadd_resources(s); |
1da177e4c
|
994 995 996 997 998 999 1000 |
return 0; } static void nonstatic_release_resource_db(struct pcmcia_socket *s) { struct socket_data *data = s->resource_data; struct resource_map *p, *q; |
7b4884ca8
|
1001 1002 1003 1004 |
for (p = data->mem_db_valid.next; p != &data->mem_db_valid; p = q) { q = p->next; kfree(p); } |
1da177e4c
|
1005 1006 1007 1008 1009 1010 1011 1012 |
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); } |
1da177e4c
|
1013 1014 1015 1016 1017 |
} struct pccard_resource_ops pccard_nonstatic_ops = { .validate_mem = pcmcia_nonstatic_validate_mem, |
b19a7275d
|
1018 |
.find_io = nonstatic_find_io, |
1da177e4c
|
1019 |
.find_mem = nonstatic_find_mem_region, |
1da177e4c
|
1020 1021 1022 1023 1024 1025 1026 |
.init = nonstatic_init, .exit = nonstatic_release_resource_db, }; EXPORT_SYMBOL(pccard_nonstatic_ops); /* sysfs interface to the resource database */ |
873733188
|
1027 1028 |
static ssize_t show_io_db(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4c
|
1029 |
{ |
873733188
|
1030 |
struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4c
|
1031 1032 1033 |
struct socket_data *data; struct resource_map *p; ssize_t ret = 0; |
cfe5d8095
|
1034 |
mutex_lock(&s->ops_mutex); |
1da177e4c
|
1035 1036 1037 1038 1039 |
data = s->resource_data; for (p = data->io_db.next; p != &data->io_db; p = p->next) { if (ret > (PAGE_SIZE - 10)) continue; |
6d3fbe919
|
1040 |
ret += scnprintf(&buf[ret], (PAGE_SIZE - ret - 1), |
9fea84f46
|
1041 1042 1043 1044 |
"0x%08lx - 0x%08lx ", ((unsigned long) p->base), ((unsigned long) p->base + p->num - 1)); |
1da177e4c
|
1045 |
} |
cfe5d8095
|
1046 |
mutex_unlock(&s->ops_mutex); |
9fea84f46
|
1047 |
return ret; |
1da177e4c
|
1048 |
} |
873733188
|
1049 1050 1051 |
static ssize_t store_io_db(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4c
|
1052 |
{ |
873733188
|
1053 |
struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4c
|
1054 |
unsigned long start_addr, end_addr; |
22916638b
|
1055 |
unsigned int add = ADD_MANAGED_RESOURCE; |
1da177e4c
|
1056 |
ssize_t ret = 0; |
9fea84f46
|
1057 |
ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); |
1da177e4c
|
1058 |
if (ret != 2) { |
9fea84f46
|
1059 |
ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); |
22916638b
|
1060 |
add = REMOVE_MANAGED_RESOURCE; |
1da177e4c
|
1061 |
if (ret != 2) { |
9fea84f46
|
1062 1063 |
ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr, &end_addr); |
22916638b
|
1064 |
add = ADD_MANAGED_RESOURCE; |
1da177e4c
|
1065 1066 1067 1068 |
if (ret != 2) return -EINVAL; } } |
1146bc743
|
1069 |
if (end_addr < start_addr) |
1da177e4c
|
1070 |
return -EINVAL; |
cfe5d8095
|
1071 |
mutex_lock(&s->ops_mutex); |
22916638b
|
1072 |
ret = adjust_io(s, add, start_addr, end_addr); |
cfe5d8095
|
1073 |
mutex_unlock(&s->ops_mutex); |
1da177e4c
|
1074 1075 1076 |
return ret ? ret : count; } |
873733188
|
1077 |
static DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db); |
1da177e4c
|
1078 |
|
873733188
|
1079 1080 |
static ssize_t show_mem_db(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4c
|
1081 |
{ |
873733188
|
1082 |
struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4c
|
1083 1084 1085 |
struct socket_data *data; struct resource_map *p; ssize_t ret = 0; |
cfe5d8095
|
1086 |
mutex_lock(&s->ops_mutex); |
1da177e4c
|
1087 |
data = s->resource_data; |
7b4884ca8
|
1088 1089 1090 1091 |
for (p = data->mem_db_valid.next; p != &data->mem_db_valid; p = p->next) { if (ret > (PAGE_SIZE - 10)) continue; |
6d3fbe919
|
1092 |
ret += scnprintf(&buf[ret], (PAGE_SIZE - ret - 1), |
7b4884ca8
|
1093 1094 1095 1096 1097 |
"0x%08lx - 0x%08lx ", ((unsigned long) p->base), ((unsigned long) p->base + p->num - 1)); } |
1da177e4c
|
1098 1099 1100 |
for (p = data->mem_db.next; p != &data->mem_db; p = p->next) { if (ret > (PAGE_SIZE - 10)) continue; |
6d3fbe919
|
1101 |
ret += scnprintf(&buf[ret], (PAGE_SIZE - ret - 1), |
9fea84f46
|
1102 1103 1104 1105 |
"0x%08lx - 0x%08lx ", ((unsigned long) p->base), ((unsigned long) p->base + p->num - 1)); |
1da177e4c
|
1106 |
} |
cfe5d8095
|
1107 |
mutex_unlock(&s->ops_mutex); |
9fea84f46
|
1108 |
return ret; |
1da177e4c
|
1109 |
} |
873733188
|
1110 1111 1112 |
static ssize_t store_mem_db(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4c
|
1113 |
{ |
873733188
|
1114 |
struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4c
|
1115 |
unsigned long start_addr, end_addr; |
22916638b
|
1116 |
unsigned int add = ADD_MANAGED_RESOURCE; |
1da177e4c
|
1117 |
ssize_t ret = 0; |
9fea84f46
|
1118 |
ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); |
1da177e4c
|
1119 |
if (ret != 2) { |
9fea84f46
|
1120 |
ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); |
22916638b
|
1121 |
add = REMOVE_MANAGED_RESOURCE; |
1da177e4c
|
1122 |
if (ret != 2) { |
9fea84f46
|
1123 1124 |
ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr, &end_addr); |
22916638b
|
1125 |
add = ADD_MANAGED_RESOURCE; |
1da177e4c
|
1126 1127 1128 1129 |
if (ret != 2) return -EINVAL; } } |
1146bc743
|
1130 |
if (end_addr < start_addr) |
1da177e4c
|
1131 |
return -EINVAL; |
cfe5d8095
|
1132 |
mutex_lock(&s->ops_mutex); |
22916638b
|
1133 |
ret = adjust_memory(s, add, start_addr, end_addr); |
cfe5d8095
|
1134 |
mutex_unlock(&s->ops_mutex); |
1da177e4c
|
1135 1136 1137 |
return ret ? ret : count; } |
873733188
|
1138 |
static DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db); |
1da177e4c
|
1139 |
|
7d5789616
|
1140 1141 1142 |
static struct attribute *pccard_rsrc_attributes[] = { &dev_attr_available_resources_io.attr, &dev_attr_available_resources_mem.attr, |
1da177e4c
|
1143 1144 |
NULL, }; |
7d5789616
|
1145 1146 1147 |
static const struct attribute_group rsrc_attributes = { .attrs = pccard_rsrc_attributes, }; |
34cdf25a1
|
1148 |
static int pccard_sysfs_add_rsrc(struct device *dev, |
d8539d81a
|
1149 |
struct class_interface *class_intf) |
1da177e4c
|
1150 |
{ |
873733188
|
1151 |
struct pcmcia_socket *s = dev_get_drvdata(dev); |
7d5789616
|
1152 |
|
1da177e4c
|
1153 1154 |
if (s->resource_ops != &pccard_nonstatic_ops) return 0; |
7d5789616
|
1155 |
return sysfs_create_group(&dev->kobj, &rsrc_attributes); |
1da177e4c
|
1156 |
} |
e765a02cb
|
1157 |
static void pccard_sysfs_remove_rsrc(struct device *dev, |
d8539d81a
|
1158 |
struct class_interface *class_intf) |
1da177e4c
|
1159 |
{ |
873733188
|
1160 |
struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4c
|
1161 1162 1163 |
if (s->resource_ops != &pccard_nonstatic_ops) return; |
7d5789616
|
1164 |
sysfs_remove_group(&dev->kobj, &rsrc_attributes); |
1da177e4c
|
1165 |
} |
ed49f5d00
|
1166 |
static struct class_interface pccard_rsrc_interface __refdata = { |
1da177e4c
|
1167 |
.class = &pcmcia_socket_class, |
873733188
|
1168 |
.add_dev = &pccard_sysfs_add_rsrc, |
96364e3a5
|
1169 |
.remove_dev = &pccard_sysfs_remove_rsrc, |
1da177e4c
|
1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 |
}; 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); |