diff options
Diffstat (limited to 'drivers/pcmcia/rsrc_nonstatic.c')
| -rw-r--r-- | drivers/pcmcia/rsrc_nonstatic.c | 985 |
1 files changed, 985 insertions, 0 deletions
diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c new file mode 100644 index 00000000000..5876bab7c14 --- /dev/null +++ b/drivers/pcmcia/rsrc_nonstatic.c @@ -0,0 +1,985 @@ +/* + * 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 <linux/device.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" + +MODULE_AUTHOR("David A. Hinds, Dominik Brodowski"); +MODULE_LICENSE("GPL"); + +/* Parameters that can be set with 'insmod' */ + +#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) + +INT_MODULE_PARM(probe_mem, 1); /* memory probe? */ +#ifdef CONFIG_PCMCIA_PROBE +INT_MODULE_PARM(probe_io, 1); /* IO port probe? */ +INT_MODULE_PARM(mem_limit, 0x10000); +#endif + +/* for io_db and mem_db */ +struct resource_map { + u_long base, num; + struct resource_map *next; +}; + +struct socket_data { + struct resource_map mem_db; + struct resource_map io_db; + unsigned int rsrc_mem_probe; +}; + +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(struct resource_map *map, u_long base, u_long num) +{ + struct resource_map *p, *q; + + for (p = map; ; p = p->next) { + if ((p != map) && (p->base+p->num-1 >= base)) + return -1; + if ((p->next == map) || (p->next->base > base+num-1)) + break; + } + q = kmalloc(sizeof(struct resource_map), 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(struct resource_map *map, u_long base, u_long num) +{ + struct resource_map *p, *q; + + for (p = map; ; p = q) { + q = p->next; + if (q == map) + break; + if ((q->base+q->num > base) && (base+num > q->base)) { + if (q->base >= base) { + if (q->base+q->num <= base+num) { + /* Delete whole block */ + p->next = q->next; + kfree(q); + /* don't advance the pointer yet */ + q = p; + } else { + /* Cut off bit from the front */ + q->num = q->base + q->num - base - num; + q->base = base + num; + } + } else if (q->base+q->num <= base+num) { + /* Cut off bit from the end */ + q->num = base - q->base; + } else { + /* Split the block into two pieces */ + p = kmalloc(sizeof(struct resource_map), GFP_KERNEL); + if (!p) 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, kio_addr_t base, kio_addr_t num) +{ + struct resource *res; + struct socket_data *s_data = s->resource_data; + kio_addr_t i, j, bad; + int any; + u_char *b, hole, most; + + printk(KERN_INFO "cs: IO port probe %#lx-%#lx:", + 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_data->io_db, bad, i-bad); + printk(" %#lx-%#lx", 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_data->io_db, bad, i-bad); + printk(" %#lx-%#lx", 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) +{ + struct socket_data *s_data = s->resource_data; + 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_data->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(struct resource_map *m, struct pcmcia_socket *s) +{ + struct socket_data *s_data = s->resource_data; + u_long ok; + if (m == &s_data->mem_db) + return 0; + ok = inv_probe(m->next, s); + if (ok) { + if (m->base >= 0x100000) + sub_interval(&s_data->mem_db, m->base, m->num); + return ok; + } + if (m->base < 0x100000) + return 0; + return do_mem_probe(m->base, m->num, s); +} + +static void validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) +{ + struct resource_map *m, mm; + static u_char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 }; + u_long b, i, ok = 0; + struct socket_data *s_data = s->resource_data; + + /* We do up to four passes through the list */ + if (probe_mask & MEM_PROBE_HIGH) { + if (inv_probe(s_data->mem_db.next, s) > 0) + return; + printk(KERN_NOTICE "cs: warning: no high memory space " + "available!\n"); + } + if ((probe_mask & MEM_PROBE_LOW) == 0) + return; + for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { + mm = *m; + /* Only probe < 1 MB */ + if (mm.base >= 0x100000) continue; + if ((mm.base | mm.num) & 0xffff) { + ok += do_mem_probe(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_data->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) +{ + struct resource_map *m, mm; + struct socket_data *s_data = s->resource_data; + + for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { + mm = *m; + if (do_mem_probe(mm.base, mm.num, s)) + break; + } +} + +#endif /* CONFIG_PCMCIA_PROBE */ + + +/* + * Locking note: Must be called with skt_sem held! + */ +static void pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s) +{ + struct socket_data *s_data = s->resource_data; + 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_data->rsrc_mem_probe) { + s_data->rsrc_mem_probe |= probe_mask; + + if (s->state & SOCKET_PRESENT) + validate_mem(s, probe_mask); + } + + up(&rsrc_sem); + } +} + +struct pcmcia_align_data { + unsigned long mask; + unsigned long offset; + struct resource_map *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; + struct resource_map *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) +{ + struct resource_map *m; + struct socket_data *s_data = s->resource_data; + int ret = -ENOMEM; + + down(&rsrc_sem); + for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) { + unsigned long start = m->base; + unsigned long end = m->base + m->num - 1; + + if (start > r_start || r_end > end) + continue; + + ret = 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 socket_data *s_data = s->resource_data; + 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_data->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 socket_data *s_data = s->resource_data; + 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_data->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; + struct socket_data *data = s->resource_data; + 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(&data->mem_db, base, num); + break; + case REMOVE_MANAGED_RESOURCE: + ret = sub_interval(&data->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) +{ + struct socket_data *data = s->resource_data; + kio_addr_t base, num; + int 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(&data->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(&data->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 int nonstatic_init(struct pcmcia_socket *s) +{ + struct socket_data *data; + + data = kmalloc(sizeof(struct socket_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + memset(data, 0, sizeof(struct socket_data)); + + data->mem_db.next = &data->mem_db; + data->io_db.next = &data->io_db; + + s->resource_data = (void *) data; + + return 0; +} + +static void nonstatic_release_resource_db(struct pcmcia_socket *s) +{ + struct socket_data *data = s->resource_data; + struct resource_map *p, *q; + + down(&rsrc_sem); + 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); + } + up(&rsrc_sem); +} + + +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, + .init = nonstatic_init, + .exit = nonstatic_release_resource_db, +}; +EXPORT_SYMBOL(pccard_nonstatic_ops); + + +/* sysfs interface to the resource database */ + +static ssize_t show_io_db(struct class_device *class_dev, char *buf) +{ + struct pcmcia_socket *s = class_get_devdata(class_dev); + struct socket_data *data; + struct resource_map *p; + ssize_t ret = 0; + + down(&rsrc_sem); + data = s->resource_data; + + for (p = data->io_db.next; p != &data->io_db; p = p->next) { + if (ret > (PAGE_SIZE - 10)) + continue; + ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1), + "0x%08lx - 0x%08lx\n", + ((unsigned long) p->base), + ((unsigned long) p->base + p->num - 1)); + } + + up(&rsrc_sem); + return (ret); +} + +static ssize_t store_io_db(struct class_device *class_dev, const char *buf, size_t count) +{ + struct pcmcia_socket *s = class_get_devdata(class_dev); + unsigned long start_addr, end_addr; + unsigned int add = 1; + adjust_t adj; + ssize_t ret = 0; + + ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); + if (ret != 2) { + ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); + add = 0; + if (ret != 2) { + ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr); + add = 1; + if (ret != 2) + return -EINVAL; + } + } + if (end_addr <= start_addr) + return -EINVAL; + + adj.Action = add ? ADD_MANAGED_RESOURCE : REMOVE_MANAGED_RESOURCE; + adj.Resource = RES_IO_RANGE; + adj.resource.io.BasePort = start_addr; + adj.resource.io.NumPorts = end_addr - start_addr + 1; + + ret = adjust_io(s, &adj); + + return ret ? ret : count; +} +static CLASS_DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db); + +static ssize_t show_mem_db(struct class_device *class_dev, char *buf) +{ + struct pcmcia_socket *s = class_get_devdata(class_dev); + struct socket_data *data; + struct resource_map *p; + ssize_t ret = 0; + + down(&rsrc_sem); + data = s->resource_data; + + for (p = data->mem_db.next; p != &data->mem_db; p = p->next) { + if (ret > (PAGE_SIZE - 10)) + continue; + ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1), + "0x%08lx - 0x%08lx\n", + ((unsigned long) p->base), + ((unsigned long) p->base + p->num - 1)); + } + + up(&rsrc_sem); + return (ret); +} + +static ssize_t store_mem_db(struct class_device *class_dev, const char *buf, size_t count) +{ + struct pcmcia_socket *s = class_get_devdata(class_dev); + unsigned long start_addr, end_addr; + unsigned int add = 1; + adjust_t adj; + ssize_t ret = 0; + + ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); + if (ret != 2) { + ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); + add = 0; + if (ret != 2) { + ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr); + add = 1; + if (ret != 2) + return -EINVAL; + } + } + if (end_addr <= start_addr) + return -EINVAL; + + adj.Action = add ? ADD_MANAGED_RESOURCE : REMOVE_MANAGED_RESOURCE; + adj.Resource = RES_MEMORY_RANGE; + adj.resource.memory.Base = start_addr; + adj.resource.memory.Size = end_addr - start_addr + 1; + + ret = adjust_memory(s, &adj); + + return ret ? ret : count; +} +static CLASS_DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db); + +static struct class_device_attribute *pccard_rsrc_attributes[] = { + &class_device_attr_available_resources_io, + &class_device_attr_available_resources_mem, + NULL, +}; + +static int __devinit pccard_sysfs_add_rsrc(struct class_device *class_dev) +{ + struct pcmcia_socket *s = class_get_devdata(class_dev); + struct class_device_attribute **attr; + int ret = 0; + if (s->resource_ops != &pccard_nonstatic_ops) + return 0; + + for (attr = pccard_rsrc_attributes; *attr; attr++) { + ret = class_device_create_file(class_dev, *attr); + if (ret) + break; + } + + return ret; +} + +static void __devexit pccard_sysfs_remove_rsrc(struct class_device *class_dev) +{ + struct pcmcia_socket *s = class_get_devdata(class_dev); + struct class_device_attribute **attr; + + if (s->resource_ops != &pccard_nonstatic_ops) + return; + + for (attr = pccard_rsrc_attributes; *attr; attr++) + class_device_remove_file(class_dev, *attr); +} + +static struct class_interface pccard_rsrc_interface = { + .class = &pcmcia_socket_class, + .add = &pccard_sysfs_add_rsrc, + .remove = __devexit_p(&pccard_sysfs_remove_rsrc), +}; + +static int __init nonstatic_sysfs_init(void) +{ + return class_interface_register(&pccard_rsrc_interface); +} + +static void __exit nonstatic_sysfs_exit(void) +{ + class_interface_unregister(&pccard_rsrc_interface); +} + +module_init(nonstatic_sysfs_init); +module_exit(nonstatic_sysfs_exit); |